US1888647A - Permutation lock - Google Patents

Description

NOV. 22, R W|NN|NG 1,888,647

' PERMUTATION LOCK Filed Sept. 22, 1950 2 Sheets-Sheet 1 Nov. 22, 1 932. R. K. WINNING v 1,888,647

PERMUTA TION LOCK Filed Sept. 22, 1950 2 Sheets-Sheet 2 llllllllnmm:mu v

Patented Nov. 22, 1932 RLEtSSUED UNITED STATES PATENT OFFICE ROBERT K. WINNING, OF WAUWATOSA, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE DUDLEY LOCK CORPORATION, OF CHICAGO, ILLINOIS, A CORPORA- type.

TION OF ILLINOIS PEBMUTATION LOCK Application filed September 22, 1930. Serial No. 483,481.

I am aware that attempts have previously been made to produce an arrangement for utilizing pressure of the shackle to engage the bolt therewith in a lock of this general It is my present specific purpose to make a relatively simple device in which the parts will be rugged and their action certain to the end that difliculties heretofore encountered may be eliminated.

In the drawings:

Figure v1 isa front elevation of a lock case from which the permutation mechanism has been removed to expose in the bottom of the case the particular parts having principally to do with the present invention.

Figure 2 is a view showing the same parts with the locking disk of the permutation mechanism superimposed thereon.

Figure 3 shows the parts as they appear when the shackle is pressed to open the lock.

Figure 4 shows the final position of the parts as the shackle is withdrawn.

Figure 5 shows the parts as they appear during a subsequent downward movement of the shackle.

Figure 6 shows the parts in the position which they occupy as the shackle reaches its downwardmost position.

Figure 7 is a view of the complete lock 1n transverse cross section on the line shown at 7-7 in Fig. 1.

Like parts are identified by the same reference character throughout the several views.

The lock is of the general type illustrated in the United States Letters Patent No. 1,7 36,- 183 dated November lt), 1929 in which a lock case 8 is provided internally with a mount ng plate 9 having an upturned car 10 for guldlng shackle 11. A central post is provlded at 12 upon which permutation disks 13 and 14 are guided, the disk 15 being connected with the respective hub portion 16 of a knob 17 ournaled in the cover 18 for thecase.

The mounting plate 9 also carries posts 19 for the spacer members 20 which are formed as illustrated in Figure 5 of said patent and are interposed between successive disks of the permutation device. The final disk 13 of the series is shown in Figures 2 to 7 inclu 'sive and is provided at 23 with a notch into which the flange keeper portion 2 1 of the oscillatory bolt 25 is receivable when said notch is aligned with the corresponding notches of the other disks and in registry with flange 24.

The free arm of the shackle 11 is also notched at 26', its faces at opposite sides of the notch being inclined from its inside surface toward its end. The end of the-free arm of the shackle 11 is correspondingly beveled at 27. The structure thus far described is illustrated in the above identified patent. I shall now refer to features which have been 1added for the purpose of the present inven- Beneath disk 13 and separated therefrom by a special spacer 28 is a" pawl carrying lever 30 of the peculiar form clearly shown in Fig. 1. At one end it is provided with an open bearing 31 while at the other it carries pivotally' a pawl 32 of which the free or active end carries a lug 33 and torsion spring 34: tends to throw the free end of the pawl toward the post 12 upon which lever 30 is fulcrumed.

Overlying the bolt 25 and the bearing end of the pawl carrying lever 30 is an actuating lever 35 carrying a pin .36 engaged in the open bearing 31 of lever 30. Lever 35 has an upturned flange at 37 notched to serve as anchorage for the torsion spring 38 as best shown in Fig. 7 and adapted also to provide a bearing surface for the beveled end 27 of the shackle.

-With the parts shown in Fig. 1, the permutation disks are manipulated until their notches register with the keeper flange 24 of bolt 25 as illustrated by the position of disk 13 in Fig. 2. The permutation mechanism now being in a position to permlt the opening of the lock, the operator W11].

press on the bight of the shackle to move the shackle against the spring 40 toward the position illustrated in Fig. 3. The beveled surface 27 of the shackle will ride upon the inclined margin 41 of the bolt to oscillate the bolt counterclockwise about its fulcrum pin 42. flange 24 into notch 23. At the same time the beveled surface 27 of the shackle engages flange 37 of the actuating lever to oscillate this lever also in a counterclockwise direction about its fulcrum pin 44.

The counterclockwise oscillation of lever 35 produces clockwise oscillation of lever 30. While the movement of these parts performs no function at this particular time due to the fact that the pawl lug 33 is not engaged in any of the peripheral notches of disk 13, the movement has been described for the reason that it is necessary in this device to provide for such movement and to make provision also for guarding against displacement of disk 13 as the result of such'movement.

With the parts in the position illustrated in Fig. 3 the shackle may now be withdrawn. The distorted spring 40 will assist in its initial outward movement toward the position in which the shackle is illustrated in Fig. 4. In the course ofsuch outward movement the end portion of the shackle beyond notch 26 will engage the inclined end face of the keeper flange 24 to force the keeper flange to its ultimate position in the notch 23 of permutation disk 13. The withdrawal of the shackle allows spring 38 to force lever 35 in a clockwise direction as viewed in Figure 4 beyond the original positionin which such lever was held by the shackle in the Fig. 2' disposition of the parts. Obviously the movement of lever 35 is transmitted'through pin 36 to lever 30 and as a result of the new extreme position of lever 30 the lug 33 of the ratchet dog 32 passes 7 about the periphery of permutation disk 13 to a point where it will be sure of engagement with one of the notches 45 during its return movement.-

'The ultimate position of the levers is defined by the engagement of notched portion 46. of lever 35 with the keeper flange 24. It is particularly to be noted that in this position of the parts as shown in Fig. 4 the lever 35 acts as a compression member to restrain keeper 24 from any movement out of engagement with notch 23 of the permutation disk. The importantresult of thisinteraction of the parts is to prevent any displacement either of the keeper or the disk while the hasp is withdrawn. There is sufficient lost motion between the position of lug 33 in Fig. 4 and the shoulder of the nearest adjacent notch 45 so that the portion 46 of lever 35 which per forms the obstructing function just described will move out of the way as shown in Fig. 5 before lug 33 is fully engaged with notch 45 and the rotation of disk 13 is commenced.

This motion is permitted by entry of the When it is desired to lock the shackle, it is subjected to pressure tending to force its shorter end into the lock casing, which it enters as shown in Fig. 5. .Its initial engagement with the bearing flange 37 of lever 35 will cause a counterclockwise movement of lever 35 and a corresponding clockwise movement of lever 30'which will have the efiect of engaging lug 33 snugly in the adjacent notch 45 and removing portion 46 of lever 35 from the path of the keeper as aforesaid.

The succeeding movement of the shackle 11 under continued pressure exerted by the operator will cause. a continued movement of lev'ers 35 and 30 in the respective directions just described, and the engagement of lug 33 with permutation disk 13 will produce clockwise rotation of such disk to the position in which it is illustrated in Fig. 6. It will be noted that the direction of thrust ofjthe lefthand edge of the notch, 23, of said disk upon end of the shackle will be somewhat distorted and consequently, upon release of the shackle by the operator, the spring 40 will force the shackle back to the position in which it is illustrated in Figs. 1 and 2, thereby engaging the keeper flange 24 to its full depth in notch 26 and allowing levers 35 and 30 to return to a position in which the lug 33 is disengaged from permutation disk 13.

It is particularly to be noted that the normal locked position of the parts is such that the levers 35 and 30 are both intermediate the ends of their paths of movement. It. is this fact, taken with the multiplication of movement afforded by-the use of the levers 35 and 30, which ensures the accurate and positive interaction of the parts. It is not until the shackle is unlocked and partially withdrawn from the lock casing that lug 33 engages permutation disk 13 and the relatively large angular rotation of such disk produced by a relatively short movement of the shackle after it re-enters the casing positively moves the disk out of registry with the keeper.

Another important means of securing accuracy is the use of a pawl carrying lever 30 which is fulcrumed @directly on post 12 and the pawl of which is engaged directly with the periphery of disk 13.

To prevent the permutation disk from un desired rotative displacement and particularly to protect disk 13 from displacement such as might otherwise be occasioned by,.the frictional engagement of lug 33 with its periphery, I prefer to employ a small compression spring at 48 on post 12 which maintains intimate contact between the permutation disks and the several spacers 20 and 28. The resulting action is equivalent to that of a friction clutch tending to hold each disk stationary until it is positively displaced.

I claim:

1. A permutation lock provided with means for utilizing the entering movement of its shackle for engaging a keeper therewith, said means comprising the combination with a permutation disk provided with means for interacting with a keeper, of a pair of levers in motion transmitting connection, one of said levers being pivoted co-axially with said disk and provided with means engageable with said disk for the rotation thereof and normally'disengaged therefrom, the other of said levers being positioned for operation by a portion of said shackle.

2. In a permutation lock, the combination with a notched shackle, a notched permutation disk, and a keeper alternatively engageable therewith, of a stop member movable to a position of engagement with the keeper when the latter is engaged in the notch of said disk and adapted in said position to restrain said keeper from disengagement, a spring pressing said stop member toward said posi-v tion, and means on said stop member with which said shackle is normally engageable when locked to maintain said stop member in a retracted position such as to permit free movement of said keeper.

' 3. In a permutation lock, the combination with a notched shackle, a notched permutation disk, and a keeper alternatively engageable therewith, of a stop member movable to a position of engagement with the keeper when the latter is engaged in the notch ofssaid disk and adapted in said position to restrain said keeper from disengagement, a spring pressing said stop member toward said position, and means on said stop member with which said shackle is normally engageable when locked to maintain said stop member in a retracted position such as to permitvfree movement of said keeper, together with lost motion connections from saidstop member to said disk for the rotation of said disk in a direction to disengage the keeper therefrom following the movement of said stop member to its retracted position, i .1

4. In a permutation lock, the combination with rotatable means provided withperipheral notches, of a bolt member having a keeper portion movable into cooperative engagement with a notch of said means, and connections for the rotation of said means in a direction to cause the wall of said notch to act cam-wise on the keeper portion and dis I engage it from said notch, said connections comprising a dog carrying lever having a dog engageable with said means, and a second with notched rotatable means and a keeper having a portion engageable in a notch of said means, of connections for the rotation of said means in a direction to cause a wall of said notch to act cam-wise on said keeper portionfor shifting it out of said notch, said connections comprising a pawl carrier 1111 crumed co-axially with said means and a pawl engageable with said means, a lever in pivotal connection with said pawl carrier at a radius less than that of said means, and a shackle with which said keeper is engageable upon its disengagement from said means, said shackle being movable in a path whereby it is engageable with said lever closely adjacent its fulcrum for oscillation of said lever in a direction to rotate said means through said carrier and pawl.

6. In a permutation lock, the combination with a shackle, a keeper, and a permutation disk havin its periphery provided with a plurality 0% notches, of motion transmitting connections acting directly upon said notched periphery of the disk for rotating it in a direction to disengage the keeper therefrom, and including a member disposed in the path of movement of a portion of the shackle to receive motion from it.

7. In a permutation lock, the combination with a notched shackle, a permutation disk .having its periphery provided with a plurality of notches, and a keeper alternatively engageable with a notch of the permutation disk or shackle; of a ratchet pawl positioned to interact directly with the notches of the disk, and motion-multiplying connections for I .riphery provided with a plurality of notches,

a ratchetpawl engageable with said notched periphery of the disk, and motion-multiplying connections operatively connected with the ratchet pawl and including a member disposed in the path of movement of a portion of said locking element, whereby actuation of said connections causes said ratchetpawl to rotate said disk and'thereby shift the keeper into operative engagement with the locking element. 1

ROBERT WINNING.

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