US1416790A - Secret-combination lock - Google Patents

Description

1. cmoLA Am) D. PoU'DoRo.

SECRET COMBINATION Lock. `APPLIGATJON FILED NOV. 1, 192|.

1,416,790l r Patented May23,1922.

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JOSEPH. CIOTOLA ANDy DQLVIINCK QOLBOO, OF PELDELPHL SEUR/ET-CMBLNATION LOCK.

riflesse.

Specification of Letters Fstent.

lfatented lilay ,933, i922 Application filed November 7, 1921. Serial No. 51E/3x33.

To .aZZ 107mm t may concern.'

Be it known that we, J osnrn CIoToLA and Dominici; PoLiDono, a citizen of the United States, and a subject ot the King of Italy, respectively, both residing at S05 Sears Street, Philadelphia, in the county of lthiladelphia and State oi Pennsylvania, have invented certain new and useful Improve-- ments in Secret-Combination Locks, ot which the following,l is a specilication, reference being had therein to the accompanying' drawings.

This invention relates to a secret combination lock. It is intended primarily for use in connection with a theft preventing,` automobile wheel lock, such as that illustrated in our (1o-pending application, Serial Number lgtll tiled on the Tth day ot Novem-A ber, 192i. However, as this description proceeds it will be seen that the loek is capable ot general application and is useful in any relation in which a combination padlock may be employed.

ln the accompanying drawing:

Fig. l is a iront elevation oit a lock eon structed in accordance with the invention and with tl e tront ot the casingremoved; and

Fig. 2 is a verticalv sectional view through said lock.

liike iuinlerals designate eorrespomlinp; parts in both of the figures oit the drawing.

ln the particular lock which we have chosen to illustrate as descriptive ot the invention, the rear wall 5 and side walls 6 are made ot a single stamping. i fillingY block T constitutes the top wall of the lock casing and the shackle 8 moves through said fillingblock. The tree legv 8il of the shackle is notchedfas indicated at 9, to be engaged by a latch l which is mounted lor sliding movement in keepers il, said keepers projectinn' from a bracket l2 secured to the rear wall i spring 13 bears between the rear end ot the latch l0 and a stop 14 carried by the rear wall et the lock and tends to move the latch l0 into engagement with the leg 81 ot the shackle. si push rod l5 is engaged with the latch l() and its extremity l projects through the side wall ot the lock casing'. The structure just described duplicated at the lower part of the lock where a latch l@ is mounted for movement toward the right to engage a notchL 1T formed in the leg` 8b ot the shackle. he latch 16 moves through keepers i9. push rod is connected to the latch 16 and its end 2l is eX- posed outside ot the right-hand wall of the lock easing'. illspring 22 bears between the lett-hand end ot the latch 1G and a stop 23 c rried by the rear wall 5 of the lock easing. pringral enen-cles the leg 8b oit the shackle and bears against a collar carried by said leg, said spring normally tending) to move the shackle to open position. lt is inanifest that it by pressing` upon the exposed ends l5 and 2l of the push rods l5 and 20 the latches l0 and 1G are moved inwardly the shackle will be released and the spring 2li will act to throw it to open position. However, it is not possible to thus move these latches inwardly until bolts 26 and 2T which project into said latches, are withdrawn. rlhes-e bolts are connected to the opposite ends oit a rocking lever 28, the latter beingpivoted at Q9 intermediate said bolt. A plunger 30 is pivotally connected at 3l to the lever Q8 and the lower end ot his plunger bears upon. a lealz spring` 32. in anti-friction roller is disposed between said leat spring and the bottom wall Sil: ot the lock casing. The :tront wall oil? the casing is secured in place by rivets or like fastening devices, indicated at 36 which pass through the filling; block 'T and through a second rigid filling; block 37 to the under side ol which the leaf spring;- 32 is secured at 38. rlhus the bottom wall lies snugly in place between the side walls (i, the rear wall 5 and the t'ront wall but this bottom wall Sel is secured only at its right-hand end. lts right-hand end is upturned, as indicated at 39 and is secured in place by a rivet l() which passes through the adjacent side wall 6. Thus the lett-hand end ot the bottom wall 34: is free to move but since the lower tace ot the bottom wall 3ft lies just flush with the lower edges et the iront, rear and side walls, no one would imagine from the mere inspection or the lock that this lower wall is capable ot movement. But as a matter olf tac-t the lett-hand end ot the lower wall being` i'ree andV the lower wall as a whole being made ot resilient material, the operator may. by pleasing; upwardly upon the lett-hand end oi lthe bottom wall Bil. force the plunger 30 upwardly and rock the lever 28 upon its pivot to withdraw the bolts Q6 and 2i" from their engagement with the latches l0 and 1G. lWhen this is done pressure upon the push rods l5 and 2d will result in moving these latches to release the shackle and to permit said shackle to move to open position. When the pressure upon the bottom wall 34 is released, the leaf spring 32 causes said wall to resume its former position and lie eXactly flush with the lower edges of the remaining walls of the casing. At this time the casing appears to be an ordinary padlock casing and gives no evidence that a part thereof is movable to effect an initial release of the combination latches located inside of said casing.

So far as we are aware, we are the first to provide a lock wherein a part of the outside casing is movable to elfect' an initial unlocking of the remaining elements of the lock.

It is manifest that this idea could be carried out in many ways. While in the particular embodiment of the invention shown it is the bottom wall of the case that is movable, it is manifest that it would be well within the skill of a mechanic to make some other part of the case movable to effect the same result.

It is, therefore, to be understood that the invention is not limited to having the bottom wall the movable element of the lock casing.

The invention further contemplates the provision of certain dummy elements inanipulation of which accomplishes nothing but the presence of which confuses a dishonest person who attempts to operate the lock. To this end we have mounted upon the front wall 35 a rotative button 4:1 which has no connection with any of the elements of the lock but its presence leads a would-be thief to conclude that the release of the lock is effected by manipulation of the button and he thus wastes time and confuses himself in manipulating said button. At 42 we have indicated a dummy push rod which slides through a stud 43 carried by the rear wall 5 and is forced outwardly by spring la which bears between said stud and a collar 45 on the push rod. This push rod manipulates nothing but its presence confuses the thief. In order to operate the lock the per son operating the same must know just which push rod to press upon at the time that the bottom wall 34 is forced upwardly to release the latches and the presence of these dummy push rods renders it possible to eifect a large number of combinations.

Having described our invention what we claim is:

l. A lock of the character described comprising a locking element, a latch for holding the same in closed position, a detent for said latch and a movable casing section connected to said detent and operating the same to release the latch upon movement of said .casing section.

2, A lock of the character described comprising a locking element, a plurality of latches for holding said locking element in closed position, detents engaging said latches and preventing their movement until withdrawn from engagement therewith and a movable casing section accessible from the exterior of the lock and connected to one of said detents to simultaneously operate them upon movement of the casing section to cause their withdrawal from engagement with the latches.

3. A. device of the character described comprising a casing7 a shackle mounted for movement therein, a latch engaging said shackle and holding the same in locked position, a detent, a bodily movable wall constituting a part of the casing and connections between the wall and the detent operable upon movement of said wall with respect to the remainder of the casing to withdraw said detent from engagement with the latch to permit the operation of said latch and means accessible from the exterior of the casing for operating said latch.

1i. A device of the character described comprising a casing having a movable wall section, a shackle movable in said casing, spring means tending to move said shackle to open position, a plurality of latches engaging said shackle and holding` it in locked position, push rods for said latches having portions exposed outside of said casing, bolts engaging said latches and connections between said bolts and the movable wall section acting to withdraw said bolts from their engagement with the latches upon movement of said wall section with relation to the remainder of the casing.

5. device of the character described comprising` an enclosing casing-having one of its walls movable with respect to the remainder of the casing, a shackle mounted for movement in said casing, a spring tending to throw said shackle to open position, a `pair of latches for engaging said `shackle for holding the same in locked position, push rods for said latches exposed at the outside of the casing, spring means tending to move said latches into engagement with the shackle and to project the push rods outward y, a lever pivoted intermediate its end7 bolts pivotally connected to said lever upon the opposite sides of its pivot. said bolts engaging said latches to prevent the movement of said latches until said bolts are withdrawn and a connection between said lever and the movable wall through which said lever is rocked upon its pivot upon movement of said wall with respect to the remainder of the casing to withdraw said bolts.

ln testimony whereof we hereunto affix our signatures. i

JOSEPH CGTOLA. DOMINCK POLDRG.

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