US1513718A - Lock - Google Patents

Description

2 Sheets-Sheet l oct r 1924s T.B. MOREHOUSE LOCK Filed June, 4, 1923 wvewfoz: T. Ex .MoHaHousE om w. w o@ @#0 MLM. mm ww ww .wv -lwlrH am 4.3. om f f ,mw in?? EON c .um EN w lo:

ctv 9 T. B. MOREHOUSE LOCK Filed June 4, 1923 2 Sheets-Sheet 2 om mw wm wvcfnhw T. E. Mom-:Hausa bm \L//// mm m@ m D@ ...b g Ob TU .0,

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MDCKt Application filed June It,

7 'o f/.ZZ whom t may concern Be it known that l, TERRY B. lMount-rotten, a citizen of United States, residing at `Wash ington, District of Columbia, have invented certain new and useful Improvements in Locks, of which the following` is a specification, reference being` had therein to the accompanying drawing.

The present invention relates to locks, and the primary object of the invention is the provision of a novel and improved look so constructed and operable that the lock can be quickly and conveniently changed so as to require different keys.

With ordinary locks, should a key be lost or misplaced, the finder or wrongful holder of the key can open the lock, and, as a matter of protection, the lock must be replaced by another one. It not infrequently happens that the loss of a key may require the replacement of a number of locks. This is especially true on shipboard, there being a navy requirement that all magazine keys bestrictly accounted for and the loss of one magazine key means that the entire set of locks must be replaced. This means from sin or more locks on a destroyer to thirty or forty locks' on a battleship. The same thing applies lo manufacturing plants, warehouses, club-lockers, safedeposit boxes, stores, and the like, inasmuch as the loss of a key renders protection insecure, unless the lock is replaced. Also in cases where the keys are in possession of discharged employees, strikers and other unauthorized persons the locks may be opened, so that they must be substituted in order to assure against unauthorized entries.

lilith ordinary locks, should a key be changed so as to require a different key, after key has been lost or is in the possession lock can only be opened by the newly selected key, thus preventing the lock from beingv opened by the former key and rendeiL ing the former keys useless. A lock of this kind has a large field of use, as above indicated, in

asmuch as key changes can be made wheneY-.fer desired, such as when a key is lost or in the possession of a discharged employee strikerN or other unauthorized person, or when there is a change of employees,

of an unauthorized person, so that the 1923. Serial No. 643,306.

crews, watchmen, and the like. It is also possible to have key changes made daily or periodically. The lock may also be used for railroad switches and signals so that changes in keys can be made, to prevent disaffected persons and strikers from operating the switches and signals without proper authority. The lock is also useful for tool and work boxes in factories, automobiles, mail and dispatch bags, and for many other purposes; in fact, for almost all uses for which locks are now employed, inasmuch as the present lock will fulfill the requirements of an ordinary lock, with the added provision that key changes can be made whenever desirable or necessary.

Another object of the invention is the provision of such a lock which can be 0perated by a combination changing key s0 that upon the insertion of a new key, the lock is changed so as to require the use of the new key to open the lock, and rendering the former keys useless, as well as requiring a new combination changing key to corre spond with the new lock opening key. By this arrangement a combination changing key, corresponding with the lock opening key, can be placed away or keptin safe keeping, so that when it is desired to change keys, the combination changing key can be usedv for setting the lock for the receptionA of a new key, lwhich when inserted and moved will thereby change the combination of the tumblers, so that the lock can no longer be opened by the previous keys, and requiring the new keys to be used, as well as requiring another combination changing key to correspondwith thenew key for the purpose of making another change in keys.

The invention has for its more specific objects to provide such a lock which is rugged, foolproof, easy of manipulation, practical and reliable, vwhich does not involve prohibitive complications or mechanism, so that the lock can be manufactured and sold at a cost comparing favorably with `ordinary locks now on the market, considering the advantages obtained, and which has novel and improved features of construction that are useful and of advantage.

With the foregoing and other objectsin view, which will be apparent as the description proceeds, the invention resides in the construction and arrangement oi" parts, as hereinafter described and clainied, it being understood that changes can he inade Within the scope oliv/hat is claimed, Without departing troni the spirit o't the invention.

The invention is illustrated in the acconi- Qanying drawings, wherein- Figure 1 is a inedian section ot the lock, portions being shown in elevation, With the tinnhlers arranged tor one ley coinhination, and the lrey removed.

Fig. 2 is a view similar to l, With the shackle broken away and showing the key inserted and the parts in position tor opening. the lock.

Fig. 3 is a vien'v siniilar to the combination changing le paratory to a change in lreys.

Fig'. l is a similar view showing the lock after being ogerated hy the combination changing key and such liey removed for the insertion of a new jrey to change the coinbination,

Figs., 5, 6, and S are sections on the respective lines 5*.5, (SM-(3, l-i' and lle-8 ot F l.

A s shown, the ininroveinents are en'ihoeied in a padlock, lout they can he incorporated in cabinet and other types ot loclrsivith suitable variations or alterations in adopting;` the improvements tor different conditions, Within the scope ot what is hereinafter clainied.

The case or hody of the lock comprises loloclr le over which is iitted the open end portion of a shell or jacket 15.A said hloch and shell being fitted together telescopically, and the block ll having an ontstondine,` 'flange 16 against, which the edge of the shell 15 ahiits. rShe case or hody :is shown is ol" the conventional torni oit that oil" the ordinary padlock, and houses and protects the Working parts therein. rllhe shell 15 has the lugs 1'?` and 19 at opposite sides extending); inwardly and abutting' the hlocl: lll, and securing screws 18 and extend through apertures in said lugs and screiv into the `viool; il to :tasten the shell and oloclr toge ier.

The shy rt linih or terniinal ot' the shackle Qleiiters the case or hotly through an onen nre 22 in the top `of the shell 15, andthe one' liinh or terminal ot the shackle entends tiiroigh an aperture in the ton oi said shell. rlhe .longer liinh of the shackle is anchored Ifor sliding and turning inovenient in thecase, said linih having the flat side or cutfaivay portion 25, and a retainer screw 26 is screwed through the Wall orp the shell, 15 and projects into the case, said screw7 hearing against the lat side 25 of the shackle to prevent the complete withdrawal ofthe shackle troni the case, At the loiret end ot' the flat side or cut-away portion 25,

the longer liinh ot the shackle .has an an lr groove Q7, permitting the shac i ti. 'ned when the shorter liinljY is `with troni the case, the screw The shao, immediately helov,v the groove 2'? to cont with the scre'ev 26, when Ithe shorter limo otl the shaclle is withdrawn trthe case. thereby limiting the outward nioveinent ci the shackle. The shell 1V has an ipertnred LO ear through 'which the longer linih oit the shackle extends, to guide the shackle sliding' and turning; niovenient.

l/hen assembling the parts, the screws lfi and il() are insert d thronp'htoe apertures and 23, respectively, the screwY passi A through the ear 2l also7 and atter sait; screiifs are inserted and screwed lic-nie, th siiaclzle 2l is then inserted and the screwY applied to the shell, 'tor anchoring th` shaclzle to the case. lt will he noted that Li screii's are inaccessible traen the shackle is in. cloSed position, so that the 'parte ot the carie cannot he separated unless the shackle pened.

lo. order to aidoinaticallj.,v slide the shawl-:Ic open, or to separate the shackle and the case, when the shaclrle is released, a coiled ing` spring; 30 is confined hetiveen the c i 28 oit the s iacltle and the head of the screiv 20, the end of the longer liinh or" the shaclfle having a finger 29 projecting into l spring. Thus, when the shackle is released the spring; 8O will separate the shackle and caso, to iritldraw the short linih et the shackle trein the case.. and the collar Q8 contacting; with the retainer or stop screw 26. Will liinit the separation ot the shackle and case, and the shackle can then he turned on it ot the gro-ove 2'? heine; brought into tration w t the screw he shackle is held in closed 'position h v s ot :i locking har or latch 3l disposed ediately under the ton oi the case.A the limbs ot the shackle havin, l Q0 t lill?,

j the notches receive the opposite ends ot said har or latch. The latch is mounted 'tor oscillatory niotion to swing into and ont oi the notches transversely ot the shackle. Thus, the latch is engaged hetiveen its ends on a -pivot `pin screwed or otherwise engaged in the tor of the case. A Wire spring 35 has one end secnred in the latch 31, and said spring' etends at an angle from the latch and hears against one side o't Jthe case, to nieve the latch to latching position against a stop 34!- denendine vtroni the ton of the case, and said latch can only he disengaged 'troni the shaclrle hy the use oi a required key.

A hey cylinder is mounted rotation and axial sliding movement in the 1clock 14. and has a reduced lower or outer end portion extendiroj to the hottoin or lower end of the case .and itorniinp; shoulder on. the cylinder to seat in the block lllto limit the downward or outward movement of the cylinder. The cylinder has the inner or upper reduced end portion or neck on which a nut or collar 39 is screi-.v-tln'eaded, and an unlocking member 49 is seatable against the nut 39 and end portion 33 of the cylinder. The member 49 has 'the fingers 4l extending upwardly at an angle toward the top of the case and movable upwardly to overlap the opposite edges of the .latch or bar 3l in order to move the latch to releasing position. A clutch connection is provided between the member 40 and cylinder whereby member and cylinder can be connected and disconnected. Thus, clutch pins 42 are carried by the cylinder? said pins constituting round ended screws engaged between the end portion 33 of the cylinder and the nut 39, and projecting above or beyond said end portion of the cylinder to enter notches or recesses 43 in the lower side of the member 40, to turn said member with the cylinder. Safd pins or screws 42 also lock the nut 39 on the cylinder to prevent said nut from loosening. A coiled spring 44 is confined between the unlocking menr bor 40 and latch 31 and surrounds the pivot pin 33, to retain said spring in place. The spring presses the latch or locking bar 31 against the top of the case, and presses the unlocking member 40 down to engage said member over the clutch pins 42 when the unlocking member and cylinder are turned into registration with one another. The pivot pin 33 is concentric with the `cylinder 35, and the unlocking member 40 has a recess 45 to receive the end of the pin 33 when the inember 40 is raised the full amount, as seen in Fig. 3. rlhe spring 44 also presses the key cylinder down in the case, and the spriing 44 in moving the unlocking member 40 and key cylinder downwardly, will retract the lingers 4l of the unlocking niernber from 'the latch 3.1, whereby the latch is disconnected from the unlocking member and cylinder. Vlhen the cylinder slid inwardly or upwardly within the case, against the tens-lon of the spring 44, the unlocking member 40 is moved to bring the lingers 4l in overlapping relation with the latch, at opposite sides thereof, whereby the turning of the cylinder will turn the latch. 3l so that the shackle can be released d opened. rlhe unlocking member 40 can also be moved away from the key cylinder, as seen in 3, to disconnect the unlocking member and key cylinder, for turning the key cylinder to key changing position, by the means of a proper combination changing key, as hereina vter set forth.

The cylinder 35 can only be turned when it is slid into the case, inasmuch pins or screws 46 which are screw-threaded or otherwise secured in the cylinder project from the shoulder 37 of the cylinder to enter the notches or recesses 47 in the block 14, when the cylinderI is slid outwardly and seated in the block 14. Therefore, the cylinder must be slid inwardly to withdraw the pins or screws 46 from the notches 47, before the cylinder can be turned. rlhe pins or screws 45 and notches 4? are di ametrically opposite to one another so as to restrain the cylinder against turning movement in either of two reverse posit-ions.

The cylinder 35 has a lont-gitudinal` key slot 48 for receiving the k y, and the slot can be of diiierent cross sections so as to require keys of correspending` cross sect-ions, as well understood in the art.

ln order to prevent the cylinder from be ing slid inwardly so that it can be turned7 without the use of a proper key, a plunger or member 49 is slidable in the block 14 and connected to the cylinder to slide with the cylinder, so that when said plunger 1s prevented from sliding by the tumblers, the

cylinder cannot be slid into the case to connect the unlocking' member 40 with the latch and to turn said latch.' The upper end of the plunger 49 is screw-threaded or otherwise secured in a yoke 50 which has a swivel connection with the cylinder, said yoke loosely embracing the neck or reduced end portion 38 of the cylinder and being retained in connection with the cylinder by the nut 39. rlhe plunger 49 must therefore slide with the cylinder, and if the plunger cannot be slid, it will prevent the cylinder from loeing` slid, and the proper key must therefore be used before the cylinder can be shoved inwardly within the case'and turned to'open the lock.

rlhe sliding movement of the plunger 49 is controlled by the tumblers, 'as will presently appear'. Bores are drilled in the block 14 to intersect the holes or openings in which the plunger and cylinder are disposed, thereby providing the apertures 5l in the partition of the block between the plungerand cylinder, the openings 52'in the block at the opposite side of the plunger, and the recesses 53 at the opposite sideof the cylinder. Th plunger49 has the openings 54 to register or aline with the apertures 5l and openings 52, and the cylinder 35 has the radial openings or holes 55 to register or valine with either the apertures 5l or the recesses 53 when the cylinder is turned to reversed positions. Tumbler pins 56 are slidable in the openings 54 vof the plunger 49 and are of a length equal to the thickness or width of the plunger, so 'that said pins can be located e'n tirely within the plunger, to 'permit the plunger to slide. The tumbler pins 56 are slid into the apertures 5l and opening 55, when free to do so, by means of coiled springs 57 disposedin the openings 52, said Tumbler balls`59 are provided to be disposed in the apertures 51, and tumbler balls 60 are provided to be disposed in the opening 55 and recesses 53, and enable various combinations to be set up requiring different keys.

The recesses 53 provide magazines or receptacles for the vtumbler balls 60, inasmuch as when the cylinder` is turned to bring the openings 55 in registration with the recesses or magazines 53, the balls 60 can be moved into and out of the openings and recesses 63, for selecting ditlerent com 'nations of tumbler balls, aswill hereinafter more fully appear. Coiledsprings 61 are disposed in the recesses 53 behind the balls to move said balls into the openings 55, and said springs have the caps or end members 62 to contact with the balls 60 and cylinder 35.

The key 63 hasits edge 64 so cut or formed as to correspond with the numbers ot tumbler balls 60 carried by the key cylinder, and said key has a shoulder or lug 65 to abut the outer or lower end of the cylinder to slide the cylinder inwardly. rlhe key 63 is the lock opening or operating key, and the combination changing key 66 has its edge 67 cut or formed to correspond.

with the edge 64 ot the primary key 63, the combination changing key 66 also having a shoulder or lug 68 to contact with the cylinder and move it into the case.

The distinction between the primary or lock opening key and combination changing key is the provision on the key 66 ot an eitension 69 to project beyond the inner or upper end ot the cylinder 35, as seen in Fig. 3, to contact with the unlocking member so as to move said member out of engagement with the clutch pins 42, and permitting the cylinder to be turned independent of the unlocking member, for changing the combination.

The lug` 17 has a stop 70 for the contact of the yoke so as to limit the inward movement of the cylinder 35.

Then the lock is set for one combination of tumblers, a selected number of balls 60 of the several sets are disposed in the openings of the cylinder, while the other balls are retained in the magazine recesses With the parts in locked position, the shackle 31 or its equivalent is in closed position, with the latch 31 eifigaging` in the notches 32 of the shackle. rllhe key cylinder is moved outwardly and seated in the block 14 with the openings 55 registering with the apertures 51, so that the springs 57 push the tumbler pins 56 into the apertures 51 and openings 55, until the innermost balls 60 carried by the cylinder 35 contact with the inner ends of the holes 55, as seen in Fig. 1. The unlocking member 40 is moved from the latch 41 by the spring 44, and the pins 56 projecting out ot the plunger 49 into Leraars the block 14 and cylinder 35 will prevent the cylinder and plunger from being slid, as well as preventing the cylinder trom turning, Also, the pins or elements 46 ot the cylinder seating in the notches 47 will prevent the cylinder from turning.

lilhcn the proper unlocking or operatinf key is inserted in the slot et the cyl der, the balls 66 are forced toward the neriphery ot the cylinder, thereby bringi the balls into the apertures 51, and moving the pins 56 into the plunger 49, as seen in 2. This will set the tun'iblers so that the cylinder can slid iif'ardly and turned. The key 63 then pushed A.to the ase, so that the lug` or shoulder 65 slides the cylinder inwardly, the iilunger 49 being to move with the cylinder, and the pins 4 being withdrawn trom the notches c inward movement oit the cylinder will theretore release the cylinder 'for turing movement, and the fingers 41 ot the unlocki member 40 will overlap the opposite edges ot the latch 3l. rllhen, by turning' the cylindcr, the member 40 is turned (clock-wisc as seen in Fig. 5) so as to turn the latch 31, against the tension oit the spring 35', to relea-se the shackle 21. The spring 30 will therefore separate the shackle and case, the screw 26 and collar 23 limiting` such separation ot the parts, and the short limb ot the shackle having been withdrawn from the case, will permit the shackle and case to be turned relatively to one another about the axis of the longer limb oit the shackle. The turning` movement oii the cylinder `is limited inasmuch as the unlocking;` member 40 has but a limited turning movement in the case with the latch 31, so that the cylinder can only be turned through a small angle. Then the lock is opened. the corresponding end of the latch 31 bears against the longer limb ot the shackle, thereby retaining the latch in releasing position, even though the cylinder 35 is turned back to locking position and the key removed. The lock can therefore be snapped shut or closed, by sliding the shackle into the case, inasmuch as the latch 31 will spring` or snap into the notches 32 by the action ct the spring` 35. The lock thus performs the usual duty ot' an ordinary lock.I and cannot be picked open or unlocked without the use ot the proper key.

ln order to change the tumbler combina tion, the combination changing key 66 must be used and such key must correspond with the operatingor unlocking` key 63, so that when the key 66 is inserted in the cylinder, the tumbler pins 56 are shoved back into the plunger 49, the same as when the key 63 is inserted, to permit the cylinder and plunger to be slid into the case. The eitension 69 ot the key will project beyond the inner end of the cylinder, as seen in llig. 3

lill@ Cil thereby moving the unlocking member 40 away from the cylinder, so as to open the clutch connection between them, the recess l5 of the member receiving the pin e3 to retain the member i0 in concentric relation with the cylinder. By pushing the key 66 into the case, the shoulder or lug 68 moves the cylinder inwardly, and the unlocking member Zl() is moved ahead of the cylinder to keep said unlocking member and cylinder spaced apart. Then, when the screws or elements have been removed from the notches el", the cylinder can be turned `Enrough an angle of i60 degrees to bring the openings 55 into registration with the recesses 53, as seen in Fig. Then, when the combination changing key 66 is withdrawn from the cylinder', the spring lll presses the unlocking member against the clutch pins d2, and the cylinder 35 and plunger i9 are moved downwardly or outwardly. rlhe unlocking member l0 remains seated on the pins 42, inasmuch as the cylinder having been turned through one-half of a revolu tion.. will remove the pins a2 from registratien with the notches d8. rlhe unlocking member therefore remains disconnected from the cylinder, excepting that the spring presses the unlocking member against the clutch pins l-Q. 'When tne key 66 has been withdrawn from the cylinder, the springs 6l force the balls 60 into the openings 55 of the cylinder, as seen in F ig. l, and the lock is thus prepared for the reception of the new operating or unlocking key. 'ien the new key is inserted, as shown in dotted lines in Fig. a, the balls 60 are forced into the recesses 55, according to the formation of the edge of the key, and the new key thus selects the numbers of balls 60 of the several sets which are to be carried around by the cylinder, the other balls 60 being retained in the recesses 56. The cylinder is then turned by the new key, after the cylinder is pushed into the lock to remove the screws i6 from the notches i7 to permit the cylinder to turn, so that the balls 60 selected by the new key remain in the openings 55 of the cylinder, while the surplus balls 60 ejected from the cylinder by the new key, remain in the recesses 56. After the cylinder has been turned by the new key to bring the openings 55 adjacent to the apertures 5l, the clutch pins i2 will be moved into registration with the notches e3, so that the spring il automatically moves the unlocking member Ll() into connection with the cylinder, thereby again connecting the unlocking member and cylinder so that the cylinder cannot be turned to combination changing position without the use of a combination changing key, corresponding with the new key that was inserted for changing the combination. Accordingly, when the new key is inserted, the new coining key lor operating or opening the lock;-l

and the keys 63 and 66 are therefore useless, unless it is desired later on to change the lock back for the use of the keys 63 and 66. i

@ne or more of the keys 63 can be prof vided for one or more of the locks, and the combination changing key 66 can remain in the possession of an authorized person or may be kept in safe keeping, so that in the event of the loss of one or more of they keys 63 or the possession of operating keys by discharged employees, strikers, or other unauthorized persons, the combination changing key can be used for setting one or more of the locks to combination changing position, and a new key can then be inserted and turned, whereupon the old keys are rendered useless for opening the locks. In this way, by the single insertion, turning movement and withdrawal of the combina'- tion changing key, and the insertion and turning movement of the new key, the lock is immediately and quickly changed to require the new key for opening the lock, rendering the previous or old operating key entirely' useless for opening the lock. Therefore, instead of substituting the lock or locks, as a protection against persons having keys, whether rightfully or wrongfully in possession thereof, the present lock is such that the lock itself can be changed conveniently and quickly to render the old keys inoperative and to require the newly selected key. lt is thus only necessary to change keys in` stead of changing locks, and several sets of' keys can be used for making key changes periodically or whenever circumstances require or warrant such key changes. One lock can thus be used for a large number of different keys, by making key changes through the medium of the combination changing keys, and identically the same lock can he used for different keys, inasmuch as f combinations.

that is to ...be used 'tor opening the. Blank operating and combination keys vcan :be .provided so that neiv l K 'be made by the user or owner ot' ty e `Without .others having any knowledge the .particular 'key required ttor opening t ie lock. 'llhe keys ttor each lock must L i or a cross-section to correspond Witii cross-section of the key slot 4&8 ot trie cylinder, 'thereby/providing other variations in 'the keys .for dierent locks.

Having thus describedthe invention, what is claimed as .new is l. lit a lock, a key operable member i 'able .to operative Viirdkey chengingposi .tumbler inembersto :be carried by said key .operable xmember, means 'for receiving tlie `surplus tumbler .memlgiers Yfrom the l, op-

erable 4member when an operating ke is inserted With the key operable member in key `changing position, means cooperable Withthe tumbler members carried by the Lkeywoperable Amember when said key oper- =able member is inoperative position to pre- -vent Avsaid key operable Amember being opyerated.ercepting by the .previously selected operating key, and releasable means tor pre-- yven-ting the `key 4operable member being lmoved to key changing position in combinalrtion with a combination changing key insertable infsaid key operable member to controltheilast named means and tumbler i bers for movingthe key operable member to combi-nation changing position.

2. In a lock, abody, a key operable ineinloer movable in .saidbody to operative and l key changing positions and having openings,

- members when a key is insertedin the .the body :having y.recesses for the registravtion of said openings in the key changing position ot said member, tumbler members tofbeidisposed in said openings and recesses, said recesses receiving` the surplus tumbler key op- =erable member inthe key changing position thereof, means in the body cooperable with said openings of the key operable member `and ltumblermembers therein, in the operative position of the key operable member, for preventing` key operable nieii'ilier 4being operate-d excepting by the previously selected key, and releasable means tor pren venting the key operable niemeer Ytrom being moved to key changing position, in combi- Y nation Awith a. con'ibination changing key iiisertable in said key operable member to control the last named means and tumbler mein y bers ytor moving the key operable member to combination changing position.

ln a lock, a key operable member movable to operative and key changing positions, tumbler members to be carried by said l1cy operable member, means 'for receiving the surplus tumbler members from the key f operable member when key is inserted with the key operable member in key changing' riosition, means coope ivitii the tuin members carried by the operable mei when the key operable member is .in operat i position to prevent said key operable membe being operated excepting by thev previ selected key, and a member having cr,-k en connection with the key operable member and limited in its movement to prevent the operable member being moved to key cha` ing position, in combination with a oon'ibiiiation changing key corresponding with s en previously selected key and having a porY on arranged to disconnect tbe last named mei-,n bei' and key operable inhiber.

ln a lock, a key cylinder arranged to be turned to operative. and key changing positions, tumbler members to be carriedA by said cylinder in dil'llercnt seleoteeL coinbina'tions, means tor receiving the surplus tumbler members trom said cylinder when a key is inserted with the cylinder y changing position, means cooperable with the tumbler members carried by said cylinder when the cylinder is in operative position to prevent said cylinder trom being operated excepting by the previously selected key, and releasable means tor preH venting the cylinder from being turned to key changing position, in combination i a combination changing key corresponding i With the aforesaid selected key to tui-n the key cylinder and release the last named in ans.

ln a lock, a body, a key cylinder rota table therein to operative and key cliai'igiiig positions, and having openings, the body having recesses t'or the registration oi' said openings in the key changing position oil cylinder, tumbler members to be disposed iii said openings and recesses, said recesses receiving the surplus tumblers when a key is inserted in the cylinder in the key changing` position thereot, means in the bo l cooperable with said ojgienings and tlie tui lilo members therein, in the operat ve position o the cylinder, tor preventing the ciinder being operated excepting by the` previcosi).Y selected key, and rele sable means tor preventing the cylinder Yfrom being turned to key changing position in combinati' l a combination changing key correspoiif4 :l with said previously selected key to the cylinder and release the last nain means.

6. ln a lock, a key operable iiiei'iler iwi able to operative and key chan tions, tumbler members to be car key operable member, means the surplus tumbler members ti. operable member when an oper i, is inserted with the k operable in key changing p sition, moans cooper, With the tumbler members ca d by JE L iisyis member is in operative position to prevent said key operable member being operated excepting by the previously selected operating key, and means for preventing the key operable member being moved to key changing position, in combination with a combination changing key corresponding with the previously selected operating key tor moving the key operable member and cooperable with the last named means to release the key operable member 'tor movement to key changing position.

7. ln a lock, a body, a key operable member movable in said body to operative and key changing position and having openings, the body having recesses :tor the registration of said openings in the key changing position `oi: said member, tumbler members to be disposed in said openings and recesses, said recesses receiving the surplus tumbler meinbers when a key is inserted in the key operable member in the key changing position thereof, means in the body cooperable with said openings oi the key operable member and tumbler members therein, in the operative 'position ot the key operable member, for preventing said key operable member being operated excepting by the previously selected key, and means `for preventing the key operable member being moved to key changing position, in combination with a combination changing key corresponding With the previously selected key to operate the key operable member and cooperable With the last named means for releasing the key operable member for n'ioveinent to key changing position.

S. ln a lock, a key operable member movable to operative and key changing positions, tumbler members to be carried by said key operable member, means tor receiving the surplus tumble members from the key operable member when a key is inserted rith the key operable member in key changing position, mea-ns cooperable With the tumbler members carried by the key operable member when the key operable member is in operative position to prevent said key operable member being operated excepting by the previously selected key, and a member having a clutch connection With the key operable member and limited in its movement to prevent the key operable member being moved to key changing position, in combination With a combination changing key corresponding with said previously selected key for 'operating the key operable member and oooperable With the last named member to disconnect said last named member a nd key operable member for the movement ot the key operable member to key changing position.

0. In a lock, a key cylinder arranged to be turned to operative and key changing positions, tumbler members to be carried by said cylinder in different selected combinations, means :tor receiving the surplus tumbler members trom said cylinder when a key is inserted with the cylinder in key changing position, means cooperable with the tumbler members carried by said cylinder When the cylinder is in operative position to prevent said cylinder from being operated excepting by the previously selected key, and means for preventing the cylinder from being turned to key changing position, in combination With a combination changing key corresponding vvith the aforesaid selected key to turn the cylinder and cooperable with the last named means to free the cylinder for movement to key changing position.

10. In a lock, a body, a key cylinder rotatable therein to operative and key changing positions, and having openings, the body having vrecesses for the registration of said openings in the key changing position of the cylinder, tumbler members to be disposed in said openings and recesses, said recesses receiving the surplus tumbler members When a key is inserted in the cylinder in the key changing position thereof, means in the body cooperable With said openings and the tumbler members therein, iny the operative position of the cylinder, for preventing the cylinder being operated excepting by the previously selected key, and means for preventing the cylinder from being turned to key changing position, in combination With a combination changing key corresponding with said previously selected key 'for operating the cylinder and having a portion cooperable with the last named means to free the cylinder for movement to key changing position.

11. 1n a lock, a body, a key operable member movable in the body to operative and key changing positions, and having openings, the body having recesses for the registration ot said openings in the key changing position or" said member, tumbler members to be disposed in said openings and recesses, said recesses receiving the surplus tumbler members from said key operable member When a key is inserted in the key operable member in the key changing position thereof, means in the body cooperable vvith said openings and tumbler membeis therein When the key operable member is in operative position to prevent said key operable member being Aoperated excepting by the previously selected key, and a member having a clutch connection with the key operable member and limited in its movement to prevent the key operable member being moved to key changing position in combination With a combination changing key corresponding With such previous selected key and having a portion arranged to disconnect the last named member and key operable member.y

e bo fk, ene ot seid oeninos in *l*e ker' chanoine' vesi- ,In t y. Jpg i@ 1 i tio by ordi@ i@ In: tion or said member, tumbler members to be l n said openings and recesses, said fing the surnlus Y' imbler member v i ble mem i cov and in tively to the bony to pret l op Lable 'n ember moved to key el no; position in combination Wi'thacoml tion Chano* key respond ing with such previously selecta` key tor operating key operable member and hoy ing an extension arranged to disconnect the last nai'ned member a.h d key operable memH bei' for the movement oi the xy operable member to key changing; L ion in lock7 a key cyhnder arranged to be turned to operative and key chanfingl positions, tumbler members to carried by said cylinder means for receiving` the surplus tumbler members from the cylinder" when a key is inserted With the cylinder in key changing position, means cooperable with the cylinder and tumbler members carried thereby Vwhen the cylinder is in operative position to prevent the cylinder' being` operated exceptingl by the previously selected key, and a member' having` a clutch connection with the cylinder and limited in its turning; movement to prevent the cylinder being turned to key changingposition eze cepting by a combination changing` key corresponding1 with such previously selected key and having; a portieri arranged to discon nect the last named member and cylinder.

14;. ln a lock, a kev cylinder arranged to be turned to operative and .key changing' positions, tumbler member to be carried by said cylinder, means for receiving the surplus tumbler members trom the cylinder when a. key is inserted with the cylinder in key changing` position, means cooper-able with the cylinder and tumbler members carl thereby when the cylinder is in operative position to prevent tne cylinder being operated excepting` by the previously selected key, and a member having` a clutch connection with the cylinder and limited in its turning movement to prevent the cylinder being; turned to key changing position, in combination with a combination changing key corresponding -with suoli previously selected key for operating the cylinder and la MS having an extension arranged to Contact with the i ed mem'ier roi" disconnecting se 1. l nember and key opera ble menine turning movemeniv or the cylinder ringing position.

i a lock, a body` a key cylinder ioin the body to operative and lf ji mg positions, and h earringv openings, ine o recesses tor the registration of when the cylinder is in lA tion, imbler members recesses rec f' the surpi 'i m said ope,u es when ll' nder in theA keg,"

means in the 530 1, y L, n', 1, i rein ien tire cylinder position to prever t said cylinder -ated excepting' by the previously sel cred key, and a membe having a. clutc i conn ction with the cylinder and limited in it movement relatively to the body to prevent the cylinder being turned to key chang;- osition, in combination with a combination changing` key correspondinev with suoli prei/'icusly selected key and having a portion arranged to disconnect the last Y iber and cylinder.

lock body, a key cylinder r tatable inthe body to operative and key cha positions, and having openings, the .non i recesses for the registration ot id o ennirfs when the cylinder is in key if; position, tumbler members in said openings said recesses receiving the surplus f, nbler members from said openings when a key is inserted in the cylinder in the key chan g g position thereof, means in the body cooperable with said openings and 'tumbler memi therein when the cylinder is in operative position to prevent said cylinder being operated excepting bv the previously select ed key, and a member havinga clutch conwith the cylinder and limited in its turning' movement relatively to the body to prevent the cylinder being' turned to key chaine;ing` position, in combination With a combination olianfging,` key corresponding; with the previously selected key for operating' the cylinder and liaving an extension to contact with the last named member' Jfor disconnecting;v said last named member and cylinder so that the cylinder can be turned to key changing position.

il?. in a lock, a key operable member movable to operative and key changing positions, tumbler means for preventing the operation or said member When in operative position ezrcepting)` by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and means tor pieventing` the movement oi' said member from operative to key changing position and controllable by a diderent key inserted in said member to release said mem- (i Il ber for movement to key changing position.

18. In a lock, a key operable member movable to operative and key changing positions, tumbler means for preventing the operation of said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and means for preventing said member from being moved from operative to key changing position, in combination with a combination changing key corresponding with the required key for operating said member and cooperable with the last named means for releasing said member for movement to key changing position.

19. In a lock, a body, a key operable member movable in the body to'operative and key changing positions, tumbler means in said body and member for preventing the operation of said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and means for preventing said member being moved from operative to key changing position and controllable by a different key inserted in said member to release said member for movement to key changing position.

20. In a lock, a body, akey operable member movable in the body to operative and key changing positions, tumbler means in said body and member for preventing the operation of said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and means for preventing said member from being moved from operative to key changing position, in combination with a combination changing key corresponding with the required irst named key for operating said member and cooperable with the last named means to release said member for movement to key changing position.

21. In a lock, a key cylinder movable to operative and key changing positions, tumbler means for preventing the operation of said cylinder when in operative position excepting by a proper key and adapted to be changed, when said cylinder is in key changing position, to require a new key, and means for preventing said cylinder being moved from operative to key changing position and controllable by a different key inserted in said cylinder to release said cylinder for movement to key changing position.

22. In a look, a key cylinder movable to operative and key changing positions, tumbler means for preventing the operation of said cylinder when in operative position excepting by a proper key and adapted to be changed, when said cylinder is in key changing position, to require a new kev. and means for preventing said cylinder from being moved from operative to key changing position, in combination vwith a combination changing key corresponding with the required iirst named key for operating said cylinder and cooperable with the last named means to release said cylinder for movement to key changing position 23. In a lock, a body, a key cylinder mounted for turning movement in the body to turn to operative and key changing positions, tumbler means in said body and cylinder for preventing the operation of said cylinder when in operative position excepting by a proper key and adapted to'be changed, when said cylinder is in key changing position, to require a new key, and meansfor preventing thev cylinder from being turned in the body from operative to key changing position and controllable by a different'key inserted in said cylinder to release the cylinder for movement to key changing position.

24:. In a lock, a body, a key cylinder mounted for turning movement in the body to turn to operative and key changing positions, tumbler means in said body and cylinder for preventing the operation of said cylinder when in operative position excepting by a proper key and adapted to be changed, when said cylinder is in key changing position, to require a new key, and means for preventing said cylinder from being turned from operative to key changing position, in combination with a combination changing key corresponding with the required first named key for operating the cylinder and cooperable with the last named means to release the cylinder lor movement to key changing position. y v

25. In a lock, a key operable member movable to operative and key changing positions, tumbler means for preventing the operation of said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and a member having a clutch connection with the key operable member and limited in its movement to prevent the key operable member being moved to keyy changing position and controllable to release the key operable member for movement to key changing position. d l

y26. In a lock, a key operable member movable to operative and key changing positions, tumbler means for preventing the operation of said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and a member having a clutch connection with the key operable member and limited in its movement to prevent the key operable member being moved to key changingl position, in combination with a combination changing LIU key corresponding With the required tiret named key for operating said member and cooperable With the last named member to disconnect it from the key operable member for the movement of the key operable member to key changing position.

27. In a lock, a body, a key operable inember movable in the body to operative and key changing positions, tumbler means in said body and member for preventing the operation of said member When in operative position excepting by a proper k y and adapted to be changed, when said member is in keg, changing position, to require a new key, and an unlocking member having a clutch connection With the key operable member and limited in its movement relatively to the body for preventing the key operable member from being moved to key changing position and controllable to disconnect said members 'for releasing the key operable member for movement to key changing position.

28. In a lock, a body, a key operable member movable in the body to operative and key changing positions, tumbler means in said body and member tor preventing the operation of said member when in operative position excepting by a proper' key and adapted to be changed, when said member is in key changing position, to require a new key, and an unlocking member having a clutch connection With the key operable member and limited in its movement relatively to the body for preventing the key operable member from being moved to key changing position, in combination with a combination changing key corresponding with the required iirst named key ttor operating said member and having a portion to disengage the unlocking member trom the key operable member Jfor the movement ot the key operable member to key changing position.

29. In a lock, a key cylinder rotatable to operative and key changing positions, tumbler means for preventing the operation oi said cylinder when in operative position eX- cepting by a proper key and adapted to be changed, when the cylinder is in key changing position, to require a new key, and a. member having a clutch connection with said cylinder and limited in its turning movement to prevent the cylinder being turned to key changing position and controllable to release the cylinder tor movement to key changing position.

30. In a` lock, a key cylinder rotatable to operative and key changing positions, tumbler means tor preventing the operation ot said cylinder when in operative position cX- repting by a proper key and adapted to be rhanged, When the cylinder is in key changing position, to require a new key, and a member having a clutch connection with said cylinder and limited to its turning movement to prevent the cylinder being turned to key changing position, in combination with a combination changing key corresponding with the required iirst named key for operating said cylinder and having a portion to disengage said member trom the cylinder for the movement ot the cylinder to key changing position.

3l. ln a lock, a body, a key cylinder rotatable in the body to operative and key changing positions, tumbler means in said body and cylinder tor preventing the operation ot the cylinder when in operative position excepting by a proper key and adapted to be changed, When said cylinder is in key changing position, to require a new key, and an unlocking member having a clutch connection with said cylinder and limited in its turning movement relatively to the body 'for preventing the cylinder being turned to key changing position, and controllable to disconnect said member trom the cylinder to release the cylinder ior movement to key changing position.

32. lin a lock, a body, a key cylinder rotatable in the body to operative and key changing positions, tumbler means in said body and cylinder tor preventing the operation oit the cylinder when in operative position excepting by proper key and adapted to be changed, when said cylinder is in key chang'ng position, to require a new key, and an unlocking member having a clutch connection with said cylinder and limited in its turning movement relatively to the body 'tor preventing the cylinder being turned to key changing position, in combination with a combination changing key corresponding With the required first named key for operating said cylinder and having a portion to disengage said member from the cylinder to release the cylinder tor movement to key changing position.

33. ln a lock, a body, a key cylinder mounted in the body for rotary and axial movements, tumbler means in said body and cylinder for preventing the movement ot the cylinder excepting by a proper key, a latch, and an unlocking member movable With the cylinder to'be moved axially with the cylinder into and out of connection with the latch and to be turned with the cylinder tor operating the latch, said unlocking member being arranged to be disconnected from said cylinder' by a key inserted in said cylinder.

34. In a lock, a body, a key cylinder mounted in the body for rotary and axial movements, tumbler means in said body and cylinder tor preventing the operation olf said cylinder excepting by a proper key, a latch mounted :tor turning movement, and unlocking means arranged tor either connecting the cylinder with the latch by the arial movement ot the cylinder to turn the MIU latch With the cylinder or to be disconnected from the cylinder by a key inserted in said cylinder.

35. In a lock, a body, a cylinder mounted in the body for rotary and axial movements, tumbler means in the body and cylinder for preventing the operation of said cylinder excepting by a proper key, a latch, an unlocking member having a clutch connection With the cylinder, and spring means for holding said unlocking member and cylinder in engagement and for moving the unlocking member out of engagement from the latch, said unlocking` member being movable axially with the cylinder to engage the latch and to move the latch by the turning movement of the cylinder.

36. In a lock, a body, a key cylinder mounted in the body for turning and axial movements, tumbler means in the body and cylinder for preventing the operation of said cylinder excepting by a proper key, a pivot pin carried by the body, a latch mounted to turn on said pin, an unlocking member having a clutch connection With the cylinder and movable axially With the cylinder to engage the latch, and spring means for separating the unlocking member and latch and holding the unlocking member` and cylinder in engagement, the unlocking member being engageable With said pin When said unlocking member is disengaged from the cylinder.

37. In a lock, a body, a key operable member slidable in the body, a second member sldable in the body parallel with the key operable member, tumbler pins in the second member, said members being connected to move in unison, the body having openings to receive said pins for preventing the movement of said members, and tumbler members in the key operable member to register With said openings for moving said pins into the second member When the required key is inserted in the key operable member.

38. In a lock, a body, a key operable member slidable in the body, a second member slidable in the body parallel With the key operable member, said members being connected to move in unison, said members and body having openings to register, tumbler pins in the second member to move into the openings of the body, and tumbler members in the openings of the key operable member and body for moving said pins into said second member When the required key is inserted in the key operable member.

39. In a lock, a body, a key cylinder mounted in the body for rotary and axial sliding movements, a member slidable in the body and having a swivel connection With the cylinder to move slidably with the cylinder, tumbler pins in said member to engage in the body for preventing sliding movement of said cylinder and member, and

tumbler members in said cylinder and body to move said pins into said member When the required key is inserted in the cylinder.

40. In a lock, a body, a key cylinder mounted in the body for turning and axial sliding movements, a member slidable in the body spaced from said cylinder and having a swivel connection with said cylinder to slide With the cylinder, said cylinder, member and body having openings to register, tumbler pins in the openings of said member to enter the openings in the body for preventing sliding movement of said cylinder and member, and tumbler vmembers in the openings of said cylinder and body for moving the pins into said member when the required key is inserted in the cylinder. i

fil. In a lock, a body, a key cylinder rotatable and slidable axially in said body, a member slidable in the bodv and having a swivel connection With the cylinder to slide with the cylinder, tumbler pins in said member and engageable in the body to prevent sliding movement of said cylinder and member, tumbler members in the cylinder and body for moving said pins into said member When the required key is inserted .in the cylinder, a latch, and an unlocking member movable with the cylinder to be slid with the cylinder into connection with the latch for theoperation of the latch bythe turning movement of the cylinder.

42. In a lock, a body, a key cylinder slidable axially in the body and rotatable therein to operative and key changing positions, a plunger slidable in the body andhaving a swivel connection with the cylinder to slide With the cylinder, tumbler pins in the plunger engageable in the body to prevent sliding movement of said cylinder and plunger, tumbler-.members in the cylinder and body and cooperable with said pins when the cylinder is in operative position for moving the pins into the plunger When the required key is inserted in the cylinder. said tumbler members being adapted to be changed `When the cylinder is in key changing position so as to require a neivkey, a latch, andan unlocking member having a clutch connection With the cylinder to be slid With the cylinder into connection with the latch for moving the latch by the turning movement of the cylinder, said unlocking` member beinglimited in its movement relatively to the body to prevent the cylinder being turned to key changing position, and said unlocking member being controllable to disengage it from the cylinder to permit the cylinder to be turned to key changing position.

43. In a lock, a body, a key cylinder slidi able axially in the bodv and rotatable therein to operative and key changing positions, a plunger slidable in the body and having a swivel connection with the cylinder to slide with the cylinder, tumbler pins in the plunger engageable in the body to prevent` sliding movement of said cylinder and plunger, tumbler members in the cylinder and body and coopera ile with said pins when the cylinder is in operative position tor moving the pins into the plunger when the required key is inserted in the cylinder, said tumbler members being adapted to be changed when the cylinder is in key changing position so as to require a new key, a lat-ch, and an unlocking member having a clutch connection with the cylinder to be slid with the cylinder into connection with the lat fh 'lor moving the latch by the turning movement oi' the cylinder, said unl-icking member being limited in its movement relatively to the body to prevent the cylinder being turned to key changing position, in combination with a combination changing key corresponding with required key to operate said cylinder and having an extension to move the unlocking member out of connection with the cylinder to release the cylinder ior movement to key changing position.

ed. in a lock, a body, a key cylinder slidable axially with the body and rotatable therein to operative and key changing positions, a plunger slidable in the body and having a swivel connection with the cylinder to slide therewith, tumbler pins slidable in the plunger and engageable in the body to prevent sliding movement of said cylinder and plunger, the cylinder and body having openings, tumbler members in said openings to cooperate with said pins when the cylinder is in operative position for moving said pins into the plunger when the required key is inserted in the cylinder, the body having recesses with which the openings of the cylinder register when the cylinder is turned to key changing position, said recesses receiving surplus tumbler members from the cylinder when a key is inserted in the cylinder with the cylinder in key changing position, a latch, an unlocking member having a clutch connection with the cylinder to be moved with the cylinder into connection with the latch for moving the latch by tne turning movement oi" the cylinder, and spring means for moving said unlocking` member out of connection with the latch and tor holding the unlocking membe1 in engagement with the cylinder, said unlocking member being limited in its turninO movement to prevent the cylinder being turned to key changing position unless said unlocking member is disengaged `trom the cylinder to release the cylinder.

45. In a lock, a body, a key cylinder slidable axially with the body and rotatable therein to operative and key changing positions, a plunger slidable in the body and having a swivel connection with the cylinder the Erst named,

naisfie to slide therewith, tumbler pins slidable in the plunger and engageable in the body to prevent sliding movement oi said cylinder and plunger, the cylinder and body having openings, tumbler members in said openings to cooperate with said pins when the cylinder is in operative position tor moving said pins into the plunger when the required key is inserted in the cylinder, the body having recesses with which the openings ot' the cylinder register when the cylinder is turned to keyv changing position, said recesses receiving surplus tumbler members from the cylinder when a key is inserted in the cylinder with the cylinder in key changing position, a latch, an unlocking member having a clutch connection with the cylinder to be moved with the cylinder into connection with the latch tor moving the latch by the turning movement ot the cylinder, and spring means for moving said unlocking member out ot' connection with the latch and liolding the unlocking member in engagement with the cylinder, said unlocking member being limited in its turning movement to prevent the cylinder being turned to key changing position unless said unlocking member is disengaged 'from the cylinder to release the cylinder, in combination with a combination changing key corresponding with the previously selected required key to operate the cylinder and having an extension to contact with and move the unlocking member out of engagement with the cylinder to release the cylinder tor :g vement to key changing position.

lio. .lin a lock, a key operable member movable to operative and key changing positions, tumbler means 'for preventing the operation ot said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position., to require a new key, and means tor normally preventing said member being moved to key changing position and controlled by a diderent key inserted in said member to permit said member to be moved to key changing position.

el?. ln a lock, a body, a key operable member movable in the body to operative and key changing positions, tumbler means in said body and member 'igor preventing the operation oit said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, to require a new key, and means for normally preventing said member being moved to key changing position, in combination with a combination changing key insertable in said member and arranged to control the last named means to release said member for movement to key changing position.

e8. ln a lock, a key cylinder adapted to be turned to operative and key changing posillO tions, tumbler means 'for preventing the 'operation of said cylinder when in operative position excepting by a proper key and adapted to be changed, when the cylinder is in key changing position, to require a new key, and means for normally preventing said cylinder being turned to key changing I position and controlled by a different key inserted in said cylinder to permit said cylinder to be turned to key changing position.

49. In a lock, a body, a cylinder mounted for turning movement in the body to turn to operative and key changing positions, tumbler means in said body and cylinder for preventing the operation ot' said cylinder when in operative position excepting by a proper key and adapted to be changed, when said cylinder is in key changing position, to require a new key, and means for normally preventing said cylinder being turned to key changing position, in combination with a combination changing key insertable in said cylinder and arranged to control the last named means to release the cylinder for turning movement to combination changing position.

50. In a lock, a key operable member movable to operative and key changing positions, tumbler means for preventing the operation of said member when in operative position excepting by a proper key and adapted to be changed, when said member is in key changing position, by the insertion of a new key so as to require such new key when said member is returned to operative position, means operated by said member, and means for normally preventing the movement of said member to key changing position and controlled by a diiferent key inserted in said member to release said member for movement to key changing position and to disconnect the second named means from said member.

5l. In a lock, a body, a key operable member movable in the body to operative and key changing positions, tumbler means in said body and member for preventing the operation of said member when in operative position excepting by a proper key and adapted to be automatically changed, when said member is in key changing position, by the insertion of a new key so as to require such new key for operating said member after it is returned to operative position, means operated by said member, and means for normally preventing the movement of said member to key changing position, in combination with a combination changing key insertable in said member and arranged to control the second and third named means for disconnecting the second named means from said member and releasing said member for movement to key changing position.

52. In a lock, a key cylinder adapted to be turned to operative and key changing positions, tumbler means for preventing the operation of said cylinder when in operative position excepting by a proper key and adapted to be automatically changed, when said cylinder is in key changing position, by the insertion oi a new key so as to require such new key to operate the cylinder after the cylinder is returned to operative position, and a member connected to said cylinder to turn therewith and limited in its turning movement to prevent the cylinder being turned to key changing position, said member being adapted to be disconnected from said cylinder by the insertion of a different key in the cylinder to permit the cylinder to be turned to key changing position.

53. In a lock, a body, a key cylinder mounted for turning movement in the body to turn to operative and key changing positions, tumbler means in the body and cylinder for preventing the operation of said cylinder when in operative position excepting by a proper key and adapted to be automatically changed, when said cylinder is in key changing position, by the insertion of a new key so as to require such new key to operate the cylinder after it is returned to operative position, and a member connected with the cylinder to turn therewith and limited in its turning movement to prevent the cylinder being turned to key changing position, in combination with a combination changing key insertable in the cylinder and arranged to disconnect said member from the cylinder to permit the cylinder to be turned to key changing position.

54;. In a lock, a key operable member movable to operative and key changing positions, and means for normally preventing said member being moved to key changing position, in combination with a combination changing key insertable in said member and cooperable with said means to release said member for movement to key changing position.

55. Ina lock, a rotatable key cylinder adapted to be turned to operative and key changing positions, and means for normally preventing said cylinder being turned to key changing position, in combination with a combination changing key insertable in said cylinder and cooperable with said means to release the cylinder for turning movement to combination changing position.

56. In a lock, a key operable member movable to operative and key changing positions, and means movable with said member and limited in movement to normally prevent said member being moved to key changing position, in combination with a combination changing key insertable in said member and cooperable with said means to disconnect said means from said member for the movement of said member to key changing position.

said member to diseonnee it om the cylinder to permit the Cylinder to be turned to key changing position.

In testimony whereof I hereunto affix my signet-ure.

TERRY BRYAN MOREHOUSE.

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