US 3017761 A
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Description (OCR text may contain errors)
F. PLETERSKI Jan. 23, 1962 CODE LOCK 4 Sheets-Sheet 1 Filed April 50, 1957 AN QN F. PLETERSKI Jan. 23, 1962 CODE LOCK 4 Sheets-Sheet 2 Filed April so, 1957 F. PLETERSKI Jan. 23, 1962 CODE LOCK 4 Sheets-Sheet 5 Filed April 30, 1957 Jan. 2s, 1962 F. PLETERSK. 3,017,761
CODE LOCK Filed April 30, 1957 4 SheelZS-Sheei; 4
3,617,761 CODE LOCK y Friedrich Pleterslri, lt/luhlgasse` 9/ 12, ViennaIV, Austria Filed Apr. 30, 1957, Ser. No. 656,052 v Claims priority, application Austria May 15, 1956' 17 Claims. (Cl. 70-133)` This inventionrelatesto a code lock, which comprises a selector member, several adjustably arranged code discs forming a rigidiscanning'surface, and at least one shift-l able member, whichv can be advanced in steps in posi-r tions relative to the scanning surface which are determined by the selected code word. The invention is essentially characterized in that the selector member moves the shiftable member into a predetermined position relative to the scanning surface, which consists substantially of the peripheral surface of a solid of revolution, and by an actuating member which effects the stepwise advance and the return movement of the shifting member. The actuating member'is movable in all directions of movement of the selecto-r member and in addition thereto in a direction which is different from all directions of movement of theV selector member. Because the selector member moves the shiftable member to the position relative to the code discs which is determined by the code word whereas the advance of the shiftable member is then effected by another actuation as soon'as the relative position has been selected, the operation of the code. lock -is facilitated and the correct settingof the selector member isv neither tangible nor audible.
The previously known constructions of code locks have the disadvantage that some part performs a clicking movement in the correct position of the selector member. This is an important aid to an unauthorized opening of the code lock. For instance, code locks comprising code discs and a-shiftable member coacting therewith are known, in which the member for setting the code discs effects also the shifting movement of thefshiftable member. In such a case the selector member must be turned to the predetermined position and must then be reversely turned to actuate the shiftable'member. The actuation of these known devices is difficult because the selector member can be` turned only in one direction to the position which corresponds to the respective letter or digit of the code word or code number and an excessive turning of the selector member can no longer be corrected by a reverse turning because a Vreverse turning of the selector member will immediately cause an actuation of the shiftable member. This enables also the detection of the clicking of the selector member in the correct position, possibly with the aid of sensitive instruments.
As contrasted therewith the construction according to the present invention has the advantage that the selector member can be freely turned in either direction'to select the position of the shiftable member relative to the code discs and that no part clicks in the correctly selected position to facilitate the detection of that correct position. After the correct letter or correct number of the respective code word or code number has been freely preselected, the shiftable member may be shifted-by the actuation of a separate actuating member. The selector member is suitably operable with the aid of a rotary knob and the actuating member is movable in the direction of the axis of the rotary movement of the rotary knob. The shifting operation will be performed onlyV when the selector member is in its correct position. When the selector member is in a'wrong position the axial movement remains ineffective or the previously achieved correct setting is entirely erased.
In a preferred embodiment of 'the invention the code discs which form the scanning surface consist of axially aligned setting rings, which'are formed on one of their 2 peripheral surfaces with recesses which coactwiththef shiftable member. This affords the advantage that the' di-rectionof movement ofthe shiftable member agreeswith-the3directionfofmovement of the actuating. mem-' ber, whichinvol-ves a simpler constructionand-Linereasesf' the reliability inoperation. TheV lnumber of code discsy and the length of the-code4 word or code number may? be selected as desired withoutl complicatingv theconi struction;V These advantagesA areY not achieved in the known priorart, in whichthe scanning surfaceis-formedl by the end faces offseveral concentrically arranged rings.
Special advantages will be obtained if the recesses are arranged accordingto thel invention on the inner. peripheral surfaces of ther setting rings and consist of shallow depressions. Then the entire mechanism for feeding the shiftable member may be arranged Vwithin the setting rings,` permittingV a particularly.space-saving construction.
AccordingY to the invention the selector member may be combined with the actuating-member in a simple manner to form asinglecontrol member, which is rotatable and axially slidable like a push knob. This affords the ad-4 vantage that only a single part needs to be passed through the door to be locked, whereby obstacles to unauthorized opening are increased. In addition, this arrangement simplifies the operation, to turning av pushknob and pressing the same.
Because the setting rings forming Ithe code discs are adjustable tostationary positions in the construction whereas the selector member is rotatably and axially slidably arranged, the setting rings may easily be inserted according to the selected code word when the lock casing has been opened and the code word may be altered without diculty.
An illustrativeembodiment of the code lockl according to the invention is diagrammatically shown in the accompanying drawings.
FIG. l is a sectional view taken on line I-I of FIG. 2, the shiftable member 28 being'turned` into the plane of section for greater clarity.
FIG. 2 is an elevation showing the lock as viewed from the inside, with the casing cover removed.
FIG. 3 is an elevation `in the direction of the arrow III of FIG. 2 with the shiftable member shown in section.
FIG. 4 is an elevation showing the casing cover as viewed from the inside, with inserted setting rings.
FIG. 5 is a sectional view taken on line V-V of FIG. 2.
FIG. 6 is an elevation showing a detail viewed in the direction of the arrow VI of FIG. 5.
FIG. 7 is an elevation showing the selector handle as viewed from the outside.
Like numerals refer to like parts throughout the specification and the several views of the drawings.
The code lock proper is mounted on the door leaf 1 to be locked whereas the locking claws 3 which cooperate with the lockingmeans of the lock are atlixed to the door frame member 2 cooperating with the door leaf 1 to be locked. A selector handle`4, which consists preferably of transparent plastics, is disposed on the outside of the door leaf. The selector handle 4 comprises a flange 5, which is provided on its underside with `letters or numerals in luminous paint. Thereby it is avoided that the letters are worn off or become illegible by the manual actuation as they might be if provided on the upper side; A fixed marker 6 is provided for alignment with the letters during operation.
The selector handle 4 is slidingly tted a square shaft 7 and is urged by a conical spiral spring 8v against the surface of the door. The conical spiral spring S bears on a disc 10, which is held by means of a headed pin 9 on the square shaft 7. Pressure is exerted on the disc 10 during the actuation of the lock.
The square shaft 7 extends through a bore 11 of the door leaf 1 to be locked and during assembly is cut to the length which corresponds to the thickness of door leaf 1. The shaft 7 represents the control member, in which the selector member and the actuating member are combined in a simple and suitable manner.
The casing 12 of the code lock is screwed by means of fixing screws 13 to the inside of the door leaf. The casing 12 is closed by a cover 14 mounted with a bayonet joint. The cover 14 is formed on its inside with a cylindrical counterbore 15, in which the setting rings 16 are inserted. The alphabet or any desired number of numerals are impressed upon the end face of each setting ring 16 (FIG. 4). The outer peripheral surface of each setting ring 16 is formed with notches 17, each of which corresponds to one letter of the alphabet. The cover l14 has a web 18, which engages one of the notches 17, depending on the rotational position of the Setting ring, and prevents a rotation of the inserted setting ring 16. When it is desired to set any desired word it is suicient to insert the setting rings in the cover in the reading sequence of the letters of the code word or of the numerals of the code number, the web 18 engaging only the notch 17 which corresponds to the respective letter of the code word (FIG. 4).
The square shaft 7 is formed at its end with an enlarged cylindrical portion 19, which is slidably guided in a bore 20 of a sleeve 21. The sleeve 21 is axially non-displaceably but rotatably carried in the cover 14 and is connected for rotation with the square shaft 7 by a flange 86, within which shaft 7 slides. The enlarged end 19 of the square shaft 7 is formed with a bore 22, which contains a compression spring 23, which bears on the inside of the cover 14. Pressure on the disc 10 will thus cause the enlarged cylindrical portion 19 of the square shaft 7 to be reciprocated in the bore 20 of the sleeve 21. This axial movement is reversible only at its end points. To this end a split locking ring 26 of spring steel wire cooperates with a double cone 24 of the enlarged cylindrical portion 19 of the shaft 7 and with a pair of spaced transverse grooves 25 of the bore 20. The depth of the grooves 25 is such that the double cone 24 can pass on the inside through the 4locking ring 26 when the latter yields into one of the grooves 25. Because the grooves are arranged near the end positions of the axial movement of the locking ring 26 and the angle of the double cone is less than the angle of friction of steel in contact with steel (preferably degrees each) the axial movement of the shaft 7 can be reversed only in the two end positions because otherwise the locking ring is forced by the cone against the wall of the bore 20 to lock the longitudinal movement. Thus, an incomplete pressing of the actuating member Iand a resulting functional dsturbance of the code lock is safely avoided. To prevent the operator from depressing shafts 7 and 19 until ring 26 would come below the groove 25 remote from knob 4, this groove is spaced from the bottom of the counterbore 15 a distance combining the width of the spring, when under compression and the width between the bottom portion of shaft 19 above and the bottom of cone 24.
The sleeve 21 comprises a longitudinal slot 27 (FIGS. 2 and 3), in which a shiftable member Consisting of a shiftable plate 28 is slidingly guided in a close fit. To this end the sleeve 21 is formed with a bore 29, which extends in the axial direction of the sleeve and in which a ball 30 carried in an orice of the shiftable plate 28 is slidably arranged (FIGS. 1 and 3). A window 31 of the shiftable plate 28 contains a spring 32, which bears at one end on the wall of the window 31 of the shiftable plate 28 and with the other end on the wall of the bore 29 of the sleeve 21. The window 31 is slightly eccentric relative to the yaxis of the bore 29 (see FIG. 1).
The shiftable plate 28 has a nose or abutment 33, which is urged by the spring 32 into a position in which it extends radically outwardly into engagement with the inside cylindrical surfaces of the setting rings 16. Each setting ring 16 has in its inner periphery a shallow depression or notch 34 (FIG. 4), in which the nose 33 of the shiftable plate 28 is slidably received when the shiftable plate 28 has been turned to the correct letter. Thus a rigid scanning surface is formed by the several surfaces of the setting rings superimposed as shown in the present illustrative embodiment to form the surfaces of a hollow circular cylinder with depressions spaced therein at predetermined points.
A retracting pin 35 is pressed into shaft 7. As will be described more fully hereinafter, retracting pin engages a tooth 36 of the shiftable plate 28 and retracts the latter to its initial position when the control member is pressed following a selection of a wrong letter.
In order to enable the shiftable plate 28 to be advanced, a pawl 37 (FIG. 3) is provided, which is longitudinally slidably and pivotally carried on a milled-0E portion 38 (see FIG. 2) of the sleeve 21. The pawl is mounted with an interposed spring disc 39 on a pin 40, which is pressed into the sleeve 21, which passes through a slot 41 in pawl 37. The pawl is thereby mounted for limited sliding movement in a direction generally parallel with the axis of shaft 7. See FIGURE 3. Also pawl 37 has a cam slot `42, which consists of two portions 42 and 42" forming together a wide angle. The slot 42 receives a pin 43 affixed to the shaft 7. The pawl 37 comprises also a tooth 44, which coacts with recesses 45 in the shiftable plate 28. The distance between two recesses 45 is suitably equal to the axial thickness or dimension of each of the setting rings and the number of recesses corresponds to the number of setting rings. As is apparent from FIG. 3 the recesses 45 have a sawtooth-like profile. As will be described more fully hereinafter this construction ensures a stepwise advance of the shiftable plate 28 responsive to each correct selection and pressing of the control member.
`In order to prevent a selection of an intermediate position between two code letters, there is provided a detent pin 46, FIGURE l. This pin is guided in a bore 47 of the sleeve 21 and coacts at one end with a recess 48 of the shaft 7 and at its reduced other end through the intermediary of a spring 49 and ball 50 with notches 5l of the casing 12, see FIGURE 2. These notches 51 correspond to the notches 17 of the setting rings. If a precise setting is made to a letter the ball 50 will slide into the respective notch 51 and under the influence of the inclination of the recess 48 the pin 46 can yield outwardly against the action of the spring 49 during the subsequent axial movement of the shaft 7. In the case of an inaccurate setting the ball 50 will prevent the pin 46 from giving way because in that case the ball 50 does not lie in the notch 51 but on the land between two notches, closer to the shaft 7. This device will also prevent a rotation of the shaft 7 when the axial movement of the shaft 7 has not been completed because in that case the shaft 7 engages the pin to displace the latter more to the right whereby the ball 50 is prevented from yielding out of the respective notch 51.
When the correct selection and the advancing movement of the shiftable plate 28 have been completed a stop 52 provided on the shiftable plate 28 will lie in the plane of the latch or locking bolt 53 as shown upon FIG. 1. The locking bolt 53 has an arm formed with a tooth 54 (FIG. 2) so that a rotation of the selector handle in the sense of arrow a of FIG. 2 will cause the stop S2 of the shiftable plate 28 to engage the tooth 54 of the bolt 53 and move it to the left to its non-locking position. The bolt 53 has also a stop 55, which extends slightly out of the plane of the bolt and is suitably welded thereto, and which cooperates with a counterstop 56 provided on the sleeve 21 (FIG. l) so that a rotation of the selector handle in the sense of arrow b of FIG. 2 will enable the bolt 53 to be moved to the right to its locking position, in which its right-hand end is disposed between two locking balls 57, which seat in recesses in i will be explained hereinafter.
the locking claws" 3 (FIG.'2), the righthandedof the locking bolt preventing the locking balls 57 from yielding inwardly.` l
A plate 59 pivoted on a shaft 58`in'l the casing` 12y comprises a pin fwhiehis held by a spring 61 gripped in the casing 12.`= The plate 59`has` vastop-62., which lies normally in a narrowy slot 63 (FIG. 4) of the' cover 14 to prevent rotationofthe cover 14 and ari'opening' of the bayonet joint between the`cver"14andlthe casing 12. The plate 59 has alsotwo stops 64 and 64",` by means of which the plate59 can be"pivotally'moved on the shaft 58 to move the stop 62 to a positioninw'liich it can slide into a guide I65?(FIGL4) formedfintheco'ver 14 tolenable theremoval of--the latter'. This? movement" of the plate' 59 will be described more fully`her'ei'naffte'rlI The cover 14 maybe affixed' tothe casing lzfandthe door leaf 1 by a screw' 66, which is`- sitablypreverited from `being knocked out by a'transvers'eblt 67l arranged inthe door leaf`1.
The fbolt 53 has'anfapertureifsf-which comprises a part y68 shaped-according"tvanarc'fofia circle an'dcon-y tinued by an' elongated part 68"' (FIGf' 2). Thefca'sing hasalso an a'pertiir`e69',` whichfcon'sis'ts-alsoof apart 69 shaped a'ccor'dingto anfarcofi'a cirelel'and continued by an elongated party 69". A pin`-70=`xedlwitli a slide' 71 arranged on the outside of the easing cooperates with said apertures 68,769.` The slide 71 i's1f*prevented from' being removed by"a"clip"72` engaging a reduced 'portiori'ofk the pin 70 (FIG.y 5),-and'has' a window 73, 'i'n'l which marks 74',- 74", 74' arrangedfinf'xed position on the casing and having preferably different colorsvarevisible depend'- ing on theposition ofthe slide:- ,For instance; the mark 74' may be green, the mark 74" maybe red and the mark 74" may be white'.
The'pin 70 of the 'slide' 71 consistssubstant'ially of two parts 75 and 76. As is apparentl from FIG. 6 the pin portion 75`is Vcylindricaland has only a milledlof portionr77 on its sidel facing the window 73. On the other hand, as is apparent from FGQZ, the pin portion 76 is of semi-circular shape aridihas:amilled-oifportion 78.
The casing 12"is` c o'vered adjacent to the slide by 'a hardened 'steel plate 79 (FIG. l).
i The locking balls 57` are urgedotwardly/ by a spring 80 and are suitably arranged so that the distance vc (FIG. between the ball centers andthe base surface of the locking claws 3 correspondsatleast substantially to the distance d (FIG. 2) between the ball centers and the outside surface of the casing 12.
The 'ange 5 ofthe'selector handle 4 is provided'with a locking mark 81 (FIGS. 1 and 7), the purpose of which l To enable an actuation also by blind persons the locking vmark 81 isl embossed (FIG. l). This tangible starting point for each selectionren'ables the selection of each set code word -to be made without seeing the `letters because the severalv letters will be exactly indicated'by -a click (ball ,50 and notches 51); the actuating member is pressed after each selection of a letter. The" window 73 of the slide 71 enables the operation to be feltby blind lpersons also on the inside ofthe door. Even the vsetting of a new code word may be eiected by a blind person because the setting rings have no notchu17 between the letters Z and A, as is apparent frornFIG. 4, and the letters are suitably impressed on the end face of the rings so that a blind person can find out and set the desired let-ter of the code word by touch. I l
The'locking claws 3 are affixed to the door frame 2 by screws 82, whichY are suitably prevented vfrom being knocked out by at least one transverse pin 83.
The locking bolt 53 maybe secured in its various functional positions by a detent ball 85 received in grooves 84.
Hereinafter the various functionsY of the code lock according'to theinvention'will be described more fully.
Theselectorhan'dlel is turned either clockwise or counter-clockwi'seuhtil the selected letter of the code wor'dis in'registerwitli the Vmark' 6. The shiftable plate 28 is in its initial position',v in which iti is entirely in the cover 14'. The rotation of thesele'ctor handle'4 causes the sleeve 21 and the shiftable plate 28 carried thereby to'rota'te'until the nose 3,3 ofthe 'shiftable'plateZS e111 ter's the depression 34 of tlie iirst setting ring. Then the spring 32 swingsftlie shiftableplate 28' radially outwardly about the" ball`30. Thegcontrol member is then depressed, manually, and the 'shaftx 7` andthe retracting pin 35 pressed in the same are axially moved, with the retracting pin 35 sliding below the outwardly swung shiftable plate 28, which thereby is not retracted (FIG. 1). During the axial movement of the shaft 7 against spring 23 the pin 43 inserted in the shaft slides in ythe cam vslot k42 of the pawl 37 (FIG. 3). As long as the pin 43 slides in the part 42 of the cam slot the pawl 37 is swung to the'left, as seen in FIG. 3, whereby its tooth 44 is disengaged fromthe recesses 45 in the shiftable plate 28. Then the pin 43 slides in the slot part 42" and the pawl 37 remains unmoved since slot rpart .42" extends radially of pivot pin 40. When the pin 43l has reached the end of the slot part 42" the pawl 37 will be moved along, the pin 40 slidingvin the guide slot 41 of the pawl- 37. When the shaft 7 isthen returned under the action of the spring 23 the pin 43 will slide rst in the slot part 42, the pawl remaining unmoved. When the pin 43 slides then in the slot part 42 the pawl`37 willbe swung about the axis of the Vboltl 40 to cause the tooth 44 to engage the next following recess 45 of the shiftable plate 28.` When the pin 43 hast reached the end'of the slot part 42' the pawl 37 and with it the shiftabler plate 28 will be carried along to advance the shift'able plate'28 tothe next following setting ring. Then the next' following letter of the code word must be selected, whereafter the control member is again depressed, etc. and the operation repeated. After the last letter of the code word has been selected and the control member has then-been depressed the shiftable plate reaches the position'shown in FIG. 1, in which the stop 52 of the shiftable plate 28 is in the same plane as the locking bolt 53 so that a counter-'clockwise rotation of the selector handle in the sense of the arrow a (FIG. 2) will cause the stop 52 to engage the tooth 54 of the bolt, whereby the bolt 53 is pulled to the left to its nonl-ocking position. Now the balls 57 can yield inwardly against the action of the spring and the door can be opened.
After' a wrong selection the nose 33 of the shiftable plate 28 does not lie in a depression 34 of the setting ring so that the shiftable plate 28 is forced inwardly. The pressing of the control member will then cause the retracting pin 35, which engages the tooth 36 of the shiftable plate 28, to move the latter back to its initial position. The code word must now be selected again, each selection of a letter being followed by a pressing of the control member.
Opening the lock from the inside The lock may be opened from the inside in a simple manner by pushing the slide 71 to the right until the green mark 74 provided on the casing appears in the window 73. The bolt 53 is carried along to the left by 'the pin portion 76 disposed in the lower part of the arcuate section 68' of the aperture 68. Then the lock is open.
`Closing the lock from the outside To this end the selector handle 4 is first turned in the sense of the arrow b of FIG. 2 until the locking mark 81 is in register with the mark 6. By this operation the shiftable plate 28 is turned so that its stop 52 is disposed below the tooth 54 of the bolt, whereby the shiftable plate 28 is urged inwardly and will be pushed back to its initial position by the retracting pin 35 following the subsequent axial movement of the square shaft 7 under the finger pressure exerted on the disc 10. To open the lock from the outside it is then necessary to make a correct selection of the code word and to press the control member completely after each letter.
Closing the lock form the inside After the door has been closed the slide 71 is pushed to the right until one half of each of the green and red marks 74 and 74 appear in its window 73. During that movement of the slide the bolt 53 is carried along by the pin portion 76 of the slide 71 lying in the lower part of the arcuate aperture 68' of the bolt (FIG. 2) to a position in which its right-hand end is disposed between the locking balls 57 so that the latter cannot yield towards each other and the door cannot be opened. To open the door from the outside it would now be necessary to select the several letters of the code word and press the control member, whereafter the bolt 53 can be pulled to the left to its open position by turning the selector handle 4 counter-clockwise in the sense of the arrow a of FIG. 2.
Locking up from the inside When it is desired to lock up the door from the inside in such a manner that it cannot be opened from the outside even if the code word is properly operated the slide 71 and with it the bolt 53 is pushed to the right until only the red mark 74" provided on the casing appears in the window 73 of the slide 71. In that position the bolt 53 locks the balls 57 and is pushed to such an extent to the right that its tooth 54 is outside the path of the stop 52 of the shiftable plate 2.8` and is no longer engaged by the stop 52 when the selector handle 4 is turned in the sense of the arrow a of FIG. 2.
Locking up from the outside When it is `desired to lock up the lock in such a manner that it cannot be opened from the inside, the slide 71 is moved to the left until the green mark 74 appears in its window 73. When the door is open and the slide 71 is in that position the slide can be turned through 180 so that the white mark 74 appears in the window 73 of the slide 71. That rotation is possible because in this position of the slide the arcuate pin portion 75 can slide in the arcuate part 69 of the aperture 69` in the casing 12.. At the same time the pin portion 76 of the slide 71 is turned out of the arcuate part 68 of the aperture 68 in the bolt 53. The slide 71 cannot be turned when the `door is closed because the locking claws 3 prevent a rotation of the slide when the door is closed.
When the slide is in position white and the door is closed, followed by turning the selector handle 4 in the sense of arrow b of FIG. 2 to push the bolt 53 to the right to its locking position, the pin portion 76 sliding in the elongated part 68" of the aperture 68 of the bolt, the lock cannot be opened from the inside because the slide 71 being guided between the locking claws 3 cannot be turned and cannot be displaced either because the pin portion 75 lies in the arcuate part 69' of the casing aperture 69.
Because of this operating the lock can be initiated only when the door is open, and a misuse by persons on the outside of the door is precluded.
Change of the code word r code number For this purpose the screw 66 is loosened first. While the door is opened the first four letters of the code word are then selected in succession and the control member is depressed after each selection. Thereafter the stop 52 of the shiftable plate 2S lies in the same plane as thc plate 59 which carries the stop 62 preventing a rotation of the casing cover 14. Now the selector handle 4 is set to the letter G but without subsequent pressing. Depending on the direction in which this rotation of the selector handle has been performed the stop 52 will engage one of the stops 64 and 64 of the plate 59, whereby the plate 59 is turned on its shaft 58 against the action of the spring 61, which holds it in its position of rest. During that rotation the stop 62 is swung either to or from the square shaft 7; in the latter case the stop 62 is guided into the guide 65 of the casing cover 14 (FIG. 4). Thereupon the casing cover 14 can be turned to open the bayonet joint between the casing cover 14 and the casing 12. Then the cover 14 can be removed, the setting rings 16 can be taken out of the cover and reinserted into any desired position, in which they are by the web 18 of the cover 14 engaging one of the notches 17. As the cover 14 is mounted back on, the selector handle is again turned to the letter G because the stop 62 which prevents a rotation of the cover 14 is then swung out. Then the screw 66 is screwed in and after the closing mark has been selected the control member is pressed to erase ythe correct selection of the first four letters of the code word.
'Ihe fixing screws 13 of the casing being arranged inside the casing or casing cover they can be loosened only when the cover has been removed. A removal of the cover is possible only when at least part of the code word has been correctly selected, followed by pressing after each selection. Thus, a discovery of the set code word and a removal of the entire lock by unauthorized persons is prevented whether the door is closed or open and the present invention provides a door lock which cannot be removed by unauthorized persons even when the door is open. In order to prevent the screws from being knocked out they may be secured by transverse pins just as the cover fixing screw 66 and the screws 82 for fixing the locking claws.
The use of a square shaft as a part of the control member has the advantage that it enables the lock to be mounted in four positions for right-hand and left-hand doors and on the upper or lower side of drawers. To this end it is sutcient to push the selector handle 4 in the desired position on the square shaft 4 and to drive in the mark 6 in the corresponding position.
1. In a combination lock, a casing, a plurality of discrete rings `stacked in said casing in end-to-end relation coaxial of a common axis, each said ring having a notch in its inner periphery yand being independently adjustable about said axis, means fixing each said ring relatively to said casing, in a selected one of a plurality of positions of rotational adjustment about said axis a plate shiftable axially along and within said rings, said plate having an abutment and a sequence of recesses extending parallel with the axis of said rings, first means carried by said cas- `ing and manually operable to rotate said plate to align said yabutment with the notch in each said ring in succession, and pawl means manually operable to engage each said recess in sequence, to -advance said plate through said rings, step by step, when said abutment is' correctly aligned with the notch in each respective ring.
2. In a combination lock, a casing having a cylindrical recess having an axis of symmetry and a web fixed with the surface of said recess parallel with said axis, a plurality of discrete rings fitting said recess in stacked, end-toend relation coaxial of said axis, there being a plurality of angularly-spaced notches in the outer periphery of each said ring, each notch being adapted to t over about said web whereby to individually fix each said ring relatively to said casing, in a selected position of rotational adjustment about said axis there being a notch in the inner periphery of each said ring a bolt carried by said casing for movemen-t between locking and unlocking positions, a plate -shiftable axially in and along said rings and having an integral abutment, a stop, and a series of recesses spaced along said axis, means mounting said plate within said rings for rotation about and translation along said axis, first means manually operable to rotate said plate to align said abutment with the notch in each said ring in succession, pawl means operable to engage each said recess in sequence, to translate said plate step by step through each ring when said abutment is aligned with the notch thereof, and means for manually operating said pawl means, said last-named means returnin-g said plate to initial position if said plate has not been rotated into alignment, as aforesaid, said stop beingengageable with said bolt to move the same lto unlocking position, only when said plate has traversed the `final one of sai-d plurality of rings.
3. A combination lock, comprising, a casing having a recess symmetrical about an axis, a plurality of rings in said recess, in end-to-end relation- Icoaxial of said axis', each said ring having a notch in its inner periphery, means releasably xing each said ring in a selected position of rotational adjustment about said axis, a sleeve fitting within said rings for rotation only about said axis, a shaft rotatably mounted in said casing coaxial of said axis and having an axially slidable non-rotatable connection with said sleeve, plate means, means mounting said plate to said sleeve for rotation as a unit therewith and for radial movement in a plane through said axis, an abutment fixed with said plate means and translatable through each said ring only when rotationally laligned with the notch therein, means responsive to axial translation of said shaft to effect corresponding step-by-step translation of said plate means through each ring in succession, when said abutment is aligned as aforesaid, a lock bolt movable in said casing between locking and unlocking positions, and sto-p means fixed with said plate means and engageable with said bolt to move the same to unlocking position in response to rotation of said shaft, only when said abutment has traversed the final one of said rings.
4. A combination lock as in claim 2, said casing including a body and a cover sep-arable therefrom, a bayonet joint connection between said body and cover and cover and releasable in response to rotation of said cover about said axis, latch means fixing said cover in position against rotation about said axis, said stop means being axially positioned to engage and release said latch means, only when said abutment has traversed the penultimate one of said rings.
5. In an assembly `for a combination lock, a sleeve having a first axis of symmetry and an outwardly-opening slot in a plane through said `first axis, a plate fitting said slot for movement in said plane and translation along said axis, means pivoting one end of said plate on a second axis offset from said first -axis and normal to said plane, a plurality of discrete recesses in said plate and extending in equally-spaced relation parallel with said axis, and ratchet means pivotally mounted to said sleeve and having a nose engageable with said recesses', in sequence.
6. In an assembly for a combination lock, a sleeve having a first axis of symmetry and an outwardly-opening slot in a plane through said first axis, a plurality of rings fitting about said sleeve and slot, in end-to-end relation, each said ring having -a notch in its inner periphery, eans fixing said rings in predetermined rotational position about said axis, a plate fitting said slot for movement in the plane thereof and for pivotal movement about a second axis normal to said plane, lan abutment fixed Iwith said plate 'and traversable through each said ring, in succession, only when rotationally aligned with the notch-therein, spring means urging said plate outwardly iabout said second axis, said plate having a series of recesses equally spaced in a -direction parallel with said first axis and corresponding in number to .the number of said rings, a shaft coaxial of said axis and having a splined connection with said sleeve to manually rotate thesame,a pawl mounted to said sleeve for sliding pivotal movement Vrelatively thereto, and having a nose adapted to engage in each said recess in succession, land `a pin-and-slot connection be# tween -said shaft and said pawl and operable in response to axial translation of said shaft, first to retract said pawl to free the same from said plate and then tomovesaid pawl along said axis by a distance equal to the spacing between contiguous ones of said recesses.
7. In a lock, a casing, a shaft journaled in said casing for manual rotation about an axis and for translation along said axis, a sleeve rotatable in said casing on said laxis in response to rotation of said shaft, ring means fixed in -said casing about said sleeve coaxially of said axis and having a plurality of angularly-related notches in its inner periphery in respective'sequentially-disposed planesnormal to said axis', plate means rotatable `with said sleeve about said axis and* including 4an yabutment traversable through said ringmeansA only when sequentially rotationally aligned with each succeeding vnotch therein, means interacting between said sleeve and shaft requiring a full axial translation of said shaft between first and second limiting positions', means actuated by laxial translation iAof said shaft to second position moving-said plate vthrough each notch in succession when its abutmentis rotationally aligned therewith, `and means actuated by`tra`nsl'ation of said shaft restoring'said plateto first pos'itionalong said axis unless its abutment isv rotational-ly aligned with the nextk succeeding notch in said ring means. f
8l In a lock, a casing, a shaft journaled infsaid casing `for manu-al rotation about an *axis andfor translation along said axis between -a first and a second limiting position,a bolt translatable in said casing toward and from said axis and including a hooked end adjacent and offset from said shaft, a sleeve rotatable in said casing on said axis, ring means fixed in said casing about said sleeve coaxi'ally of said axis and having Ia'plurality ofangularly relatedV notches in its Yinner periphery in respective sequentially disposed planes normal to said axis, plate means rotatable with said sleeve about said axis including an'abutment traversable through said ring means only when sequentially rotationally aligned with each succeeding notch therein, means interposed between said sleeve and shaft requiring a full axial translation of said shaft between said positions, `means actuated by said shaft restoring said plate to first position along said yaxis unless its abutment is rotationally aligned with the next succeeding notch in said ring means, and means fixed with said plate means and engage-able with the hooked end of said bolt to translate said bolt in response to rotationof said shaft, only after traversing the final one of said plurality of notches and movement of said plate to second position along said axis.
9. In a combination lock, a casing, a bolt movable vin said casing between first and second positions, a sleeve mounted in said casing for rotation `about its longitudinal axis, a shaft mounted in said casing for rotation on said `axis and for translation therealong, means connecting said shaft `and sleeve for rotation as a unit about said axis, a plurality of discrete setting rings in said casing in stacked relation and individually adjustably fixed coaxial of said axis, each said ring having ya depression in its inner periphery, a bolt-operating plate mounted in said sleeve `for rotation therewith land for sliding pivotal movement with respect thereo, abutment means fixed with said plate and constructed and arranged to pass a contiguous ring only when rotationally aligned with the depression therein, ratchet means carried by said sleeve and engaging said plate to move the same through each said depression in sequence, .an operating connection between said shaft and ratchet means, and means fixed with said plate and movable therewith into position for operating said bolt from first to `second position, only when said plate has moved along said axis to pass its vabutment means through the final one of said rings.
10. In a combination lock, a casing, a plurality of rings adjustably fixed in said casing in superposed stacked relation about a common axis, each said ring having a notch in its inner periphery, a sleeve fitting w-ithin said rings for rotation about said axis, a bolt-operating plate mounted with said sleeve for rotation as a unit therewith and for pivotal sliding movement in a plane through said axis, said plate having an abutment movable through each said ring, in succession, only when rotationally aligned with the notch therein, a shaft having one end journaled within said sleeve for rotation about said axis, a spline connection between said shaft and said sleeve, whereby said shaft is axially slidable in and relatively to said sleeve between first and second limiting positions but constrained to rotate as a unit therewith, interengaging ratchet means between said sleeve and plate, means operated by and in response to axial translation of said shaft between said positions to actuate said ratchet means to move said plate, step-by-step to position advanced through each said ring, in succession, a bolt, and means fixed with said plate engageable with said bolt to retract the same, only when said plate has traversed all said rings.
11. A lock as in claim 10, and means connected with said shaft and engaging said plate to return the same tov first position only when the abutment thereof is not rotationally aligned with the next succeeding notch.
12. In a lock, a casing, a plurality of discrete stacked rings rotationally radjustably fixed in said casing about a common axis, each said ring having a notch in its inner periphery, a sleeve fitting within said rings and rotatable about said axis, a ybolt-operating member mounted to said sleeve for rotation as a unit therewith and for pivotal sliding movement relatively to said sleeve in a plane through said axis, said member having an integral abutment movable through each said ring, in succession, only when rotationally aligned with the notch therein, whereby said abutment may be -advanced in translation along said axis and through said rings, from an initial position on the remote side of an end one of said rings, to a final position on the remote side of the other end ring of said plurality of rings, a shaft rotatably mounted in said casing for manual translation in and along said axis between first and second limiting positions separated by a distance greater than the combined axial dimension of said rings, interengaging means between said sleeve and shaft constraining the latter to a full stroke between said limiting positions, ratchet means carried by said sleeve and engaging said member to hold the same in position advanced through each said ring in succession, a bolt movable in said casing and including means engageable by said member in response to rotation of said shaft and sleeve only when said member has advanced to carry its abutment to final position, and interengaging means between said shaft and member returning said member to initial position in response to a stroke of said shaft, unless said abutment lies within one of said notches.
13. In a combination lock, a casing, a plurality of superposed stacked discrete rings each adjustably fixed in said casing in a predetermined position rotationally about a common axis, each said ring having a notch in its inner periphery, a sleeve fitting said rings for rotation about said axis, there being a slot in said sleeve in a plane through said axis, a bolt-operating plate having a radially outward abutment and mounted in said slot, means mounting one end of said plate for pivotal sliding motion in and along said slot, means urging the other end of said plate radially outwardly about the pivot thereof, said plate being movable along said axis through each said ring, in succession, only when said abutment is rotationally aligned with the notch therein, a shaft slidably fitting said sleeve and connected for rotation as a unit therewith, ratchet and pawl means operated by axial sliding `of said shaft to advance said plate step-by-step through ,said rings to an unlocking position, and means carried by said plate and engageable with said bolt to shift the :same to unlocking position only when said plate is in :said unlocking position.
14. In an assembly for a combination lock, a plurality `of stacked rings fixed coaxially of a common axis, each said ring having a notch in its periphery, a shaft mounted ifor rotation on said axis and for translation therealong, :abutment means, means mounting said abutment means for rotation with said shaft and for independent rotation in a plane through said axis and for translation along said axis, means constraining said shaft to a full stroke in :translation between first and second limiting positions, -ratchet means operated by translation of said shaft and moving said abutment means step-by-step through each succeeding ring when rotationally aligned with the notch therein, to advance said abutment means from a first to a second limiting position through all said rings in succession, and means fixed with said shaft and engaging said abutment means to return the same to first position when not rotationally aligned with the notch in the next succeeding ring.
15. In an assembly for a combination lock, a sleeve having a first axis of symmetry and an outwardly-opening slot in a plane through said first axis, a plate fitting said slot for movement in said plane and translation along :said axis, means pivoting one end of said plate on a sec- Iond axis offset from said first axis and normal to said plane, a shaft having one end slidably fitting said sleeve and connected for rotation about said first axis as a unit therewith, spring means urging said shaft in one direction into a limiting position of translation along said first axis, ratchet means engageable with said plate to translate the same along said axis, and means operated by translation of said shaft in said one direction to operate said ratchet means.
16. In an assembly for a combination lock, a sleeve having an axis of symmetry and a slot lying in a plane through said axis and opening outwardly along said sleeve, a plate mounted in said slot for sliding relatively to said sleeve along said axis and for pivotal movement about a second axis normal to said plane, there being a series of recesses in said plate equally spaced in a direction extending parallel with said axis, and means yieldingly urging said plate in rotation about said second axis.
17. An assembly as in claim 16, a shaft having one end slidably fitting said sleeve and having a splined connection therewith, a pawl mounted to said sleeve for sliding relatively thereto along said axis and for pivotal movement about an axis generally parallel with said plate, said pawl including a nose adapted to engage the recesses in said plate in succession, there being a cam slot in said pawl, a pin fixed with said shaft and riding in said slot, to first retract said pawl from said plate and then, while holding said pawl retracted, to axially translate said pawl by a distance equal to the spacing between contiguous ones of said recesses, by and in response to translation of said shaft.
References Cited in the file of this patent UNITED STATES PATENTS 438,505 Tate Oct. 14, 1890 481,551 Daniels Aug. 30, 1892 1,758,203 Segal May 13, 1930 1,964,157 Holtzman June 26, 1934 1,989,780 Woodward Feb. 5, 1935 FOREIGN PATENTS 164,704 Great Britain Jan. 16, 1922 581,531 Great Britain Oct. 16, 1946 Mil A-