US2063708A

US2063708A - Lock

Info

Publication number: US2063708A
Application number: US15997A
Authority: US
Inventors: Swilens Charles
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-04-12
Filing date: 1935-04-12
Publication date: 1936-12-08
Anticipated expiration: 1953-12-08

Description

c. s'wlLENs LOCK ' Filed April 12, 1955 5 Sheets-Sheet l 9 Vg 9 M Dec. s, 1936.

C. SWILENS LOCK Filed April 12, 1935 C. SWILENS Dec. s, 1936.`

LOCK

5 Sheets-Sheet 5 Filed April 12, 1955 Dec. s, 1936. SWILENS' 2,063,708

LOCK

Filed April l2, 1935 5 Sheets-Sheet 4 Dec. 8, 1936. c. swlLENs v 2,063,708

LOCK

Filed April 12, 1955 5 sheets-sheet 5 Patented Dec. 8, 1936 UNITED YSTATES PATENT oFFics 18 Claims.

My invention relates to a combined lock and latching mechanism fordoors, preferably for use with dwellings, apartments, oflices, and the like, and preferably of the mortise type variety where 5 the lock casing is mortised or otherwise seated in an opening formed in the door.

The primary object of my invention is the provision of a lock and latching mechanism which secures the door in locked position against unauthorized opening or picking of the lock, and is adapted to afford a mechanism of safety against unauthorized opening by the use of skeleton keys, lock picks, and the like.

Another object of my invention is the provision of a locking mechanism for doors in which the locking means is capable of being placed in varying positions whereby the locking mechanism can be actuated by a key from one side of the lock only, thereby reducing the opportunities to use skeleton keys, lock picks or the like for unauthorized opening of the door, the locking mechanism being capable of being changed to a different position whereby the same key will lock and unlock the mechanism from the opposite side of the door to that just mentioned, but cannot operate the locking mechanism from the iirst mentioned side. In other words, in the normal operation of the locking mechanism the locking apparatus is operable from one side of the lock only.

Another and further object of my invention is the provision of locking mechanism adapted to be actuated by the usual key and which, when placed in proper position in the key post, rotates the key post and a part of the actuating mechanism without aligning the tumblers properly, thereby allowing the locking post to be operated freely but without the danger of twisting a key oi in the lock or breaking portions of the locking mechanism if excessive force is applied to the key.

A further object of the invention is a combined latching and locking mechanism having operable means therefor, preferably in the form of the usual door knobs, with a connecting shaft extending therethrough, and which is so constructed that when the latch is in locked position the knobs are freely rotatable without putting undue strain or force upon the locking mechanism o1' allowing injury to be sustained by the locking mechanism if undue force is applied to the locking means.

A still further object of my invention is the provision of a lock which provides means for slightly altering the position of the lockingl tum- 55: blers thereby altering the lock in such manner that the effective use of the key for opening it is destroyed and making it necessary to obtain a new key which is used for opening the lock, as a protection against lost keys and the like.

Still another object of my invention is the provision of a door lock having a latching mechanism which is adapted to be used with right or left swinging doors, the door latch being reversible in the casing so that its angular disposed face will engage a striking plate usually secured to the door frame. f

Another and further object of my invention is the provision of a lock casing having the locking parts positioned therein to which access can be had from one side only, preferably the inside i1 used upon a dwelling, so that it is impossible to obtain access to the tumblers or other operating parts for the purpose of picking or otherwise 'unauthorizedly opening the lock.

Another and further object of my invention is the provision of a simple, efficient lock which is cheap to manufacture, and which provides a measure of security against unauthorized opening or picking of the lock. I

These and other objects of my invention will be more fully and better understood by reference to the accompanying sheets of drawings, in which- Figure 1 is a side view, partially in section, partially in elevation of the lock installed in a door, with the locking bolt in locked position;

Figure 2 is a view similar to Figure 1 with the parts in the same relative position except that the locking bolt is in unlocked position;

Figure 3 is a View similar to Figures 1 and 2, in which the locking mechaniism has been shifted to a different position in the lock casing and showing the locking bolt in unlocked position;

Figure 4 is a vertical sectional view on line 4 4 of Figure 1; y

Figure 5 is an elevational view of one of the knobs with the outer shell removed,

Figure 6 is a sectional view on line 6-6 of Figure 1;

Figure 7 is a. detailed view, partially in eleva- 45 tion and partially in section, on line 1`1 of Figure 1;

Figure 8 is a perspective View of one of the tumblers used in the lock;

Figure 9 is a transverse sectional View on line 50 9-9 of Figure 1; and

Figure 10 is a detailed sectional View on line Ill-Ill of Figure 1.

Referring now specifically to the drawings, and in which like reference characters refer to like 55 parts throughout, a door Ill is shown having a lock casing designated as a whole as l I located therein. The lock casing I I comprises two members placed in side to side relation with each other, one member having a side wall l2, a top wall I3, a bottom Wall i4, and a front wall I5 having the usual latch and locking bolt openings therein, the side, top, bottom and front walls being lformed integrally with the side wall l2, as is the usual practice with lock casings of this type. The other member comprises a cover plate l5 having a rear wall portion l'I integrally formed therewith, and which is adapted to iit against the edges of the wall portions of the side wall i2. A guide block iB is mounted against the side wall I2 at the upper side thereof, and a lower guide block i9 is mounted against the side Wall I2 at the lower side thereof, both guide blocks abutting against the front wall I5, with hollow studs 25, 2E! being provided toward the rear side of the side wall i which are internally threaded and have screws 2l, 2i positioned therein, with similar screws extending into the blocks I8 and I9 for holding the two members of the casing together. A face plate 22 is provided which is fitted against the front wall i5 and which is secured to the casing by any appropriate fastening means as by screws extending outwardly through

ears

23, 23 integrally formed with the wall of the casing or secured thereto in any manner that may be desired.

In the lower part of the casing a locking bolt 24 is mounted in` sliding engagement with the lower guide block i9, and upon

guide lugs

25, 25 spaced apart from each other and secured to the locking bolt 25 in any approved manner. The rear end 25 of the locking bolt is bifurcated and has a star wheel

2l having teeth

28, 23 thereon, mounted upon a pin 29 extending through the bifurcated portions of the rear end 26 of the locking bolt 24. A movable friction lug 30 is mounted in the biiurcated end 25 of the locking bolt 24 having a pin 3i secured thereto, with an opening 32 extending longitudinally of the locking bolt adapted to receive a spring 33 which surrounds the pin 3l for the major portion of its length. The spring 33 forces the friction lug 35 in engagement with the ends of the teeth 28 on the star wheel 2l, the ends of these teeth being provided with angular ends as will be noted, in order to hold the star wheel 2l against easy rotation. Mounted in the locking bolt 24 is a pivotally mounted locking arm 34 having a pin 35 extending therethrough and forming a mounting for the locking arm 35. The locking bolt 24 has a transverse extending bore Sformedthereinwithin which a pin 3l is mounted having a spring 38 extending therearound, the head of the pin extending under one end of the locking arm 34 and normally tending to hold the locking arm 34 in position against a stop 35 which is positioned by means of a pointed screw 40 extending through the side of the locking bolt 24, and providing means by which the locking arm 34 is held in a plurality of adjusted positions. The transverse hole 35 extends entirely through the locking bar 24 and is of suiiicient size to accommodate the pin 3i and spring 33, but is decreased in size at the lower side of the bolt 24, thereby forming an annular shoulder to support the spring 38. The pin 3l in both the locked and unlocked position of the locking belt 24 is forced downward by the locking arm 34 into holes |92', I 9a, and forms one of the means by which the locking bolt 24 is held against movement. The locking arm 34 extends upwardly and rearwardly from the locking bolt and has cam surfaces 4I on the lower side thereof, with arcuate recesses between the cam surfaces 4I for purposes hereinafter described, and has a locking pin 42, preferably rectangular in shape, for engagement with the locking tumblers hereinafter described, extending therethrough and projecting therefrom on each side.

Mounted in the casing I I is a block 42a, which is mounted on guides 43 and 44 respectively, placed against the side plate I2, with a threaded opening therethrough within which a worm 45 is mounted. The worm 45 has a shaft 46 extending therethrough, preferably rectangular in cross section on the inner end, on the outer end of which a thumb button 4l is placed, the button having an annular channel 48 extending therearound. The shaft 46 has a spring 49 extending therearound seated inside of the worm member 45, and has a thimble 5I) thereon the inner end of which forms an abutting member for the spring 49, the opposite end of the spring abutting against a shoulder formed on the inner are of the worm 45, the spring 49 being normally held in compressed position within the worm 45. Mounted in a recess in the face plate 22 is a sliding latch member 5I having a spring 52 therein adapted to engage against a pin 53 in the face plate 22, with a finger piece 54 extending outward at the lower end thereof which extends through a recess in the face plate 22. The upper end of the member 5I is adapted to be seated in the annular channel 48 in the normal position of the lock with the heads countersunk in the face plate 22 so that a smooth surface is presented, but when the member 5I is pushed downward, the spring 49 forces the shaft 46 outward so that the worm member 45 can be rotated, thereby shifting the block 42a and tumblers to dii-ferent positions, as will be hereinafter described.

The block 42a at the lower side thereof has a rearwardly extending portion 55, and a tumbler supporting member 55 mounted in an opening formed in the block 421L in the lower side thereof. The member 56 has a slot 5'I therein within which a spring 58 is positioned which seats against a pin 59 extending through the slot 5'I and the member 42a. The member 56 also has a slot at one side which extends over the base portion of the member 55 and in sliding engagement therewith so that this member is normally held in the position shown in Figure 1, but may be slightly retracted against the pressure of the spring 58 during the operation of the lock.

The member 56 has a depending portion Si) projecting below the member 5221, with a plurality of tumblers 6I, 6I pivotally mounted thereon by means of a pin 62, the tumblers six in number as shown being mounted three on one side of the depending portion 60 and three on the other side in side to side relation with each other. The tumblers Si each have springs 64 secured thereto which are adapted to engage under the portion 55 of the block 42a, and have rectangular openings therein, the front opening being designated as 65, the intermediate opening as 65, and the rear opening as 61. Connecting the

openings

55 and 55 is a slot 6B which is narrow at its front portion and diverges outwardly, terminating in the recess 66, with shoulders adjacent the recess 65 which are adapted to engage the transversely extending locking pin 42 mounted in the rear end of the locking arm 34. The locking pin 42 is adapted to engage in the openings 66 and 51 in the unlocked and locked positions of the locking bolt 24 shown in Figures l and 2, and in the

openings

65 and 66 in the unlocked and locked positions of the locking bolt 24 as shown in Figure 3.

A key post 69 is mounted in the lock casing having a key slot 10 therein, and comprising annular outer portions adapted to engage against the side plates |2 and |6 respectively, with a central annular portion 1| being provided having a projection 12 thereon. In its upper position the projection 12 is adapted to engage the under side of the locking arm 34 and passes over the cam surfaces 4|, and normally in either the locked or unlocked position of the door is in register with one of the arcuate recesses adjacent the cam surfaces 4|, this position being necessary in order' to properly align the key slot in the annular portions of the key post 69 with the key slot in the plates |2 and I6 of the lock casing in order that a key may be inserted and withdrawn from the key post 69. As the key post 69 is rotated, the projection 12 also engages the teeth 28 on the star wheel 21 for the purpose of operating the locking bolt 24. If the locking pin 42 in the locking arm 34 is free of the locking tumblers, the locking bolt 24 slides easily in its position in the casing and can be moved to locked or unlocked position as the key post is rotated and the projection 12 engages in thestar wheel'21. If, however, when the key is inserted in the lock the locking pin 42 is in engagement with any of the tumblers, the key post rotates in the lock casing, in which case the star wheel 21 is rotated by the key post, the locking bolt 24 thereby not being actuated by the key, the key post rotating freely in the lock casing, the only resistance thereto being that created by the friction exerted on the outer surface of the projection 12 as it passes over the cam surface 4| on the rear end of the locking bar, and the frictional resistance Droduced by the friction between the friction lug Sil and the ends of the teeth 28 on the star wheel 21.

If, however, as the key is rotated in the key post the key aligns the tumblers in such manner that the transversely extending locking pin 42 in the rear end of the locking arm 34 is free of the edges of the rectangular shaped transversely extending openings in the tumblers 6| and in alignment with the longitudinally extending slots therein, the locking bar is thereby released as the projection 12 engages in the star wheel 2. The friction created between the ends of the teeth 28 and the member 36 is sufcient to overcome the resistance of movement of the looking bolt 24 and the locking bolt 24 is moved into locked or unlocked position as may be desired.

With respect to the position of the parts shown in Figure 2, when it is desired to operate the lock, the key is inserted in the locking post 69 which, in the normal position has the key slot extending downward, in which position the key is rotated in a clockwise direction when it is desired to lock a door. With the first movement of rotation of the key post 6B the member 12 is moved out of the arcuate recess adjacent the cam surface 4| on the under side of the rear end of the locking arm 34, in which position the springs B4 push the tumblers down until their lower sides rest on the barrel portion of the key post (shown in Figure 4), and the locking arm 34 is pushed into the position where it rests upon the end of the pin 39 by the action of the spring 38 which also lifts the pin 31 out of the rear hole i92L in the yguide blockl I9. Continued rotation o f the key posty 69 through the operation of the key brings the projection 12 into engagement with the star wheel 21 and at the same time the key comes into engagement with the under side of the tumblers 6|, lifting all of the tumblers and aligning them until the locking pin-l2 is disengaged from the upper side of the recess 66, and in alignment with the slots 68 in the tumblers. In this position the locking bolt 24 is movedfor- Ward by combined rotation of the key post, and continued rotation of the key brings the projection 12 up into engagement with the under side of the locking arrn 34 along the camming surface, which in effect raises the locking arm 34 slightly and also lifts the tumblers. The tumblers are shifted forward slightly as the locking arm 34 moves about the pin 35 slightly shifting the tumbler supporting member 56, in which position the bolt is projecting from` the lock in locked position. As the rear end of the locking arm 34 is lifted, its front end forces the pin 31 into engagement with the guide block IS and into the front hole I9a therein, which with the engagement of the locking pin 42 in the tumblers securely retains the locking bolt 24 in position. Due to the lifting of the rear end of the locking arm 34 the whole locking mechanism is placed under spring tension by the action of the springs 64 on the locking tumblers and the spring 58 in the block 42a.

If, however, the key post should be rotated further so that the projection 12 is out of engagement with the locking pin, then the springs on the tumblers would force the tumblers down so that the locking member 42 would still be in engagement with the tumblers and not be released therefrom.

It will be understood, of course, that the key, after the locking operation, is removed from the lock and when it is desired to unlock the door to which the lock is secured, the key is inserted in the locking post and turned in a counterclockwise direction when the reverse operation takes place, the tumblers properly aligned and the locking bolt withdrawn.

When it is desired to set the lock for operation of the key on the side opposite to that hereinabove described, the nger piece 54 is pushed downward against the spring 52, releasing the shaft 46, which is forced outward to dotted position shown in Figure 6. The worm 45 is rotated so that the block 42a is drawn toward the forward edge of the casing carrying with it the tumblers 6|, this operation taking place preferably when the lock is in unlocked position, thereby drawing the locking bolt 24 forward at the same time. The key is thereupon inserted and upon being turned in a clockwise direction actuates the tumblers and withdraws the locking bolt. The shaft 46 in the meantime is pressed back into position in the recess in the face plate 22 and the door is in position to be locked after being closed, if desired.

The same key is used for operating the lock from either side of the lock casing, but due to the cutting of the tumbler recesses in the key the locking mechanism cannot be actuated from both sides when the locking tumblers are in the same position. In cutting the tumbler slots in the key the same general relationship must be maintained, that is, say No. 1 tumbler from one side is lifted a predetermined distance to release the locking pin 42, when the keyis reversed it must lift No. 6 tumbler the proper distance, taking into account the fact that the key in lifting the tumblers actuates them from two positions with respect to the radius of movement of the tumblers about their aXes of movementI in the pin 62. In other words, the tumbler recesses in the key are cut to raise the tumblers in proper relationship with each other depending upon which side of the locking arm 34 they are positioned. In this manner the key will operate only from one side of the lock at any particular setting.

A latch 'I3 is mounted in the upper side of the casing, having a slot 14 extending longitudinally thereof within which a spring 'l5 is mounted. A post 16 is provided having a projection at one side thereof adapted to be received into the spring l5, the post 'i6 being secured to the side plate l2 in any approved manner. The rear end of the latch 'F3 is U-shaped, the legs thereof being bifurcated, and has pins TI located adjacent the end of the U-portions, upon which suitable rollers are mounted between the bifurcated portions of each of the legs for engagement with the cam portions 'I8 of a latch actuating member i9, having a square opening therein adapted to receive an operating shaft extending from the operating knobs, so that a turning movement of the member 'i9 causes the cam portions to withdraw the latch 'I3 into the casing |l. One side of the latch i3 at the outer end thereof is angularly disposed for engagement with a striking plate and may be removed from the casing and its position reversed, with the angular side toward the opposite side to that shown in the drawings, thus enabling the lock to be used on either right or left hand doors.

A shank is provided having a squared end portion 8| which ts into the squared opening in the member 19. On the outer end of the shank is a knob shell 82 having a transverse plate 83 extending thereacross, with a pair of bars 84, 84 also extending across the knob shell, with a pair of

cam members

85 and 86 being provided which are adapted to engage the rectangular shaped end of a shaft 81. The shaft 81 extends through the knob shank 89 and into another knob shank 88 at the opposite side of the door and into a knob 89, preferably made of two shell sections similar to the sections heretofore described but without the cam members therein. The Shaft 87 has a key-way 99 at one end thereof with an annular collar 9| thereon adjacent to plate 83, which holds the shaft in Xed relation in the knob shell 82. The knob shank 88 has a projection 92 adapted to fit into the key-way 99 in the shaft 81 so that the knob and knob section 88 are held against rotation on the end of the shaft 81, and a turning force applied to the knob tends to rotate the shaft 87|.

Mounted in the

cam members

85 and 86 in the knob section 82 is a pair of

springs

93, 93 respectively, which exert their pressure upon the

members

85 and 86 and hold these members into engagement with the rectangular shaped end of the shaft 81 so that the knob sections 82 and 84 can be turned upon the shaft against the resistance of the springs 93, which resistance is sufficient to overcome the resistance of the spring 15 in the latch 13. Mounted in the lock casing is a locking member 94 having a shoulder 95 thereon and having a pin 96 at its opposite end to provide pivotal mounting for the member 94, and in the opposite end a slot is formed in which a spring 9'! is positioned adapted to engage against a pin 98 in the side plate l2, which pin extends into the slot in the end of the member 94. A crank member 99 is provided having a pin |09 therein, the crank member being mounted between the side plates |2 and I9 with a squared opening |0| therein having a pin |02 adapted to form a stop for the crank member 99 in the position of this member as shown in Figures 1 and 2 of the drawings.

In encasing the lock in the door lll the usual escutcheon plates |93 and |94 are provided, one of which has studs |95, |05 inserted therethrough and passing through the door l to the opposite side of the door where they are adapted to receive screws |96, |98, preferably on the inner side of the door which prevents unauthoriz-ed removal of the escutcheon plates. A button |07 extends thro-ugh one of these plates having a squared shaft |08 thereon which is adapted to be received in the squared opening of the member 99 for operation of, this member to bring the locking member 9d', up into position where it engages the rear end of the latch member 13, as shown particularly in Figure 3. This provides an additional safeguard for locking the latch member '|3 and when in this position the door knobs on either side may be rotated, in which case the springs 93 are compressed, allowing the cam members 85, 8G to pass around the shaft 81 and thereby forming a loose knob mounting which prevents any turning force being applied thereto which might break some operating parts of the lock or the like. When the latch member 94| is dropped down so that it clears the end of the latch member, the springs 93 overcome the resistance of the spring I5 mounted in the latch 13, the latch can be freely operated by means of turning the knobs in either direction for the purpose of opening and closing the door.

Suitable key guides |99, |99 are placed in the escutcheon plates |93 and |04, having key slots therein in register with the key slot in the post, through which the key is inserted for engagement with the key post and which serves to prevent access to the key post except through the narrow slots in the key guides, thereby preventing unauthorized access to the locking parts.

In applying the lock to a door, the key guides |09, |09 are first placed in the escutcheon plates by removing the washers l0 from the barrels of the key guides |69, placing the barrel portions through the plates, placing the washers H9, H0 over the inner ends thereof, and then passing screws in an outward direction through the washers l0 and into the barrel of the key guides, thus effectively securing these key guides to the escutcheon plates. The escutcheon plates have sockets formed therein for Jthe reception of the knob shanks, which have annular members on the ends thereof of larger outside diameter than the shank openings in the escutcheon plates. Screws I2 pass through these annular members and into the door knob shanks so that the door knobs are held firmly against removal from the escutcheon plates. The knob shanks are secured to the escutcheon plates prior to the application of the escutcheon plates to the door I9, and when applied have the screws |96 inserted from the inner side of the door, so that unauthorized access to the lock or any of its parts after it is applied to a door is reduced to a minimum.

The operation of my improved lock it is believed will be quite fully understood from the foregoing description. I prefer to depend upon the latch locking mechanism for the locking of the door against unauthorized movement from 75v the inside, and therefore in operation the member |01 is preferably adapted to be mounted on the inside of the door. When it is desired to lock the door, this member is turned in such manner that the bell crank member 9S is turned upward so the pin I lifts the locking member 94 up into engagement with the end of the latch 13. In this position the latch is held against retraction and if an attempt is made to open the door either of the knobs rotate Without moving the latch member out of engagement with the door casing. In vthis position, if it is desired to lock the door after passing through it, the key is used, in which position the tumblers are properly set for operation of. the key from the opposite side of the door on which the member |01 is mounted. This adjustment is made by releasing the shaft 46 and rotating the Worm 45, shifting the tumblers to proper position so the key will operate the door from the proper side and the door is locked by use of a key. Thereafter the key is inserted from the outer side of the door and can be used to unlock it by the simple operation of rotating the key and throwing the locking bolt 24 into Withdrawn position.

In case these operations are reversed, the face plates |04 are reversed when the door is installed, and the tumblers set in such manner that they function in a different location so that the locking mechanism can be used with either right or left hand doors.

While I have described more or less precisely the details of. construction, I do not Wish to be understood as limiting myself thereto, as I contemplate changes in form and the proportion of parts and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention.

I claim:

l. A lock comp-rising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, means on said arm adapted to engage said tumblers, a key post adapted to actuate said locking bolt, and means on said locking bolt capable of engagement with said key post, said means being normally held in a predetermined position but capable of movement without actuating said locking bolt.

2. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, means on said arm adapted to engage said tumblers, a key post adapted to actuate said locking bolt, a rotatably mounted member in said bolt adapted to be engaged by said key post, and means whereby the said rotatably mounted member is normally held against rotation.

3. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, means on said arm adapted to engage said tumblers, a key post adapted to actuate said locking bolt, a Wheel on said locking bolt for engagement With said key post, and friction means capable of normally holding said Wheel against rotation.

4. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein with channels connecting said recesses, a locking member on said locking arm adapted to extend into the recesses and channels of said 'tumblers, a movable base on which said tumblers are mounted, a key post, and means on said key post capable of actuating said locking bolt.

5. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein with channels connecting said recesses, a locking member on said locking arm adapted to extend into the recesses and channels of said tumblers, a movable base on which said tumblers are mounted, means whereby the said base is shifted to a plurality of adjusted positions, a key post, and means on said key post capable of actuating said locking bolt.

6. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein with channels connecting said recesses, a locking member on said locking arm adapted t0 extend into the recesses and channels of said tumblers, a movable block in said casing, a tumbler supporting member mounted thereon, a key post, and means on said key post capable of actuating said locking bolt.

7. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein with channels connecting said recesses, a locking member on said locking arm adapted to extend into the recesses and channels of said tumblers, a movable block in said casing, means for moving said block to a plurality of adjusted positions, a tumbler mounting member on said block, a key post, and means on said key post capable of actuating said locking bolt.

8. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein With channels connecting said recesses, a locking member on said locking arm adapted to extend into the recesses and channels of said tumblers, a movable block in said casing, a worm on which said block is mounted, a tumbler mounting member on. saidblock, a key post, and means on said key post capable of actuating said locking bolt.

9. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein With channels connecting said recesses at the centers thereof, a locking member on said locking arm adapted to extend into the recesses and channels of said tumblers, av movable block in said casing on which said tumblers are mounted, a tumbler supporting member mounted therein, a key post, and means on said key post capable of actuating said locking bolt.

10. A lock comprising, inV combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted tumblers having a plurality of recesses therein with channels connecting said recesses at the centers thereof, said recesses extending on each side of the said channels, a locking member on said locking arm adapted to extend into the recesses and channels of said tumblers, a movable block in said casing on which said tumblers are mounted, a tumbler supporting member mounted therein, a key post, and means on said key post capable of actuating said locking bolt.

1l. A lock comprising, in combination, a casing, a locking bolt mounted therein, a locking arm on said locking bolt, pivotally mounted turnblers having a plurality of recesses therein with channels connecting said recesses, a locking member on said locking arm adapted to extend into the recesses and channels of said tumblers, a movable block in said casing on which said tumblers are mounted, means for moving said block to a plurality of adjusted positions, thereby shifting the said tumblers to different predetermined positions, a tumbler mounting member on said block, a key post, and means on said key post capable of actuating said locking bolt and said locking arm.

l2. A lock comprising, in combination, a casing, a locking bolt slidingly mounted therein, a movable locking arm on said locking bolt, locking means carried by said bolt actuated by said locking arm, a plurality of pivotally mounted tumblers, means on said arm adapted to engage said tumblers, a key post adapted to actuate said locking bolt and said locking arm, a rotatably mounted member in said bolt adapted to engage said key post, and means whereby the said rotatably mounted member is normally held against rotation.

13. A lock comprising, in combination7 a casing, a locking bolt slidably mounted therein, a pivotally mounted locking arm on said locking bolt, a spring-pressed locking pin mounted in said locking bolt adapted to be actuated by said locking arm, a plurality of pivotally mounted tumblers, means on said arm adapted to engage said tumblers, a key post adapted to actuate said locking bolt and said locking arm, a rotatably mounted member in said bolt adapted to engage said key post, and means whereby said rotatably mounted member is normally held against rotation, the said casing having a recess therein into which the spring-pressed locking pin is adapted to be received in both the locked and unlocked position of the bolt.

14. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a pivotally mounted locking arm on said locking bolt, a plurality of locking means, a key post adapted to actuate the locking means, a rotatably mounted member in said bolt adapted to be engaged by the key post, and means whereby the said rotatably mounted member is normally held against rotation.

15. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, a bar on said locking arm adapted to be engaged by said tumblers when in locked position, a rotatable key post adapted to actuate said locking bolt, a wheel on said locking bolt adapted to engage with the key post, and a friction member in engagement with said wheel.

16. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, a bar on said locking arm adapted to be engaged by said tumblers when in locked position, a rotatable key post adapted to actuate said locking bolt, a wheel on said locking bolt adapted to engage with the key post, and a spring-pressed friction member in engagement with said wheel.

17. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, a bar on said locking arm adapted to be engaged by said tumblers when in locked position, a rotatable key post adapted to actuate said locking bolt, a wheel on said locking bolt adapted to engage with the key post, a slidably mounted friction member engaging said wheel, and a spring adapted to hold said friction member in engagement with said wheel.

18. A lock comprising, in combination, a casing, a locking bolt slidably mounted therein, a locking arm on said locking bolt, a plurality of pivotally mounted tumblers, a bar on said locking arm adapted to engage said tumblers when in locked position, a rotatably mounted key post adapted to actuate said locking bolt, a rotatably mounted toothed wheel on said locking bolt adapted to engage with the key post, a friction member on said bolt adapted to engage the teeth on said wheel, and a spring adapted to hold said friction member in engagement with said wheel.

CHARLES SWILENS