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Publication numberUS2023742 A
Publication typeGrant
Publication dateDec 10, 1935
Filing dateAug 15, 1931
Priority dateAug 15, 1931
Publication numberUS 2023742 A, US 2023742A, US-A-2023742, US2023742 A, US2023742A
InventorsEdwin W North
Original AssigneeNat Lock Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Combination locker lock
US 2023742 A
Images(3)
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Description  (OCR text may contain errors)

ec. U, E935. E' Wl NQRTH 2,023,742,

COMBINATION LOCKER LOCK Filed Aug, l5, 1931 3 Sheets-Sheet l I HIHIHIH Dec.. w, 935. E. w, NORTH COMBINATION LOCKER LOCK- Filed Aug. l5, 1931 5 Sheets-S1196?l 2 a@ Z y my. M my ec. 10, i935. E. w` NORTH COMBINATION LOCKER LOCK Filed Aug. vl5, 1951 3 Sheets-Sheet 3 Patented Dec. 10, 1935 UNITED STATES PATENT OFFICE COMBINATION LOCKER. LOCK Delaware Application August 15, 1931, Serial No. 557,299

8 Claims.

This invention relates to locks of a type controllable by both permutation means and by a master key.

In schools, institutions, or the like, it is usually desired that a single individual have access to only one locker but an authorized person have access to a series of lockers or all lockers. It is also desirable in locker installations to use a self locking lock and to provide for an automatic mechanism which will upset the combination when the locker or door is closed and yet to provide for means which will retain the combination and retain the lock in open position when the locker door is open and as long as ,the locker door is open.

Among other objects of this invention it is the purpose thereof to provide a compact, easily operable, self locking combination lock that may be master keyed and may be cheaply manufactured and is particularly suitable for use in conjunction with lockers in such a manner as to prevent unintentional upsetting of the combination.

In-the present invention, the foregoing desired features are accomplished by the provision of a novel self locking lock mechanism operable selectively by either permutation means or a key in combination With a door latch bar arranged to remain in unlatched position until tripped.

A better understanding of my invention will be obtained from the following description given in connection with the drawings which illustrate one mechanical embodiment of this invention and in which,

Fig. 1 is an end elevation of a combination lock embodying the features of this arrangement;

Fig. 2 is a front elevation of the lock shown in Fig. 1;

Fig. 3 is an interior view of the lock with the key post cylinder and permutation discs removed;

Fig. 4 is a transverse section taken on line 4-4 of Fig. 2;

Fig. 5 is a rear elevation with the rear plate and dial removed;

Fig. 6 is an enlarged E--B of Fig. 2;

Fig. '7 is a plan view of one end permutation disc; y

Fig. 8 is a plan View of an intermediate permutation disc;

Fig. 9 is a perspective of the front end permutation disc; y

Fig. 10 is an end elevation of an adjustable abutment washer used with each of the intermediate and inner end permutation discs;

Fig. ll is a perspective of the locking bolt;

Fig. l2 is a perspective of the index finger;

Fig. 13 is a perspective of the key slide plate;

Fig. 14 is a perspective of the supporting plate and attached key post cylinder;

Fig. l5 is a perspective of a key tumbler;

transverse section on line (Cl. 'Z0-53) Fig. 16 is an elevation of a key for actuating the lock;

Fig. 17 is a vertical section through a locker and door illustrating the installation of a lock and latch bar and showing the latch bar in locked 5 position; and

Fig. 18 is a similar section illustrating the latch bar in open position.

Referring more particularly to Figs. 1 to 15 which illustrate the combination lock per se, the 10 entire lock mechanism is housed within a casing Y or shell I having out-turned wings 2 by means of which the lock housing may be secured to a door or other supporting structure. Inthe illustrated embodiment, the casing I is formed with a recl5 tangular recess within which the entire lock mechanism may be housed and enclosed by a plate or cover 3. A rocking lock bolt 4 is pivoted upon a pin 6 secured to the rear wall of the housing preferably below the upper portion of the 20 bolt and projects through one side wall of the housing which is provided with a suitable aperture for that purpose. The bolt is urged into locked position by spring 1 (Figs. 3 and 6). An index nger 8 is pivoted by a pin 9 tothe upper 25 part of the lock bolt ata point removed from the bolt pivot. The index nger is provided with an upper lateral flanged projection I I constituting a cam surface, and a lower curved cam ledge I2 for purposes later to be described.

For key operation a floating bolt or a key slide plate I3 is disposed upon the inner surface of the rear wall of the shell for sliding movements thereon between the Wall and the bolt. The slide is formed with a lateral projecting flange I4 upon one end and a fence I6 projecting in the same direction from one surface thereof near the flange I4, and has a centrally disposed T shaped aperture I1. The end of flange I4 is provided with a cam ledge a track I3 arranged to engage the projecting cam surface II upon the index nger to cam the index finger downwardly when the slide is in one position and to be clear of the Vprojection II when the slide is in retracted position to the left as viewed in Figs. 3 45 and 5.

The slide I3 is arranged to be moved into its two positions by an arm I9 carried upon one end of a slotted key post 2I which is journalled at one end in the rear wall of the shell, and at its other end in a cylinder 22 carriedvby a supporting plate 23, secured to housing I in spaced relation to the rear wall thereof and overlying the bolt, the Vplate having inturned flanges Z to space the main portion thereof from the rear wall of the housing. The plate may be rigidly held in place by a. single screw 26 (Fig. 5). The supporting plate'is apertured as at 21 to receive and support the upper end of bolt pivot 6, and is also provided with .an inturned lug 28 (Figs. 6 60 and 14) positioned to engage the under cam sur-V Wall of the housing Aand the-supporting plate respectively, the tumblers being urged into locking position by the usual springs 32. The tumblers are arranged and slotted to'engage the fence I6 upon the otherslide in orderftoprevent or permit sliding movement of the key slideY and the integral cam track I8. ,-.Accordinglyupon y insertion of a proper key 33 (Fig. 16) and rotation thereof slide I3 will be moved to one or the otherof itsextreme positions, moving with it cam track I8, to permit'the bolt to be rotated independently of the permutation -means or restricted from rotation except as determined by the permutation discsV as will now be described. The end of the cylinder 22 is spun over to retain the key post in .position and ispreferably'V provided with only one entrance slo-t whereby the key may be withdrawn only when the bolt is lockedf.Y

In'orderthat the rocking of the lock bolt may be controlledbyv a combination mechanism, a series ofpermutation discs are mounted for rotation upon cylinder 22. In the present instance,

-three discs are employed;A an inner end disc 34,

an intermediate .disc 36,v and .anouter end disc 31. Each of Ythe discs 34.and. 36 are provided with a series of apertures. 38 and .39 respectively arranged in a concentric circle about the discs. All three discs are provided4 with radial slots 4l, 42, and 43 respectively whichextend inwardly a short distance fromthe `outer. edgeiof the discs. The slots,.when aligned by proper manipulation of the permutation discs, arearranged to receive the inwardlyturned end 44 of the flange il to permit pivotalY movement of bolt 4 as will hereinafter be more fully explained.

It will be understood that the permutation discs areadaptedto pick up one another when rotated in opposite directions, as required to set the combination for which the lock is adjusted to operate, that is, thediscs may be'adjusted .to a predetermined relationship whereby theirperipheral notches will be in registration and in position to receive index n'ger.

The outer disc 31 is provided with an integral sleeve 4.8 'of proper diameter toyrotate upon cylinder 22. The outer end of sleeve 46 is slotted at four diametrically opposite points as at 41.to adjustably receive the setting rdial andV knob 48, formed integrally in one piece and the. interior bore of which is of a proper diameterto t over sleeve,A 41 and Whichis provided with interior lugs 49 positioned to engage; inslots 41 whereby rotation of the knob will rotate sleeve-41 and disc the inturned end 44 of .the

31. Thev dial portionoi` the combineddial and knob terminates in a ilat annular rim 58V which seats under theescutcheon platefas will be later described. It will be' understood that the number of slots and lugs may be varied to permit `of a greater number of possible relative settings betweenA the knob and sleeve. y Y p The inner face of disc 31 is-provided vwith the' projection 5I (Figs.- 6 and 9) positioned, to engage an adjustable abutment tongue52 f orrned onan ,adjustablev ring 53. VThe abutment-52 projects laterally beyond one sideV surface of the ring and Acontinues in atongue 54 which prof jects laterally v.beyond the ormoslte face;r or" the ring and engages one of the apertures 39 in f disc 36. It Will be understood that ring 53 may be rotated relatively to thev disc 39 to bring tongue 54 into any selected aperture 39 to vary theY combination.

VThe abutment 56 terminates in a tongue 58 which engages a selected aperture 38 in disc 34. 10 The several permutation discs and their associated abutment rings are separated from each f other byA spacingywashers 59 which are keyed to cylinder 22 to prevent rotation thereof and to prevent one disc from rotating the adjacent disc except through engagement of the abutments.

' It will be apparent from the foregoing that upon rotation in one direction of knob 48, permutation disc 31 will be rotated and engage disc 36 which in'turn will engage disc 34 through 20 the associated adjustable abutment rings. Upon reverse rotation of knob 48, disc 34 will remain stationary and disc 31 will then rotate only disc 36. Upon another reverse rotation of knob 48,

discy 36 will remain stationary and disc 31 only 25- will be moved.v By rotating knob 48 the prescribed number of turns, stopping at the proper place at each turn, the permutation discs may be properly set so that slots 4|, 42, and 43 will be in alignment.

When the permutation discs are properly set to bring their respective peripheral slots in alignment at the proper positions bolt 4 may be swung in a clockwise direction about its pivot 6 as viewed inY Figs. 3 and 5. Rotation of bolt 4 35,

about itsV pivot will carry index nger 8 in a clockwise direction. If the peripheral slots have been aligned,'as was assumed, the projection Il and the inturned end 44 will be cammed downwardly'at the start by the cam track I8 and the inturned end 44 will enter the aligned slots 4l, 42, and 43.Y .Further pivotal movement of bolt 4 will merely carry index nger 8 in a further clockwise direction and rotate the three permutation discs about the cylinder and thereby pre- 45' vent anyone from observing the last number of the combination. If the peripheral slots of the permutation discs are not in alignment, the index Y fingerV cannot rotateabout its own pivot because projection H ofindex nger 8 will lock against 50i the downwardly curved cam track I8 and will accordingly prevent pivotal movement of bolt 4.k As previously stated, the bolt is Aalso adapted to be unlocked by a key. It will now be apparentthat when thekey post is turned through 5 5"4 the medium of a key and slide Vi3 moved to the right as viewed in Figs. 3 and 5, thus moving cam track I8 to the right, there will b'e'no camming of the index finger and no locking thereof, i. e. index finger 8 will merely slideabout theperipher-ies 60 of thezpermutation discs and accordingly bolt 4 may be swung about its pivot. In order to destroy the setting of the combination, means are provided for preventing the return of one or more discs upon return of the bolt. 65

In the illustrated form* of this invention the inner disc 34 only is provided with a'peripheral notch Y6l arranged Yto be engaged by a spring pressed pawl or detent 62 although it Will be apparent that any number of discs may be so provided.

The position of the notch 6| and of the pawl are so Varranged that YWhennotch 6l is engaged by pawl 62 disc 34 'is' so held that slot -4| is not engageable by the inturned end 44. Upon return movement o f bolt 4 acounter-clockwise direc- 75 Tongue 54 is of suicient 5 VVlength to project through disc 36 and engage and coact with an abutment 56 of a similar ad- .justable ring 51 overlying permutation disc' 34.

tion about its pivot, the inturned end 44 still being in engagement with the aligned slots will rotate the three discs backwardly in a counterclockwise direction, and pawl 52 will engage notch ii! and prevent disc 34 from returning to its full original position. Disc 3d will on the contrary be stopped just short of its original position in which its slot ril was aligned with the slots of the other discs. Simultaneously, at the end of the return stroke of bolt s, index finger 3 will engage lug 28 to cam the finger upwardly. This position in .which the index iinger is held in its upward position and in which permutation disc 35 is in upset position is clearly illustrated in Fig. 5.

The knob and dial may be conveniently locked in place by an escutoheon plate 63 which engages the annular rim and in which may be concealed and embedded the heads of screws 6d which serve to hold the escutcheon plate and the entire lock in position.

IThe lock just described is particularly adaptable for use in combination with a locker to securely lock the latch bolt of the locker because the combination is automatically upset upon movement of the lock bolt and yet may be held against upsetting. The lock bolt is also well suited to be actuated when released upon setting of the combination or actuation of the key by movement of the latch bar. In order that the combination may not be upset when the locker is open and before closing the same, it is desirable that means be provided which will retain the bar in raised or open position in order to prevent return movement of lock bolt i which would upset the combination.

With particular reference to Figs. 17 and 18, the combination lock previously described is shown as applied to a locker 66 (a portion only of which is shown) provided with a hinged door 6l. The locker is provided with three keepers 68 arranged to be engaged by a vertically sliding latch bar The latch bar is a channel shaped bar member slidable vertically within the marginal edge of the door and secured therein by any suitable means, not shown and is operable through the medium of a handle ll in the usual manner.

The bar and door are also pro-vided with aligned apertures 'I2 through which bolt 4 projects. The aperture 'l2 and the bolt 4 are so arranged that with the bolt i locked in its lowermost position it will retain or lock the latch bar in its lower position in which position it interlocks with keepers 68. On the other hand the bolt will be readily raised about its pivot upon raising of the locker latch bar when the bolt is unlocked due to the fact that the engaging portion of the bolt moves practically in a path parallel to the movement ofthe latch bar when the latter is moved to open position. To retain the latch bar in raised or open position, a spring 13 is provided and is secured at its upper end to the latch bar. The spring has its lower end 14 bent outwardly and of such length so as to project through the aperture formed in the bar and door to receive the keeper and to engage the lower edge of the aperture to retain the bolt in upper or raised position. The spring is also so shaped as to be engaged by the keeper when the door is closed to push the spring toward the door front to disengage the lower end from the door and permit the bar to slide downwardly. The bar is shown with the spring engaged to retain the bar in upper position in Fig. 18 and with the spring in retracted position in Fig. 17.

It is apparent from the foregoing description that the arrangement with a self locking lock constructed so as to destroy the set combination and with the locker latch bar arranged to retain the bar and lock in open position, is an ideal combination for locker use, and that the lock is not 5 only particularly suitable for locker use, being operable in the manner set forth and being operable by a master key, but is very simple and compact in construction, susceptible to many changes in combination and substantially free from all 10Y possible structural dimculties.

It is obvious that many changes may be made in the details of construction in the illustrated embodiment of this invention without departing from the spirit and scope of the invention disclosed thereby.

I claim:

1. A combination lock having combination mechanism including a plurality of permutation discs manipulatable .to a predetermined relationship, a bolt arranged to be secured in locked position and releasable therefrom when said relationship is established by said combination mechanism, means for rotating one of said discs upon movement of said bolt and means for engaging 25 said latter permutation disc upon movement of said bolt to prevent rotation of said disc to upset said combination mechanism after it has been set to open position.

2. A combination lock having combination 30 mechanism including a plurality of permutation discs manipulatable to a predetermined relationship, a bolt arranged to be secured in locked position and releasable therefrom when said relationship is established by said combination 35 mechanism, said discs being movable with said bolt, and means for engaging one of said permutation discs to prevent movement of said disc upon return movement of said bolt from unlocked to locked position to upset said combination mechanism after it has been set to open position.

3. A combination lock; having combintion mechanism including a plurality of permutation discs manipulatable to a predetermined relationship, a bolt having an index finger pivoted thereto 45 and arranged to lock said bolt against movement and release said bolt for movement when said relationship is established by said combination mechanism, rigid cam means for forcing said index finger into engagement with said permutation discs when said relationship is established and a second cam means for forcing said index finger out of engagement with said discs when said bolt is in locked position.

4. A combination lock having combination mechanism including a plurality of permutation discs manipulatable to a predetermined relationship, a bolt having an index finger pivoted thereto and arranged to look said bolt against movement and release said bolt for movement 60 when said relationship is established by said combination mechanism, rigid cam means for forcing said index finger into engagement with said permutation discs when said relationship is established and a second cam means for forcing said 65 index :linger out of engagement with said discs when said bolt is in locked position, and means for engaging one of said permutation discs upon movement of said bolt to upset said combination mechanism after it has been set to open position.

5. A combinationV lock having combination mechanism including a plurality of permutation discs manipulatable to a predetermined relationship, a bolt having an index finger pivoted thereto and arranged to lock said bolt againstmoveu mentV and release said bolt for movement when said relationship is established by said combination mechanism, rigid cam means for forcingA ment of said bolt and index nger, and a secondV cam meansvfor forcing said index nger out of engagement with said discs when said bolt is in locked position. Y i Y' 6. In combination, a locker having a door, a sliding latch bar for securing said door Vin closed position, a lock arranged to secure said Vlatchy bar in locked position, said lock including. a spring pressed rocking bolt in engagement with said bar andi selectively releasable by combination means and by key means and being further constructed and arranged to automatically upset the combination thereof upon return movement of the bolt from open to locked position and means for securing said latch bar and boltin unlocked position until said locker door is closed.

'7.V In a lock, a casing, locking mechanism within said casing and manipulatable to a predetermined relationship, a bolt arranged to be engaged by said locking mechanism to permit or restrict movement of said bolt, said casing terminating in a pair of laterally extending wings, an escutcheon plate having a pair of wings adapted to overlie the wings of said casing, and screws for securing said escutcheon plate to said casing, .the heads of said screws being embedded in one of said pair of wings,

8. In a lock, a casing, locking mechanism within Ysaid casing and manipulatable toa predetermined relationship, a bolt arranged to be engaged by said locking mechanism to permit or restrict movement of said bolt, said casing terminating in a pair of laterally extending wings, an escutoheon plate having a pair ofwings adapted to overlie the Wings of said casing, and screws for securing said escutcheon plate tosaid casing, the

escutcheon plate andthe Shanks thereof extending rearwardly through said casing. A

Y EDWIN W. NORTH.

- heads of said screws being embedded in said 20r

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3190089 *May 4, 1962Jun 22, 1965Master Lock CoKey-controlled, combination changing, permutation lock
US3447348 *Jul 26, 1967Jun 3, 1969Keystone Consolidated Ind IncCombination locker locks
US7963134Apr 23, 2007Jun 21, 2011Master Lock Company LlcDeadbolt lock
Classifications
U.S. Classification70/285, 70/DIG.710
International ClassificationE05B65/02
Cooperative ClassificationE05B65/025, Y10S70/71
European ClassificationE05B65/02L