US2148226A

US2148226A - Padlock

Info

Publication number: US2148226A
Application number: US555660A
Authority: US
Inventors: Gedor W Aldeen
Original assignee: AMERICAN CABINET HARDWARE CORP
Current assignee: AMERICAN CABINET HARDWARE CORP
Priority date: 1931-08-07
Filing date: 1931-08-07
Publication date: 1939-02-21
Anticipated expiration: 1956-02-21

Description

G. W.:ALDEEN 2,148,226

PADLOCK Feb. 21; 1939.

Patented Feb. 21, 1939 UNITED STATES PATENT OFFICE PADLOCK Application August '7, 1931, Serial No. 555,660

22 Claims.

The invention relates generally to padlocks and more particularly to a padlock which may be opened by a permutation mechanism.

The general object of the invention is to provide a new and improved padlock of this type in which the combination is destroyed by the act of locking.

Another object is to provide a padlock of this type in which movement of the shackle to its closed position causes the combination to be destroyed and the shackle to be locked in such position.

A further object is to provide a padlock of this character which, in addition to having a permutation mechanism, has a key-operated mechanism operable only when the permutation mechanism is set at a predetermined combination, and in which said combination is not affected by the means for destroying the combination at which the padlock may be opened by the permutation mechanism alone.

Still another object is to provide a new and improved padlock of this type in which the permutation mechanism may be set by means responsive to the sense of touch as well as by visible means.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawing, in which:

Figure l is a face view of a padlock embodying the features of the invention.

Fig. 2 is a view of the padlock with the cover 7 plate removed and with the mechanism therein in its locked position.

Fig. 3 is a view similar to Fig. 2 but showing the position of the mechanism when the shackle is being inserted.

Fig. 4. is aview similar to Fig. 2 but showing the mechanism when operated by a key.

Fig. 5 is a sectional view taken substantially along the line 5-5 of Fig. 1.

Fig. 6 is a view showing the means for operating the permutation mechanism, which is responsive to the sense of touch.

Fig. 7 is a fragmentary sectional view taken substantially on the line 1-1 of Fig. 2.

The present invention provides a padlock having two selectively operable mechanisms by which it may be opened. One of said mechanisms is permutation-operated and includes a plurality of notched disks which, when alined, permit a bolt locking the shackle of the padlock to release said shackle. On moving the shackle back into its closed position, the bolt is automatically thrown into engagement therewith, and the! alinement of,the disks is destroyed so that the shackle can not again be released without resetting the permutation mechanism.

The other mechanism is key-operated, but before operation thereof the permutation disks must first be set to aline a different set of notches. When the shackle has been released by means of the key and it is desired to close it again, the means for disalining the permutation 10 disks is rendered ineffective.

The invention also includes, in addition to the visible means for setting the permutation disks, 2. means for setting said disks through the sense of touch. A padlock having such means 15 may thus be easily opened in the dark or by a blind person.

The padlock is generally of the type shown in my copending application Serial No. 484,071, filed September 24, 1930 and, as shown in the 20 drawing, comprises a casing having a side Wall l0 substantially cylindrical in form and having an integral rear wall II and a front plate ll secured to the side wall [0. Inserted through apertures in the side wall In is a shackle I2 25 having one end l3 releasably secured within the casing and the other end l4 slidably secured therein. The end l3 when released is adapted to be withdrawn from the casing while the end [4 slides therein. When the end I3 is so With- 30 drawn the entire shackle may be rotated about the axis of the end l4.

To look the end l3 of the shackle within the casing, a bolt l5 (see Fig. 2) is provided which has a cavity IS in its side forming a lug I1 35 adapted to engage a notch cut in the side of the end 13 of the shackle. The bolt is pivotally supported within the casing as by a pin I8.

Pivotal movement of the bolt to disengage it from the shackle is controlled by a permutation mechanism of the type shown in said copending application and comprising a plurality of disks 2|], in the present instance three disks, rotatably mounted on a spindle 2l centrally of the casing and pressed forwardly in the casing by a spring l9 bearing against a plate I9 Each disk 20 has a notch 22 out in its edge which when alined with the notches in the other disks, permits engagement therewith of a tongue 23 formed on the inner side of the bolt I 5 near its free end. When the notches 22 are so alined, outward movement of the end 13 of the shackle cams the bolt out of engagement therewith and into engamement With he notches 22.

Means is provided for yieldably holding the bolt in any position to which it is moved to prevent it from jarring out of position. This means comprises, in the present instance, a pair of balls 24 positioned in an aperture in the free end of the bolt and spring-pressed outwardly respectively against the rear wall II and the front plate ll of the casing. Thus, the pressure of the balls 24 against the rear wall and the front plate yieldably retain the bolt in any position to which it is moved.

The disks 2!! are set by means of a knob 25 mounted on the front of the casing and having a shank 26 to which the front disk 20 is rigidly secured. The other two disks are rotated by means of lugs formed on their faces and abutting against corresponding lugs formed on the front disk and on each other. The shank 26 also carries a graduated dial 2'! which cooperates with a fixed mark on a face plate 28 secured over the front plate ll of the casing.

The padlock, as in the case of. the padlock shown in my copending application, also includes a second mechanism for opening the lock, which mechanism is key-operated and is mounted rearwardly of the plate l9 in the casing. As illustrated in the drawing, the key-operated mechanism comprises a pair of plates adapted to be cammed by rotation of a key. One of said plates, indicated at 30, is adapted to be moved at right angles to the second plate 3| and is provided with a fence which must be moved to a predetermined position before the second plate 3| can be moved. The second plate is provided with a cam slot 32 in which the pivot pin l8 of the bolt is mounted, and on movement of the plate 3|, the bolt is moved circumferentially around the casing and out of engagement with the shackle, as shown in Fig. 4.

As a means to prevent the key-operated mechanism from being picked, some of the permutation disks 2|] are provided with a second set of notches which must be alined in a predetermined position before the first plate 30 can be moved.

'In the present instance, the two rear disks 20 are provided with such notches, indicated at 33, in Fig. 4. Cooperating with the notches is a finger 34 carried by the first plate 30. Thus, the first plate can not be moved until the notches 33 are positioned opposite the finger 34, and the key-operated mechanism is rendered inoperable unless the notches are so positioned.

As mentioned above, a feature of the present invention is to provide means for automatically throwing the bolt out of engagement with the permutation disks and into engagement with the shackle when the end I 3 thereof is reinserted into the casing. Thus the shackle will be automatically locked when inserted into the casing. Said means, in the present instance, is actuated by the slidable end l4 of the shackle on inward movement thereof and comprises a lever 40 pivotally supported preferably on the spindle 2| for the permutation disks between the plate It and the plates of the key-operated mechanism. One end of the lever 40 carries a lug 4| adapted to be struck by the slidable end l4 of the shackle on inward movement thereof and to be swung thereby. The other end-of the lever extends toward the bolt l5 and has a lug 42 adapted to abut against a finger 43 extending from] the inner side of the bolt l5 and spaced from the pivot I8. Thus, on inward movement of the shackle, the slidable end l4 swings the lever 40 which, in turn, swings the bolt out of engagement with the permutation disks and into engagement with the end l3 of the shackle.

When the end [3 of the shackle is withdrawn from the casing, it cams the bolt out of engagement therewith and into engagement with the disks. At the same time, the bolt swings the lever 46 to such position that it may be actuated by the slidable end M of the shackle, and the bolt is yieldably retained in such position by the balls 24 until it is moved. back into engagement with the shackle by the lever.

When the bolt is moved circumferentially by the key-operated mechanism to release the shackle, as shown in Fig. 4, the lever 40 remains stationary and is ineffective, the cam slot 32 causing the bolt to move back into engagement with the shackle.

In schools where a great many padlocks of the type shown herein are used, it has been found that a student when closing his padlock will merely give the dial a fraction of a turn after the shackle is inserted, so that when he next desires to open it he need only turn the dial back an equal amount. In turning the dial but a fraction of a turn, the front permutation disk only is disalined so that the bolt is actually looked, but the lock may be easily picked.

To prevent such practice and to make sure that the bolt is securely locked when the shackle is inserted, the present invention also has the feature of destroying the setting of the permutation mechanism in such a manner that all the permutation disks must be reset before the lock may be opened. To attain this result, it will be evident that, if only the rear permutation disk be disalined, then all the disks must be reset, since the rear disk cannot be reset without rotating both of the other disks.

As shown herein, the means for destroying the setting of the disks acts not only on the rear disk but also on the middle disk. Said means is of such a character that it will throw said two disks out of alinement by variable amounts, depending upon how easily they may be rotated and upon the particular manner of movement of the shackle on being inserted in the casing. Thus, the amount of disalinement cannot accurately be determined. Said means is resilient in character and is constructed to store up energy on inward movement of the shackle, and is automatically releasable to destroy the setting of the permutation mechanism when the bolt is moved to its locking position by the lever 40, said lever thus acting as a trigger for said means.

This means comprises, in the present instance, a plate 50 loosely carried on the slidable end I4 of the shackle as by a headed screw 5| extending through an elongated aperture in the plate 50 and threaded into the end of the shackle. The plate 50 extends toward the permutaion disks and its edge is adapted to engage a third set of notches 52 (see Fig. 3) cut in the rear and middle disks, which are alined when the notches 22, to receive the bolt, are alined. On outward movement of the shackle, the plate 50 is carried along therewith and slides over the edges of the disks, the latter being held against movement by the bolt which has been cammed out of engagement with the shackle and into engagement with the disks.

On inward movement of the shackle, the edge of the plate 50 engages the notches 52 in the rear and middle disks. Since the plate 50 is loosely mounted on the slidable end I4 of the shackle, it may pivot relative thereto to permit the edge of the plate to remain in the notches 52, the disks being held against rotation by the bolt. When the slidable end I4 of the shackle reaches the point where it strikes the lug M on the lever 40, the latter will swing the bolt out of engagement with the disks.

Means is provided to snap the plate 50, at this point, back into its normal position on the shackle, as shown in Fig. 2, and to rotate the rear and middle disks by such movement. As illustrated, said means comprises a resiliently mounted member 53 having one end bent to fit over the edge of the plate 50 and its other end pivotally supported in the corner formed by the side wall III of the casing and a plate 54 fixedly supported in the casing to guide the slidable end I4 of the shackle. A spring 55 is interposed between the member 53 and the adjacent side wall I causing the member 53 to bear against plate 50 and tending to prevent the latter from pivoting relative to the shackle.

Since the plate 50 rotates the rear and middle disks through its snapping action due to the spring 55, how far the disks will rotate after the plate 50 moves out of contact therewith will depend on the frictional resistance to such rotation. The action of the plate 50 may also be somewhat modified by the manner of inward movement of the shackle. Thus, if the shackle is given a sharp, quick inward movement, the disks will be rotated farther. In view of these factors, it is evident that the disks may be rotated in variable amounts.

Since the bolt when in engagement with the disks prevents the disalining means from acting, and since the lever 40 moves the bolt out of engagement with the disks and thus releases the disalining means, the lever 40 constitutes a trigger for said means, the lever 40 being moved by inward movement of the shackle.

Another feature of the invention is to prevent inward movement of the shackle except when the releasable end I3 enters its aperture in the casing, the purpose being to prevent throwing of the bolt and destroying the setting of the permutation disks, if it were attempted to move the slidable end I4 inwardly when the releasable end I3 is swung away from the casing. In the present instance, this feature is attained by providing means on the slidable end I4 preventing inward movement thereof except when it is rotated so that the releasable end I3 is alined with its aperture in the casing. Said means preferably comprises a pin 60 (see Fig. 7) extending radially from the side of the slidable end I4 and adapted to pass through a notch 6| cut in the fixed plate 54 supporting the slidable end I4. If the shackle is not properly positioned so that the releasable end I3 will enter its aperture in" the casing, the pin 50 strikes the outer face of the fixed plate 54 to prevent inward movement of the shackle.

When the lock is opened by the key-operated mechanism, on inward movement of the shackle, the plate 50 is inefiective to disaline the permutation disks since the disks are held against rotation by the finger 34 of the key-operated mechanism. Also, since the disks are set in a different position for operation of the key-operated mechanism than for the permutation mechanism, the notches 52, into which the plate 50 fits, are not alined, so that the plate 50 merely slides along the edges of the disks without rotating them.

As mentioned above, the invention also includes, in addition to the visible means for setting the permutation disks, a means for setting said disks through the sense of touch. To this end, a disk I0 (see Figs. 5 and 6), serving as a counter, is rigidly secured on the shank 26 of the knob 25 for rotation therewith, and is positioned between the front plate II and the dial 21. A plurality of notches II are out in the periphery of the disk Ill and one of them, indicated at I2, is deeper than the others.

The notches are adapted to receive a manually movable finger I3 formed on a member slidably supported in a slot in the front plate II by a pair of ears I4 resting on said front plate. The outer end of the member 15 extends through an aperture in the side wall I0 of the casing so that it may be pressed inwardly by the thumb or finger when the lock is held in the hand. By pressing inwardly on the member I5 as the disk III is rotated, the position of the notches II may be detected and the deeper notch I2 may be distinguished from the others.

The deeper notch I2 is so positioned on the disk I0 that it is in position to receive the finger I3 when the zero mark on the dial 21, which is also rotated with the knob 25, is at the fixed mark on the face plate 28. Thus, the notches may be counted from the deeper notch through the sense of touch in a similar manner to setting the dial by the marks thereon.

In the operation of the lock, when it is desired to open it by the permutation mechanism, the notches 22 in the disks are alined by rotating the knob 25. When the disks are so alined, the shackle may be pulled outwardly, the releasable end I3 camming the bolt I5 out of engagement with the shackle and into engagement with the notches 22. Such movement of the bolt swings the lever 40 to a position where it may be actuated by the shackle on inward movement thereof. When the releasable end I3 of the shackle has been withdrawn from the easing, the shackle may be turned about the axis of the slidable end I4, but inward movement thereof is prevented by the pin 60 unless the releasable end I3 is alined with its aperture in the casing. During the outward movement of the shackle, the plate 50, carried by the slidable end I4, wipes along the edges of the rear and middle permutation disks past the notches 52 therein, the disks being held against rotation by the bolt.

To close the lock, the shackle is turned so that its releasable end I3 is alined with the aperture in the casing and the pin 60 is alined with the notch 6| in the fixed plate 54 supporting the shackle. The shackle may then be pushed inwardly of the casing, the plate 50 engaging the notches 52 in the disks during such movement. When the slidable end I4 strikes the lug M on the lever 49, it pivots the lever, which movement swings the bolt out of engagement with the permutation disks and into engagement with the releasable end I3 of the shackle. The plate 50 has meanwhile pivoted on the slidable end I4 due to its engagement with notches 52 in the disks, so that as soon as the bolt releases the disks, the action of the spring 55 and the member 53 on the plate 5|] causes the latter to rotate the disks out of alinement.

Since the rear and middle disks are the ones so disalined, the permutation mechanism must be completely reset before the lock can again be opened by that means.

If it is desired to open the lock by the keyoperated mechanism, the rear and middle disks of the permutation mechanism are set so that.

the notches 33 are alined to receive the finger 34 on the first plate 30. On rotation of the key, the first plate 30 is cammed so that the finger 34 enters the notches 33 and so that the fence carried by the first plate permits movement of the second plate 3 l. The key then moves the second plate so that its cam slot 32 moves the bolt I5 circumferentiallyout of engagement with the releasable end I3 of the shackle permitting it to be withdrawn. Such movement of the bolt is away from the lever 40, so that the lever will not be actuated when the shackle is later moved inwardly.

When the shackle is again moved inwardly to close the lock, the plate 50 merely wipes over the edges of the disks since the notches 52 are not alined, and since the disks are held against rotation by the finger 34. The bolt [5 is moved back into engagement with the shackle by reverse rotation of the key.

If it is desired to operate the permutation mechanism in the dark when the marks on the dial 2'! cannot be seen, the sliding member may be pressed so that its finger 13 engages the notches in the disk 10. The permutation disks may then be set to the required positions by counting the number of notches from the deeper notch 12, as indicated through the sliding member 15, as the knob 25 is rotated.

From the above description, it will be apparent that I have provided a padlock in which the setting of the permutation mechanism will be destroyed by the act of looking so that the mechanism will have to be completely reset before it roan again be opened. But the means for so destroying the setting is rendered inoperative to destroy the setting which cooperates with the key-operated mechanism. The lock herein shown is also provided with means which prevents destroying the setting unless the shackle is in a proper position to be locked. It is also evident that the lock may be operated through the sense of touch as well as by sight.

I.claim as my invention:

1. A padlock comprising, in combination, a casing, a shackle having one end slidably secured in said casing, a bolt for locking the other end of said shackle in said casing, a permutation mechanism in said casing comprising a pluralty of notched disks adapted when alined to permit the bolt to be swung to release the shackle, a lever adapted to be swung by movement of said shackle for moving said bolt to its locking position, and resilient means carried by said shackle and operable with a snap action on movement of the shackle to disaline said disks when the bolt is moved to its locked position.

2. A padlock comprising, in combination, a casing, a shackle having its ends extending into the casing, one end being removable therefrom, a bolt for locking said removable end in the casing, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit the bolt to be swung to release said removable end, a lever for moving said bolt to its locking position actuated by the other. end of the shackle, and a resiliently mounted member actuated by said other end of the shackle for rotating said disks when the bolt is moved to its locked position.

3. A padlock comprising, in combination, a casing, a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit said bolt to be moved out of locking position, and constituting an abutment preventing movement of said bolt when disalined, a device actuated by said shackle for moving said bolt to its locking position, and resilient means operated by closing movement of said shackle on closing movement and having a snap action for destroying the alinement of said disks when said bolt is moved to its locking position. I

4. A padlock comprising, in combination, a casing, a shackle, a bolt for locking said shackle, a permutation mechanism adapted when set at a predetermined combination to permit said bolt to be moved out of locking position, and a device constructed for storing up energy connected to said shackle and operated by inward movement thereof and automatically releasable by movement of the bolt to its locking position to destroy the setting of said permutation mecha- IllSIl'l.

5. In a padlock, the combination of a shackle, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit the shackle to be opened, and resilient means moved into contact with said disks on inward movement of the shackle operable on said inward movement to store up energy and releasable to disaline one or more of said disks under the control of said inward movement.

6. In a padlock, the combination of a shackle, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit the shackle to be opened, and means carried by the shackle and operable for disalining one or more of said disks, the inward movement of the shackle storing up energy in said means and controlling the release thereof.

7. In a padlock, the combination of a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit the bolt to be moved out of engagement with said shackle and into engagement with said disks, a plate loosely carried by said shackle and adapted to engage the edges of said disks on movement of said shackle, and resilient means bearing against said plate and arranged to cause said plate to rotate said disks on inward movement of the shackle and following disengaging movement of the bolt from said disks.

8. In a padlock, the combination of a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit the bolt to be moved out of engagement with said shackle and into engagement with said disks, a plate pivotally supported on said shackle for movement about an axis transverse to said shackle, said plate being adapted to engage the edges of said disks on movement of said shackle, and a re siliently mounted member bearing against said plate and arranged to cause said plate to swing about its pivot to rotate said disks on inward movement of the shackle and following disengaging movement of the bolt from said disks.

9. In a padlock, the combination of a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of notched disks adapted when alined to permit the bolt to be moved out of engagement with said shackle and into engagement with said disks, a plate having an elongated hole fitting over one end of said shackle, one edge of said plate being adapted to engage the edges of said disks on movement of said shackle, and a resiliently mounted member bearing against the opposite edge of said plate and arranged to cause said plate to rotate. said disks on inward, movement. of the shackle and following disengaging movement of the bolt from said disks.

- .10.. In a padlock, the combination of a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of rotatable disks having notches in their respective peripheries adapted when alined to permit the bolt to be moved out of engagement with said shackle and into engagement with said notches, means for rotating one of said disks, and cooperating abutments formed on the disks whereby the other disks maybe rotated? by said one disk, and means operated by movement of said shackle and operable with a snap action for rotating the disk farthest from said one disk on inward movement of the shackle and following disengaging movement of the bolt from said disks.

11. In a padlock, the combination of a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of rotatable disks having a set of notches adapted when alined to permit the bolt to be moved out of engagement with said shackle and into engagement with said notches, some of said disks respectively having other notches, and a plate carried by said shackle and adapted to enter edgewise into said other notches on movement of said shackle for rotating said disks when the bolt is disengaged therefrom.

12. In a padlock, the combination of a shackle, a bolt for locking said shackle, a permutation mechanism comprising a plurality of disks having one set of notches which when alined permit the bolt to be swung out of engagement with said shackle and into engagement with said notches, said disks having a second set of notches, means coacting with said second set of notches for disalining said disks when the bolt is disengaged therefrom, and a key-operated mechanism for disengaging the bolt from said shackle including a finger, said disks having a third set of notches adapted to receive said finger to permit operation of said key-operated mechanism, said finger preventing disalining of said disks by said disalining means.

13. A padlock comprising, in combination, a casing, a shackle having one end slidably secured in said casing, the other end of said shackle being withdrawable therefrom, a bolt for locking said other end in the casing, a permutation mechanism adapted when set to permit said bolt to release said other end of the shackle, a device mounted in said casing for swinging said bolt into engagement with said other end of the shackle and actuated by inward movement of said shackle, and means to prevent inward movement of said slidable end except when said'other end enters said casing.

14. In a padlock, the combination of a casing, a shackle, a bolt movable into and out of engagement with said shackle, means mounted in said bolt and having a frictional engagement with said casing for retaining said bolt in any position to which it is moved, cam means formed on said shackle for forcing said bolt out of engagement therewith when the shackle is pulled outwardly of the casing, and means operable by the inward movement of said shackle for moving said bolt into engagement therewith.

15. In a padlock, the combination of a casing, a shackle having one end permanently secured within said casing, a pivoted bolt adapted to be swung into and out of engagement with the other end of said shackle and having a finger formed thereon, a permutation device adapted when set at a predetermined combination to permit said bolt to be swung out of engagement with said other end of the shackle, cam means formed on said other end adapted to cam said bolt out of engagement therewith on outward movement thereof, and a lever having one end in engagement with said one end of said shackle and its other end in engagement with said finger and adapted to swing said bolt into engagement with said shackle on inward movement thereof.

16. In a padlock, the combination of a casing, a shackle, a bolt movable into and out of engagement with said shackle, a permutation mechanism comprising a spindle and a plurality of notched disks rotatably mounted thereon and adapted when alined to permit said bolt to be moved out of engagement with said shackle, and a lever pivotally supported on said spindle and actuated by inward movement of said shackle to swing the bolt into engagement therewith.

17. In a padlock, the combination of a shackle, a permutation device comprising a plurality of disks adapted when alined to permit the shackle to be unlocked, a device cooperating with one of said disks for storing up energy on movement of the shackle and adapted when released to disaline one of said disks, and a trigger operated by inward movement of the shackle for releasing said device.

18. In a padlock, the combination of a shackle, a permutation device comprising a spindle and a plurality of disks rotatably mounted on the spindle and adapted when alined to permit the shackle to be unlocked, a device cooperating with one of said disks for storing up energy on movement of the shackle and adapted when released to disaline one of said disks, and a trigger pivotally mounted on said spindle and operated by inward movement of the shackle for releasing said device.

19. In a permutation lock, the combination with a tumbler provided with a notch, a bolt retractable into said notch and a shackle en gageable by said bolt pending its retraction, of a tumbler disarranging pawl, a spring acting on said pawl in a direction to throw said tumbler notch out of registry with said bolt, and means whereby said spring is tensioned by the movement of said shackle.

20. In a lock, the combination with a shackle and a bolt provided with mutually interacting parts adapted to restrain the shackle in locked position pending withdrawal of the bolt, a tumbler controlling withdrawal of the bolt, said tumbler and bolt having interacting parts preventing movement of said tumbler when said bolt is withdrawn, said bolt when in withdrawn position being adapted to receive said shackle for subsequent locking engagement, and yielding friction means for restraining the bolt against movement from its locked position or from its withdrawn, shackle receiving position, whereby to permit ready reengagement of the shackle with said bolt.

21. In a permutation look, a lock casing, a shackle mounted in the casing having one end adapted to be released from engagement therein, a locking pawl mounted in the casing and engageable with said releasable end of the shackle, tumbler mechanism including a series of disks adapted to be adjusted in a predetermined combination which permits said pawl to release the end of the shackle, and means engageable by the other end of the shackle as the releasable end re-enters the casing for positively dis-arranging the tumbler disks.

22. In a permutation padlock, a casing, a shackle mounted in the casing having one end adapted to be releasedfrom engagement therein, a locking pawl mounted in the casing and engageable with said releasable end of the shackle, tumbler mechanism arranged for normally maintaining said pawl in locking engagement with said end of the shackle, said mechanism including a series of disks each having a peripheral notch adapted to be adjusted in registration for receiving an inter-engaging element of said pawl and thereby permit moving the pawl out of locking engagement with said end of the shackle, means including a part adapted to be' engaged and actuated by the other end. of the shackle as the releasable end re-enters the casing for shifting said inter-engaging element of the pawl out of the notches of the tumblers and for shifting the pawl into locking engagement with the releasable end of the shackle, and means acting for disarranglng the tumbler disks.

GEDOR W. ALDEEN.

CERTIFICATE OF CORRECTION.

Petent No. 2,1L s,226. February 21, 1939.

GEDOR w. ALDEEN.

It is he'reby certified that erroI' appears in the, printed specification of the above numbered patent requiring correctionas follcws: Page L1,, second column, lines jand claim 5,- strike out the words "closing movement of and ineert the same after "by in line 1, same claim; and that the said Letters- Patent should be read with this correction therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 25th 1a of April, Am, 19 9.

Henry Van Arsclale (Seal) Acting Qommi'ssiener of Patents.