US2230227A - Lock - Google Patents

Description

Feb. 4, 194-1. H. A. BARRETT 2,230,227

. LOCK Filed Feb. 6, 1939 2 Sheets-Sheet 1 96 INVENTOR.

H6512 iga'rr fi BY ,y

ATTORNEY.

Feb. 4, 1941. H. A. BARRETT LOCK 1939 2 Sheets-Sheet 2 Filed Feb. 6

INVENTOR 45a ATTORNEY.

Harry Patented Feb. 4, 1941 UNITED STATES LOCK Harr A. Barrett, Upper Darby Township, Delaware County, Pa.

Application February 6, 1939, Serial No. 254,974

10 Claims.

This is a continuation in part of application for Letters Patent filed by me on November 1, 1932, Serial No. 640,587, for patent on Keyless lock, which has become Patent No. 2,145,853, dated February 7, 1939. 1

My invention relates to looks and it relates more particularly to permutation or combination locks mounted in doors or other sealing means.

One object of my invention is to provide a permutation lock adapted to be relatively permanently mounted in a door or other sealing means.

Another object of my invention is to provide a permutation lock for use in doors or the like, which shall be so constructed as positively to disarrange the lock tumblers when the bolt is moved, operably to require a complete re-setting of the combination after each closing of the door.

A further object of my invention is to provide a permutation lock for use in doors or the like, wherein the use of springs has been eliminated so far as possible, and the component parts have been reduced to a minimum.

Another object of my invention is to produce a lock which is of rugged construction and pickproof, while at the same time inexpensive to manufacture.

A further object of my invention is to provide a permutation lock which may readily be perma- 1 nently mounted on locker doors or the like.

With the above and other objects in view, my invention consists of a lock housing having moveably mounted therethrough a bolt; a plurality of tumbler disks, means for rotatably mounting said tumbler disks in said housing, registrable indentations on the peripheries of said tumblers, means in pivotal connection with said bolt for abuting the periphery of at least one of said tumblers when said indentations are not in registry, and for passing into said indentations when they are in registry, operably to maintain said bolt in locked condition while the tumbler indentations are out of registry, and-to permit movement of said bolt to an unlocked condition when said indentations are in registry, and means for rotating said tumbler disks.

My invention also consists of a-lock compris-- ing a bolt and a plurality of tumblers, permutation means for bringing said tumblers in release position, and means actuated by the motion of the bolt for bringing said tumblers out of release condition.

My invention further consists of a lock comprising a bolt, 2. dog carried by said bolt, aplurality of indentation-bearing tumblers permutatively alignable, a dog-catch adapted to retain said dog in locked position when said tumblers are out of release position, and adapted to permit said dog to be withdrawn when said tumblers are in release position.

My invention also consists of a lock comprising a permutation actuated tumbler and a locking member adapted to be alternately locked and released by said tumbler and means for transposing said tumbler from release condition to locking condition as the locking member is moved into unlocking condition.

My invention further consists of the combination of a door and a lock, said lock comprising a lock mechanism, means for supporting said mechanism, a dial, means for mounting said supporting means on one portion of said door, a bearing arm supporting said dial in another portion of said door, and operatively connecting said dial with said mechanism, and means for locking said bearing arm in place.

For the purpose of illustrating my invention, I have shown in the accompanying drawings forms thereof which are at present preferred by me, since the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangements and organizations of the instrumentalities as herein shown and described.

Referring to the drawings in which like reference characters indicate like parts:

Figurel represents a front elevational view of a lock mounted in a door, embodying my invention.

Figure 2 represents a side elevational view, partly broken away, of the lock and door illustrated in Figure 1.

Figure 3 represents a vertical elevational view of the lock, unmounted, and with the dial and cover plate removed, showing the inside mechanism, embodying my invention.

Figure 4 represents a sectional View taken along the line 44 of Figure 3.

Figure 5 represents a rear elevational view of the lock mounting, embodying my invention.

Figure 6 represents a prospective view of the retaining member of the lock mounting, embodying my invention.

Figure 7 represents a perspective view of the lock cover plate embodying my invention.

Figure 8 represents a front elevational view,

partly broken away, of a modified construction of the lock embodying my invention adapted for use in locker doors of the latch bar type.

Figure 9 represents a sectional View taken along the line 99 of Figure 8.

Figure 10 is a vertical sectional view of the lock of modified construction embodying my invention.

Figure 11 represents a View similar to Figure 10, but with the locking mechanism in a released position. I v

Figure 12 is a sectional view taken along the line l2l2 of Figure 10.

According to my invention, I provide a lock housing comprising an upper wall 2|, lower wall 22, side walls 23 and 24, and rear wall 25. The upper and lower walls 2! and 22 are flanged as at 28 and 2'], respectively. The wall24 comprises a rectangular bearing 28 adapted to accommodate the lock bolt 29. A stationary shaft 38 is fixedly secured to the rear wall and projects forwardly a substantial distance through the front of the housing 28. A boss 3! concentric with the shaft 38 projects forwardly from the rear wall 25.

A substantially circular tumbler disk 32 is mounted on a shaft 38 in juxtaposition to the boss 3!. Substantially similar tumbler disks 33 and 34 are mounted on the shaft and the tumblers 32, 33 and 34 are maintained in spaced relation to each other by spacer washers 35 and 36.

The spacer washers 35 and 36 each comprises a base member 31, anchored within the closefitting groove 38 extending through a boss 39 which projects upwardly from the bottom wall 22. Arouate arms 40 and M radiate from either side of the boss 3 said arms being of a circular curvature concentric with the shaft 38 but of an internal radius slightly less than the radius of the periphery of the tumbler disks 32, 33 and 34, and an external radius slightly greater than that of the periphery of said tumbler disks. The arcuate arms 48 and 41 preferably comprise between them a semi-circular annulus. A driving lug 42 projects forwardly from the forward face of the forward tumbler disk 34 and is adapted to ride within, and be carried by the walls of, the groove or driving bearing 43 cut into the face of the rearwardly projecting bearing arm 44 o the dial 45.

A rearwardly projecting lug 48 is disposed on the rear face 41 of the forward tumbler disk 34, intermediate the'shaft 38 and the spacer washer arms 48 and 4|: and is adapted to contact and drive a co-radially disposed forwardly projecting driving lug (not shown) on the forward face of the intermediate tumbler disks 3:. in a manner similar to that of the tumbler disks shown in my cc-pending application Serial No. 640,587, filed November 1, 1932. Likewise, the tumbler disk 33 has a rearwardly projecting lug which is adapted to contact and to drive a forwardly projecting lug on the rearward tumbler disk 32. The rearward tumbler disk 32 has a rearwardly projecting lug 48 disposed close to the periphery thereof.

The bolt 29 comprises a forward face or abutment 69, a rearwardly curved camming surface 58 and a vertically disposed spring bearing wall 58. The rearward portion of the bolt 29 is fixedly secured to or preferably formed integrally with. an upright arm 52. The upper portion of the arm 52 is adapted to abut against the side wall 24 when the bolt is fully extended in the locking position, and the arm 52 projects transversely in the upperportion thereof toward the opposing side wall 23, thereby forming the upper arm 53. This upper arm 53 is spaced from the side walls 25 and 2d a total distance slightly less than the distance the bolt 29 projects out of the housing 28, and is slotted near the end thereof, opposed to the bolt end, as at 54 ina manner to receive the guide bolt 55. The slot 54 is so disposed and of such a length as to permit the bolt 29 carried by the arm 52 and 53 to be completely withdrawn into the housing 28, and to be fully extended in looking position, at will. A spring retaining pin 56 is disposed in the lower portion. of the housing and has mounted thereon a coil spring 51, one end 58 of which is anchored in the boss 39, and the other end 68 of which bears against the bearing wall 5! of the bolt 29 in a manner constantly to urge said bolt outwardly.

A dog 8| is pivotally mounted on the upper arm 53 by means of the dog retaining pivot bolt 62. A spring 33 is anchored at one end in the bearing wall 5| of the bolt 29, and bears at its other end against an arm 64, which projects forwardly and downwardly from the end of the dog 6| opposed to the pivoted end thereof, operably to urge the lower end of said arm 64 against the peripheries of the tumbler disks 32, 33 and 34. v I

A bell crank 65 is pivoted beneath the slotted end of the upper arm 53 as at 66, and has anupper, side-grooved arm 61 and a lower, transversely extending arm 68. The slotted end of the.

bolt-carrying arm 53 has downwardly projecting from the lower edge thereof, a pin 69 which moves transversely across the wide groove 1'0 in the upper arm 81 of the bell crank 85, and is adapted alternately to abut against the sides thereof in a manner intermittently to rock said bell crank. Thus, when the bolt 29 is extended outwardly into locking position, the pin 69 traverses the groove 19 and bears against one side wall II thereof, operably to rock downwardly the lower transversely extended crank arm 68; and when the bolt 29 is withdrawn into unlocking position, the pin 69 bears against the opposing side wall 12 of the groove 78, operably to rock upwardly the transverse arm 68 of the bell crank 65. transverse arm 68 extends, when in the latter position, across the path of the rearwardly projecting lug 48, and clears said path when in the former position.

Each of the tumbler disks 32, 33, and 34 has formed in the periphery thereof a notch adapted to receive the arm 64 of the dog BI, and the side wall 73 of the notch in the forwardly disposed tumbler 34 is so shaped as to engage the dog in a manner to drive the same transversely operably to transpose the bolt carrying arms 52 and 53, and the bolt 29 from alocking position to an unlocking position.

The rearwardly projecting lug 48 of the rearward tumbler disk 32 is so disposed with relation to the notch thereof, that when the arm 64 of the dog 8| is positioned within said notch, and the bolt 29 withdrawn, rocking the bell crank, 55 upardly, the transverse arm 68 thereof will be intermediate the rearwardly projecting lug 48 and said notch.

.In operation, when it is desired to withdraw the bolt 29 into unlocking position, the dial is rotated according to a predetermined permutation sequence operably to align the notches of the'tumbler disk 32, 33 and 34 beneath the arm 64 of the dog 61, substantially in the manner described in my co-pending application for Letters Patent Serial No. 640,587, filed November 1,

1932, which has become Patent No. 2,145,853,

The

dated February '7, 1939. The arm 64 of the dog 6| is then urged into the registered notches by means of the spring 63. The dial 45 is thereafter turned toward the slotted end of the upper arm 53, bringing the sides 13 of the notch in the forward tumbler disk to bear against the arm 64 operably to withdraw the bolt 29 in the manner hereinbefore described. In the withdrawing motion of the bolt 29 and the bolt carrying arms 52 and 53, the pin 69 traverses the wide groove I6 of the bell crank 65 and bears against the side 12 thereof in a manner to rock the transverse arm 68 of the bell crank 65 into a position between the notch and the rearwardly projecting lug 48 of the rearward tumbler disk 32.

As soon as the dial 45 is released, the spring 66 urges the bolt 29 back into locking position, carrying with it the upper arm 53 and the pin 69, which retraverses the wide groove I6 of the bell crank 65, and bears against the side 'II onerably to rock downwardly the transverse arm 68 of the bell crank 65 in a manner to cause said arm 68 to bear against the rearwardly projecting lug 48, looking said lug against rotation in an upward direction. The rearward tumbler 32 carrying the lug 48 is thereby prevented from being rotated by the dog 6|. In the locking movement of the bolt resulting in the movement just described, the dog 6| is carried by the bolt, and would tend to carry with it the tumbler disks into the notches of which the arm 64 of the dog 6| has been disposed. This is prevented, however, by the rearward tumbler disk 32 being prevented from rotation in that direction by the I bell crank arm 68 bearing against the rearward lug 48 of the tumbler disks 32. The dog arm 68 thereafter is cammed outwardly from the notch of the rearward tumbler disk 32, and freed. To facilitate this camming, the side wall I4 of the notch in the tumbler disk 32 is shaped in a man ner to provide a wide angle between said wall and the base of the notch. Further rotation of the bell crank 65 as the bolt 29 approaches the limit of its outward thrust, causes the bell crank arm 68 to clear the path of the rearwardly projecting lug 48, and to free said lug for permutative motion.

The tumblers 32, 33 and 34 are now disarranged and may not be brought into unlocking registry until the predetermined sequences of dial motions has been again effected.

The bolt 29, however, is free to be withdrawn and locked by its curvedv surface 56 camming against the door jamb without undue motion of the bell crank, by virtue of the wide groove I6 through which the pin 69 travels before contacting the bell crank.

A cover plate I5 of the same size and configuration as the inside edge of the housing 26 defined by the walls 2I, 22, 23 and 24 is disposed within said housing flush with the flanges 26 and 21 thereof. Opposed lugs I6 and II project from the edges I8 and I9 respectively of the cover plate I5, and register with the respective lug receiving openings 86 and BI in a manner to be held in place by the walls thereof. An opening 82 coaxial with the shaft 36 is cut through the cover plate I5 and is of a diameter sufficient to uncover the path of rotation of the driving lug 42 about the shaft 36. A forwardly extending lug 83 is struck out of the cover plate I5 at the edge of the opening 82.

The rearwardly projecting bearing arm 44 of the dial 45 passes through a circular bed plate 84 until the dial 45 abuts thereagainst, and the outer edge of the bed plate is spun into a dial retaining groove. A hub or bearing arm 85 projects rearwardly of the bed plate 84 and is preferably formed integrally therewith. The hub 85 embraces the bearing 44 of the dial 45 in a manner to permit rotation of the bearing arm therein while uncovering the rearward portion of the bearing arm 44.

A lock retaining plate 86 is secured to the wall of the door 81 by any suitable means, such as by welding, riveting, or the like. Bolt receiving portions 88 are formed in the lock retaining plate 86 in a manner to retain the head of the bolt between the plate 86 and the door 81, and to retain the shank of the bolt in a rearwardly extending position.

The hub 85 carrying the bearing arm 44 of the dial 45 passes through suitable apertures in the door 81 and the lock retaining plate 86, and is annularly grooved as at 89 in the portion thereof immediately behind the rearward face of the lock retaining plate 86. A spring, retaining member 96 having a handle portion 9|, and two side arms 92 and 93, spaced from each other a distance equal to or greater than the diameter of thegroove 89, but less than the diameter of the hub 85 is passed through the groove 89 in a manner to lock the bed plate against the front face of the door 81. If desired, the handle portion 8! of the spring retaining member 96 may fit into a suitable depression in the lock retaining plate 86. The hub 85 has formed in the rearward edge thereof, a notch 94 adapted to receive the lug 83 forwardly projecting from the cover plate I5. Bolt receiving holes 95 and 96 are formed in the respective flanges '26 and 27 of the lock housing 26.

In mounting the look on the door, the dial and bed plate assembly is positioned against the forward face of the door 81 with th hub 35* passing through the door 81, and the lock retaining plate 86. The spring retaining member is then passed through the groove 89 of the hub 85. The lock housing is then mounted on the bolts 91, rearwardly projecting through the lock retaining plate 86, with the hub groove 94 rotated into register with the lug 83 of the bed plate I5, and the dial 45 rotated until the driving bearing 43 thereof is in registry with the driving lug of the tumbler disk 34. mounted on the bolts 91 in a manner to lock the lock housing against the lock retaining plate 86.

In Figures 8-12 inclusive, I have shown a modified embodiment of my invention wherein my lock has been adapted for use on a locker of the locking bar type. Thus, there is provided a locker I66 comprising a locker housing IN, a door I62, hinged thereon at I63 and adapted to close against the door-jamb I64. A handle I65 is vertically slidably mounted on the door I62, and is secured in any suitable manner to a vertical latch bar I66 which disengageably-interlocks with the door-jamb I64. A look I6'I is mounted in the door I62 in any desired manner, with the bolt I68 of the lock I6'I projecting outwardly into a slot I69 which extends through the latch bar I66. The bolt I68 has downwardly extending from the inward portion thereof, a slotted member 6 which is mounted on a guide rail III in any suitable manner, operably to be vertically slidable thereon. A generally vertically disposed bell crank dog H2 is pivotedly mounted on the slide member II6 by means of a pivot pin II-3. On the side of the upper portion of the dog II2 opposed to the bolt side thereof I provide a wall portion H4 adapted to bear against the peripheries of a series of tumbler disks H6 rotatably mounted on a shaft H1. The tumbler disks H6 are operated by permutation means similar to those already described with respect to the lock in the lock housing 20, and are similarly spaced .by spacer washers II 8. The tumbler disks H6, however, are not notched as are the tumbler disks 32, 33 and 34, but are detruncated as at H9 so that when the detruncated portions H9 are in registry and in juxtaposition to the dog wall H4, said wall will be free to rock into an abutting relation thereto, whereas said wall is prevented from rocking by the periphery of the disks H6 when the detruncated portions H9 are not in registry.

The rearwardmost tumbler disk H6 has rearwardly projecting therefrom a lug I20 in proximity to the periphery thereof. A lug engaging arm I2I extends beneath the wall H3 of the dog H2 and is preferably formed integrally with said dog, said arm I2I extending toward the shaft Ill a distance sufficient to enable it to intercept the path of rotation thereabout of the rearwardly projecting lug 22. The rearwardly projecting lug is so disposed on the rearwardmost tumbler disk H5 that when the detruncated portion H9 of said tumbler disks H6 is in juxtaposition to the dog wall H4, the lug I20 is disposed near the lowermost portion of said detruncated portion. Thus, when the slide H0 is raised, carrying with it the dog H2, the arm I2I intercepts the lug I22 and raises it, thereby rotating the rearwardmost tumbler disk H6 operably to bring the detruncated portion H9 thereof out of registry with the detruncated portions of the remaining tumbler disks.

A pawl or dog catch I22 is pivoted beneath the tumbler disks l IS, in coplanar relation to the dog H2 by means of the pivot pin I23. The lowermost portion I24; of the catch I22 projects toward the dog 4 E2 in a manner to intercept the path of the lowermost portion or rocker arm I25 of said dog H2 when said dog is raised or lowered.

The upper side I29 of the lowermost portion I24 of the catch I22 is cammed in a manner to cause said lowermost portion I 24 to rock away from the lowermost portion I25 of the dog H2, when said portion I25 intercepts the cam I29, when the dog H2 is lowered. A finger I26 projects from the catch I22 above the pivot pin I23 thereof, and toward the dog H2 in a manner to be disposed immediately beneath the lug engaging arm I2I of the dog H2 when said dog is in its lowermost position. The upper side I39 of the finger I25 is cammed in a manner to be rocked away from the lug-engaging arm I2I, when it is intercepted by said arm when the dog I I2 is lowered. The side of the catch I22 opposed to the dog side thereof is slotted as at I21 to receive a limiting stop I 28 mounted in the housing of the lock H5 operably to limit the arc of rotation of the dog catch I22.

The lower edge I 3| of the lug engaging arm I2I is cammed in a manner to intercept the upper side E30 of the finger I26, and to rock said finger I26 transversely away from the dog I l 2 when said dog H2 is lowered. A limiting stop I32 is formed along the edge of the dog I 12 immediately below the camming edge I3I in a manner to abut against the finger I26 of the catch E22 when the dog H2 is in its lowermost position. The upper edge I33 of the lowermost portion or rocker arm I25 of the dog I i2 is inclined in a manner to abut against the lower edge I34 of the lowermost portion or latch I24 of the catch I22 when said dog I I2 is in its lowermost position, and when said latch I24 is rocked towards the dog H2. The portion I35 of the dog H2 intermediate the abutting wall I32 and the inclined'edge I33 thereof is cut away in a manner to prevent operative interference between the dog H2 and the latch I24 while the dog H2 is being lowered.

In operation, when a lifting force is applied to the handle I05, this force is transmitted through the latch bar 16 to which the handle I05 is secured, and to the bolt I08 embraced by the latch bar I06. The lifting force is then transmitted through the dog H2 and the rocker arm I25 thereof. The upper edge I33 of the rocker arm I25 bears against the lower edge I34 of the latch I24 in the dog catch and is prevented from being lifted. The door is therefore locked. But when the detruncated portions I I9 of the tum- .bler disks H6 are in registry in juxtaposition to the wall H4 of the dog H2 and the lifting force is applied to said dog, the rocker arm I25 of the dog H2 cams away from the latch I24 of the dog catch I22 while the opposing end of the dog H2 rocks into the space provided therefor by the detruncated portions I I9 of the disks I Hi. The dog H2 is then free to be lifted. Further application of the lifting force of the handle I25 raises the dog H2, and while said dog is being raised, the lug-engaging arm l2i thereof intercepts the rearwardly projecting lug I20 peripherally disposed at the base of the detruncated portion H9 of the rearwardmost disk H 6 and lifts said lug operably to disarrange the registry of the detruncated portions H9 of the tumbler disk H6. Further lifting action of the handle E25 permits the latches I36 of the latch bar H313 to clear the looking arm I3! on the door-jamb, and the door is now unlocked.

When the handle IE5 is lowered, the dog H2 linked thereto in a manner hereinbefore described, is lowered, and in the lowering process,

the wall I I4 is rocked outwardly by the circular peripheries. I38 of the disks H6 operably to rock inwardly the rocker arm I25. Further lowering motion of the dog H2 causes thelower edge of the rocker arm $25 to intercept the upper edge 829 of the latch i2 1, operably to cause said upper edge 29 to cam away from said dog H2, to permit further lowering motion thereof. Continued lowering motion of the dog causes the camming edge 53! thereof to cam against the co -acting edge E32 of the catch I22 operably to rock said catch in a reverse direction, thereby causing the latch I24 to swing into abutting relation to the inclined surface I33 of the rocker arm I25. The dog is then again locked against outward movement, and the door I 02 is again locked.

It will be noted that in this modified construction of my invention, no springs are used, the parts are few, and it is virtually impossible to pick the lock since the wall l I l bears-tangentially against the circular peripheries I38 of the tumbler disks H6, and no motion is imparted to the pended claims rather than to the foregoing description to indicate the scope oi. the invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination, a door and a lock, said lock comprising a lock housing, and lock mechanism at least a portion of which is within said housing, said mechanism comprising a locking member moveably mounted within said housing, a dog carried by said locking member, and adapted to be rocked with respect to said member; tumbler means for permitting rocking motion of said dog when said means is in release position, and for restraining rocking motion of said dog when in locking position; permutation means including a dial, to operate said tumbler, said dial being mounted in one portion of said door, said housing being mounted in another portion of said door, moveable means for transmitting motion from said dial-mounted portion to the mechanism within said housing, and means for locking said moveable means in place while permitting operative motion thereof; and means actuated by motion of said locking member for moving said tumbler from release position to locking position.

2. A look comprising a bolt, a dog carried by said bolt, a plurality of tumblers, indentations on. said tumblers, permutation means for bringing said indentations into registry in juxtaposition to said dog, spring means for urging said dog into said indentations when said indentations are in registry and in juxtaposition thereto; means for imparting motion to said dog when it is within said indentations, operably to withdraw said bolt, and means deriving motion from said bolt for bringing said tumbler indentations out of registry when said bolt is moving in another direction.

3. A look comprising a bolt; a dog connected with said bolt, said dog comprising a wall portion and a rocker arm; a pawl latch; means on one portion of said dog to bring said pawl latch into latching relation to said rocker arm; a plurality of rotatable detruncated tumblers; permutation means for aligning the detruncated portions of said tumblers in registry to said wall operably to permit said dog to rock out of latching engagement with said pawl latch; and means deriving motion from said bolt for bringing said detruncated portions of said tumblers out of registry with said Wall when said bolt is moved into unlocking position.

4. In combination, a door and a lock, said lock comprising lock mechanism, mechanism supporting means, a dial and dial retaining means, said dial being mounted on one portion of said door, said supporting means being mounted on another portion of said door, means for locking said dial retaining means in place, and means for conveying motion from said dial portion to said mechanism.

5. In combination, a door and a lock, said lock comprising a lock housing and lock mechanism at least a portion of which is within said housing, said mechanis-m comprising a locking member moveably mounted within said housing, a dog carried by said locking member, and adapted to be moved with respect to said member; tumbler means for permitting motion of said dog when said means is in release position, and for limiting motion of said dog when in locking position;

permutation means to operate said tumbler means; and means actuated by motion of said locking member for moving said tumbler mecha-- nism from release position to locking position.

6. In combination, a lock comprising a lock housing and lock mechanism at least a portion of which is Within said housing, said mechanism comprising a locking member carried by said housing and in moveable relation thereto, a dog connected with said locking member and adapted to be moved by motion of said member; tumbler means for permitting motion of said dog when said means is in release position, and for limiting motion of said dog when in locking position; permutation means to operate said tumbler means; and means for moving said tumbler mechanism from release position to locking position when said locking member is moved in at least one direction; said means including a member adapted alternately to be moved into operative and inoperative positions by positive motion imparted by the movement of said lock mechanism.

'7. A look comprising a locking member and permutation operated tumblers, said tumblers being adapted to be moved into a lock release position and into a locking position; a dog connected with said locking member and actuated by motion of said tumblers when they are in lock release position operably to move said locking member, means for imparting motion to said tumblers when they are in said release position, and means deriving motion from said locking member for moving said tumblers from lock release position to locking position.

8. A look comprising a locking member, a dog connected with said locking member, a plurality of tumblers, indentations on said tumblers, permutation means for bringing said indentations into registry in juxtaposition to said dog, means for urging said dog into said indentations when said indentations are in registry and in juxtaposition thereto; means for imparting motion to said dog when it is within said indentations, operably to move said locking member in one direction, and means deriving motion from said locking member for bringing said tumbler indentations out of registry when said locking member is moved in another direction.

9. A look comprising a locking member; a dog connected with said locking member and comprising a wall portion; a latch; means for bringing said latch'into latching relation to said dog; a plurality of tumblers having wall-receiving portions; permutation means for aligning the wallreceiving portions of said tumblers in registry to said wall operably to permit said dog to move out of latching engagement with said latch, and means deriving motion from said locking member for bringing said wall-receiving portions of said tumblers out of registry with said wall.

10. A lock comprising a locking member; a dog connected with said locking member and comprising a wall portion; a latch; means for bringing said latch into latching relation to said dog; a plurality of tumblers having wall-receiving portions; permutation means for aligning the wallreceiving portions of said tumblers in registry to said wall operably to permit said dog to move out of latching engagement with said latch.

HARRY A. BARRETT.

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