US2245091A - Combination lock - Google Patents

Description

June 10, 1941. A. LEWIT m. 2,245,091

COMBINATION LOCK Filed April 24, i 1939 2 Sheets-Sheet l June 10, 1941. LEWIT ETAL 2,245,091

COMBINATION LOCK Filed April 24, 1939 2 Sheets-Sheet 2 l|||llfllllllllllllllllll Patented June 10, 1941 COlVEBINATION LOCK Abraham Lewit and Pablo Wrba, Buenos Aires, Argentina Application April 24, 1939, Serial No. 269,604

2 Claims.

The present invention relates to a combination lock, and more particularly to a lock wherein the combination can be changed at will.

The object of the invention therefore resides in the provision of a combination lock simple in character, efficient in use, cheap of manufacture and the combination of which can be selectively changed by means of adjustments outside of said lock.

As an example, and for purposes of illustration, an embodiment of the invention is shown in the annexed drawings, wherein:

Figure 1 is a plan view of a top disc,

Figure la is an elevation of the above,

Figure 2 is a plan view of a free disc,

Figure 2a is an elevation of the above,

Figure 3 is a plan view of an actuating disc,

Figure 3a is an elevation of the above,

Figure 4 is a plan view of a fixed separator disc,

Figure 4a is an elevation of the above,

Figure 5 is a plan view of a base disc,

Figure 5a is an elevation of the above,

Figure 6 is a plan view of a translator disc,

Figure 6a is an elevation of the above,

Figure '7 is a plan view of a spring washer,

Figure 7a is an elevation of the above,

Figure 8 is a plan view of the partly-assembled lock showing the bolt,

Figure 9 is an elevation of the above,

Figure 10 is a plan view of stacked discs shown in Figs. 1, 2, 3, 5,

Figure 10a is an elevation of the above,

Figure 11 shows a bottom View of control disc,

Figure 12 is a side View of the above, assembled on operating shaft,

Figure 13 is a simplified side elevational view of the lock assembled, and

Figure 14 is a similar View showing the arrangement of the bolt actuating means.

Referring to the drawings, numerals l-3-5- 6-4 and 8 represent fiat discs of substantially the same diameter and. all of which have a circular central .aperture 2 for mounting on a hollow shaft.

The top disc I is provided with a depending tongue Ia and is notched marginally to form the radial steps lb and la.

The loose disc 3 is circular with the exception of notch 4 provided at the margin thereof.

The disc 5 is irregularly formed and comprises a portion 59 of larger radius defined by the steps 5d and 5]. A triangular tongue 5a is punched in the periphery of said portion 59 adjacent the step 5 The remaining portion of the periphery is out also to provid a wide notch limited by the radial steps 50 and 5b. Finally, a small notch 5c is formed between step 5d and the adjoining margin of smaller radius.

The above discs l--3--5 form together a set of movable members, one of such sets being'provided for each cipher of the lock combination.

Between each of the disc sets above mentioned, a fixed separator disc 6 is provided which includes a conical notch 14 and a pair of thin short projections Ba-Bd defining therebetween the space 6b.

The base disc 1 includes a tapered notch 24 similar to that of disc 6 and for the same purpose to be described later, An extension of larger radius la forms the steps 'lb-'|c, with bent lug 1d immediately adjacent the step 1c forming one of a group of three lugs Id equidistantly disposed around the periphery of the disc. A semi-circular depression 'le is provided near step 1b.

The translator disc 8 differs principally from the others in that an outwardly diverging finger But is formed on the margin thereof and angularly directed downwardly. A lug 8c is punched near the edge of the disc, adjacent the inner junction of the finger with the disc, said lug being bent sharply at right angles and extending downwardly from the body of the disc. A second finger 8b, shorter than the first, is also formed-in the outer portion of the disc but bent upwardly and concentrically with the periphery of the disc. This finger is cut short at its free end to provide a notch 8e having on the adjacent edge of the body an up-turned projection 8 and a pointed tooth 811. I

The lock is assembled in a casing l0 having parallel walls 10k: and Illg, in the'last of which an aperture I0 is provided for the bolt II. This bolt embodies an extension llb slotted at lid for a retaining screw l2 threadedly secured to the bottom of casing ID.

A tooth lie is provided on Hb for bolt driving purposes. 0n the bottom of casing Hi there is also mounted vertically a hollow shaft lfla having an upper notch lllb, as shown in Figure 8. As illustrated in Fig. 9, the shaft Illa serves to centre properly the various discs described previously. The casing bottom further includes the spacer posts Hlj, a bolt-pressing spring lllh pivoted at I01, 2. stop post llle for securing the fixed discs and limiting the rotary movement of the moving discs, and a roller lOd mounted on a fiat spring Ills for pressing against the disc l3. Finally, the bolt l l includes the upwardly projected lug Ila,

posite the extending member Ila. 'the'top disc I is inserted'with the lug Ia. disposed pivoted at Ma an arcuate arch I4 embodying the cross-pieces l4b-l4c and the tapered lug 14d. A flat spring l3e (Fig. 12) is used to project said arch I4 away from disc l3.

Assembly In the casing I9, having the sides [09 and 10k, the bolt II is assembled and the first disc to be placed therein is base disc 1 which is inserted over the shaft Illa, said disc having the lugs. 1d directed downwardly to form a space between T and I0.

Thereover, the actuating disc 5 is disposed with tooth ictupwardly with the step 5 adjacent the stop We, as shown in Figure 8. Thereover, the free disc 3 is disposed with the groove 4 corresponding to the similar groove 24 of disc 1 op- Thereafter,

in' groove 5e of disc 5 so as to turn therewith.

The fixed or separator disc B'is finally disposed over, the set of three discs above-mentioned withthe teeth Ba and 6b straddling the stop We so as to lock said separator in registration with its groove M in front of member Ila of the 'bolt H.

As disclosed before, a set of the three discs |-5-3 is used for each cipher of a combination, ,together with a fixed separator disc in order to insulate or separate the other sets'from each other. On top of the stack of sets of discs, the disc 8 is disposed with lug 8c and finger 8d V directed downwardly, so' as to engage 80 with step 5d of disc 5.

Then the shaft I31) is assembled, as shown in Figure 13, so as to engage one of the grooves l3a with theroller l lld, the arch l4 of disc l3 being disp osed such a manner that projection 14b engages the finger 8d of disc 8. In order to dispose the lid or cover 55 in position, the knob I30 is taken off the shaft I313, whereupon the cover is placedin position and the knob again secured to its shaft I31) by means of set screw I31.

When the lock is assembled as above indicated,

. the bolt can be retracted inside the casing, that v is, with the lug I la. inside the aligned notches 4,

l4 and 24,. of the superposed discs. To operate,

the disc I3 is turned by means of handle I30 which, when contacting the second groove 13a with 40d, must at this time align tooth 14b with groove 8e allowing the passage of said tooth until it contacts the sector 59 of the disc 5 the turning of disc 13 being continued until the desired cipher is reached. I

This operation is possible because at the time tooth 14b engages groove Be it falls over the-step 5] of disc 5 to move the tooth 5a thereof, whe'r= by the arch 14 with the corresponding tooth l4b shall engage tooth 5a and move same a section of the cycle until the desired groove l3a is reached which corresponds to the cipher chosen. When this actuating disc 5 is turned, the disc I is operated therewith and the free disc 3 disposed between the two is frictionally rotated also.

The movement of discs l3-5 is obtained by means of tooth 8c of disc 8, the movement of this disc being made only when the arch M has taken a position under disc 1 and the casing ID of the lock. When a complete turn of disc I3 is eifectuated, tooth 14b is positioned at the extremity of finger 8d, remains thereover and slides H upwardly until it reaches the shorter finger 8b to remain over the step 8f against the tooth 811 until a new cycle of the lock which has remained closed.

To open the lock, it is necessary to turn disc I3 until roller llld is in the desired groove l3a.

' and when returning to said groove the bolt will be free'for opening of the look. In these conditions, the tooth Mb engages the tooth lie of the arm' I lb of the bolt, whereby turning the handle I shall produce displacement of said bolt within the casing.

Upon releasing the handle I30, the spring lllh "will be effective to push upwardly the arm ill) to force the bolt ll through aperture If, the lock being operable as a single look by the turning of handle I30. 4 I

To close the lock, it will be suflicient to give the handle a few turns until disc 3, changing the position of aperture 4, prevents retraction of the bolt until -all members have been disposed as previously disclosed.

It is to be understood that the form of our invention herein shown and described is to be taken as a preferred example of the same, and that various changes as to the shape, size and arrangement of parts may be resorted to without departing from the spirit of our invention or the scope of the subjoined claims.

Having thus described our invention, we claim:

1. A combination lock of -the character described, comprising a. set of three movable discs for each cipher of a lock combination, a separator disc for each of said sets, a spring bolt, means on the middle disc for allowing passage of the bolt, means for releasing said bolt, an arcuate pivoted member for revolving the discs of each set according to the combination, and a translator disc for moving vertically the arcuate member'from' one set to another. 2. In a combination look, a series of disc sets,

. each of said set corresponding to a cipherof a combination, spacing means between said sets to prevent relative movement therebetween, a spring-pressed bolt, means on one disc of each set for preventing movement of the bolt, an operating knob for rotating a disc-turning arcuate 1 member, and a translator disc for consecutively displacing the arcuate member from one set to another.

ABRAHAM LEWIT. PABLO WRBA.

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