US2224875A - Combination cabinet lock - Google Patents

Description

Dec. 17, 1940. H. MACHINIST COMBINATION CABINET LOCK 2 Sheets-Sheet l Filed June l2, 1939 Dec. 17, 1940. H. MAC|||N`|ST 2,224,875

' COMBINATION CABINET LOCK Filed June l2, 1939 2 Sheets-Sheet 2 Patented Dec. 17, 1940 COlVLBINATION CABINET LOCK Harold Machinist, Chicago, Ill.. assignor to Dudley Lock Corporation, Chicago, Ill., a corporation of Illinois Application .lune 12, 1939, Serial No. 278,641

6 Claims.

This invention relates to locks, and rmore particularly to locks of the permutation type, and it is` illustrated as applied to a so-called cabinet lock adapted for various types of closures, such as lockers, wall safes, cupboards and the like.

The particular lock illustrated also includes key operable means for actuating the bolt independently of the permutation mechanism. One object of the invention is to provide a simple and dependable structure for operating the bolt of the 51 liZe for the key operation of the lock some of -the permutation mechanism in order to simplify the structure and reduce the number of parts required. The invention consists of certain features and elements in combination, as herein shown and described and as indicated by the claims.

In the drawings: i

Fig. 1` is a face view showing a cabinet lock of the type embodying this invention as mounted on a closure.

Fig. 2 is a front elevation of the lock with the cover plate removed to reveal details of the mechanism and illustrating the parts in the position which they occupy when the permutation disks have been adjusted, ready for opening the lock.

Fig. 3 is a similar elevation showing the parts shifted to the position for withdrawing the bolt.

Fig. 4 is also an elevation of the mechanism showing the parts as shiftedv part-way toward locking position.

Fig. 5 is a frontv elevation showing the parts fully shifted to locking position with the permutation disks dispersed.

Fig. 6 is a front elevation with partsin section and with the permutationmechanism removed to show connections by which the bolt may be key-operated.

Fig. 7 is a vertical section taken substantially as indicated at line l--l on Fig. 4 for indicating the relative positions of the several parts. y

As shown in the drawings, the lock mechanism is contained in a case I of rectangular outline, having flanges 2, 2 by which it may be secured against the rear face of a door or other closure, such as that indicatedat in Fig. 1. A face plate 4 is applied to the outer face of the door with a rotatable knob 5 and dial 6 associated therewith; and in the case of the illustrated lock the knob is formed with a key slot I for the introduction the parts which serve for actuating it throughl of a key, which, it may be understood, will actuate the bolt 8 independently of the permutation mechanism. The bolt 8 is slidably carried in the case by `a plate 9 which may be integral with the bolt or a` portion of it, and which is guided between the end walls I0, It)v for movement Sunicient to project the bolt through a suitable opening in the wall II or withdraw it to a position substantially flush with that wall.

within the casing and spaced from the back wall I2 a partition plate I3 provides the surface upon which the bolt plate 9 is slidably carried, and extending forwardly from the partition I3 a bearing sleeve I4 serves to journal the spindlev 50 which operates the bolt through a key mechanism, as hereinafter described; and the sleeve I4 alsoserves as a bearing for the tumbler disks I5, i6 and l1 of the permutation mechanism. The disks are separated by spacing washers I8 and are inter-engaged with each other by the usual lugs I9 projecting from adjacent faces of the tumbler disks. The outer disk I1 is formed withV a hub with notches 2| by which it is interconnected with the manually operable knob 5 the knob being journaled in an upstanding collar 22 formed on the cover plate 23 of the casing. Thus the permutation disks are adjusted in the usualway, that is, by turning the knob 5 first in one direction until, through the medium of inter-engaging lugs I9 it has picked up tumblers l5 and I 6 for rotation, then stopping at a predeterminedy point to leave the tumbler I5 in adjusted position, then turning the knob in the opposite direction until the tumbler I6 is adjusted, and nally again reversing the rotation of thek knob 5 to bring the tumbler I1 into adjustment. Such adjustment consists in aligning the notches of the Vthree, tumblers in registration with the nose 24 of a pawl 25 pivoted at 26 on the plate 9 of the bolt 8f. A spring 2'I`then swings the pawl 25 into lthe aligned notches of the disks, as shown in Fig. 2. When this occurs, a further rotation of the knob 5 in clockwise direction will transmit motion through the pawl 25 to the bolt so as'to withdraw'the bolt to the position illustrated in Fig. 3. The bolt is ofthe dead-bolt type, and thus remains adjusted at unlocking position until again moved through the operation of the knob 5.

Return movement of the bolt to locking position is accomplished by reverse rotation oi the knob 5-that is, in counter-clockwise direction, turning with it the. outer tumbler l1. The radial face 28 of the notch inthe disk Il engages the in engagement with the notches 35 by virtue of nose 24 of the pawl 25 as seen in Fig, 4, and thus drives the bolt 8 toward locking position.

However, during this reverse rotation of the knob 5 and disk I'I the other two disks I5 and I 6 are held against rotation by means of the tooth 30 of a detent member 3| carried by a pivot 32 on the plate 9. A spring 33 connecting one end of the detent 3| with an anchor pin 34 on the plate 9 normally holds the member 3| in a' position approximately tangent to the permutation disks, as seen in Fig. 2; but when the bolt 8 is retracted to the position shown in Fig. 3,

V.the tooth 30 is brought into contact with the disks, and the member 3| is swung out of alignment with its spring 33 so that the spring is stressed and thus presses the tooth 38 firmly against the peripheries of the permutation disks, as seen in Fig. 3. During the initial portion of the return stroke of the -bolt 8 toward locking position, the detent notches 35 in the disks I5 and I6 are brough into registration with the detent tooth 38. This resists rotation of the disks I5 and I6 so that as the disk I 'I is turned further by the knob 5 the nose 24 of the p-awl 25 is caused to climb the sloping faces 36 of the notches in disks I5 and I6 until the corner of the nose 24 passes the outer edge of the face 28 of the notch in disk I1.

By this time the bolt 8 has been fully projected to locking position, and further rotation of the knob and disk I'I causes the sloping face 28a of the notch in disk I`| to cam the nose 24 entirely out of the notch to the position shown in Fig. 5. With the nose 24 engaged between the face 28 of the notch in disk I1 and the sloping faces 36 in disks I5 and I6 the latter are forced to rotate a few degrees, and after the detent tooth 30 has entered the notches 35; this further stresses the spring 33 as indicated in Fig. 4, but the tooth 30 is permitted to remain the slot 38 formed in the member 3| which permits it to slide onits pivot 32 as4 seen in Fig. 4. As the nose 25 is forced out of the tumbler notches by cam surface 28a the disks I5 and I6 are released from the nose 24 and are rotated in clockwise direction through a considerable distance as the stressed spring 33 expends its force through the tooth 38. Contraction of the spring 33 returns the detent member 3| to its normal position tangent to the tumbler disks and just out of contact therewith, as shown in Fig. 5. The extent of rotation of the disks I5 and I6 produced by the detent, will depend primarily upon friction,-between the disks and their spacing washens I8 andat other points,- but, in any event, it will be suflicient to throw the disks out of the position in which their large notches would register with the nose 24 of the pawl 25. And the final counter-clockwise rotation of the knob 5 involving the effort of sliding the bolt 8 to locking position, will insure that the disk II will be turned somewhat beyond its position for registration with the nose 24; in fact, it must be turned beyond that position to permit the cam surface 28a to function, as already described. Therefore, when the bolt has been fully shifted to locking position all three tumblers will be turned out of their position of registered adjustment, and the combination must be completely reset before the bolt can again be actuated by the knob 5. Y

For actuation of the bolt 8 and its plate 9 by means of a key, and independently of the permutation mechanism, there'is provided a plate 4|] which, as shown in Figs. 6 and 7, is mounted between the back wall |2 and the partition I3. The spindle 50 journaled in the sleeve I4 may be understood as inter-engaged with any suitable key-operated cylinder lock, denoted at 4I in Fig. '7, and having its key slot I presented at the outer end of the knob 5. Insertion of the proper key in the slot 1 and rotation of the spindle 50 thereby turns an arm 42 against the edge 43 of a cam-shaped opening in the plate 40 and thus shifts the plate within the casing I by the distance necessary for withdrawing the bolt 8 from locking to unlocking position. The plate 40 carries an upstanding lug 44 which engages against the end 45 of a slot 46 in the plate 9 for thus withdrawing the bolt. In the normal position of the permutation mechanism, as illustrated in Fig. 5, the end of the pawl 25 engages against the opposite edge 4'I of the lug 44 and the presence of the tumbler disks in their unregistered relation prevents the pawl from becoming disengaged from this edge of the lug. Therefore, when reverse rotation of the key in the lock 4| causes return movement of the plate 40 its lug 44 drives the bolt plate 9 and its bolt 8 back to locking position.

The upstanding lug 44 includes an obliquely bent portion 48 which functions in cooperation with the permutation mechanism. As the knob 5 is rotated to unlock the bolt 8 it drags the bolt j to unlocking position by virtue vof the engagement of the pawl nose 24 in the notches of the tumbler disks, and particularly in the notch of disk II. The face 28b of the notch in disk I'I is inclined so as to maintain engagement with the pawl nose 24 as well as possible, but to insure such engagement the oblique portion 48 of the lug 44 acts as a guard to hold the pawl in the notch of the tumbler.

While there is shown and described herein certain specific structure embodying the invention, it will be manifest to those skilled in the art that various modifications and rearrangements of the parts may -be made without departing from the spirit and scope of the invention, and that the same is not limited to the particular form herein shown and described, except in so far as indicated by the appended claims.

I claim:

1. A lock including a case, a bolt slidable there- In, a plurality of notched tumbler disks rotatable in the case, a pawl connected to the bolt and engageable in the tumbler notches when they are adjusted in registered relation, rotation of the tumblers in one direction thus serving to shift the bolt to unlocking position and reverse rotation of the tumblers shifting the bolt back to locking position, the notch of one of said tumblers having one side inclined to the radius, and means for checking the reverse rotation of such tumbler, whereby the inclined side of its notch acts to eject the pawl as the latter is moved by continued reverse rotation of another tumbler in the locking movement.

2. A lock including a case, a bolt slidable therein, a plurality of notched tumbler disks rotatable in the case, a pawl connected to the bolt and engageable in the tumbler notches when they are adjusted in registered relation, rotation of the tumblers in one direction thus serving to shift the bolt to unlocking position and reverse rotation of the tumblers shifting the bolt back to locking position, the notch of one of said tumblers having one side inclined to the radius, and means for checking the reverse rotation of such tumbler, whereby the inclined side of its notch acts to partially eject the pawl as the latter is driven by continued reverse rotation of another tumbler in lockingr direction, the engaged notch of said other tumbler having the outer portion of one edge also inclined to the radius for acting as a cam to complete the ejection of the pawl as the locking movement is completed.

3. A lock including a case, a bolt slidable therein, a plurality of notched tumbler disks rotatable in the case, a pawl connected to the bolt and engageable in the tumbler notches when they are adjusted in registered relation, whereby rotation of the tumblers in one direction serves to shift the bolt to unlocking position and reverse rotation of the tumblers shifts the bolt back toy locking position, yielding means engageable with at least one of the tumblers during its reverse rotation and yieldingly opposing such movement, together with means for ejecting the pawl at the completion of the locking movement of the bolt whereupon said yielding means forcibly rotates the said tumbler out of registered relation.

4. A lock including a case, a bolt slidable therel in, a plurality of notched tumbler disks rotatable in the case, a pawl connected to the bolt and engageable in the tumbler notches when they are adjusted in registered relation, whereby rotation of the tumblers in one direction serves to shift the bolt to unlocking position, and reverse rotation of the tumblers shifts the bolt back to lockel ing position, a detent device carried by the bolt and positioned to be engaged with at least one f of the tumblers by the movement of the bolt,

said detent acting to check reverse rotation of the tumbler during the locking movement'of the bolt, the notches of said tumbler and of another tumbler being formed* to cooperate for ejecting the pawl by virtue of the relative rotation of the tumblers which is effected by checking reverse rotation of one of them.

5. A lock including a case, a bolt slidable therein, a plurality of notched tumbler disks rotatable in the case, a pawl connected to the bolt and engageable inthe tumbler notches when they are adjusted in registered relation, whereby vrotation of the tumblers in one direction serves to shift the bolt to unlocking position, and reverse rotation of the tumblers shifts the bolt back to locking position, a movable detent carried by the bolt and normally out of contact with the tumblers when the bolt stands at locking position, said detent being engaged with one of the tumblers by movement of the bolt and including yielding means whereby it yieldingly opposes reverse rotation of such tumbler, and means for ejecting the pawl from the tumbler notches at the Icompletion of the locking movement of the bolt whereupon said yielding means forcibly rotates the said tumbler out of registered relation.

6. A lock including a case, a bolt slidable therein, a plurality of notched tumbler disks rotatable l in the case, a pawl connected to the bolt and engageable in the tumbler notches when they are adjusted in registered relation, whereby rotation of the tumblers in one direction serves to shift the bolt to unlocking position, and reverse rotation of the tumblers shifts the bolt back to lock ing position, a detent device pivotally carried by the bolt and engageable with one of the tumblersas the bolt is retracted, the pivotal mounting of the detent providing play which permits return movement of the bolt without corresponding movement of the detent, and yielding means reacting between the bolt and detent and arranged to be stressed by such return movement of the bolt, together with means for ejecting the pawl from the tumbler notches upon completion of the locking movement whereupon said yielding means takes up the play in the connection and causes the detent to forcibly rotate the tum bler out of registered relation.

HAROLD MACHINIST.

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