US1856989A - Permutation lock - Google Patents

Description

' y ,1932. w. F. FOERSTER 1,356,989

PERMUTATION LOCK Filed May 14, 1931 Patented May 3, 1932 UNITED STATES PATENT WALTER FRED ronnsrnca, or EVANSVILLE, INDIANA, ASSIGNOB OFFICE,

or ONE-HALF 'ro FREDERICK WILLIAM BOERNER OF P O SEY COUNTY, INDIANA PERMUTATION, Loci:

Application filed May 14,

This invention relates to those permutation locks comprising a plurality of rotatable discs, combined with a sliding U -shaped hasp.

The object of the invention is to provide, first, improved false or decoy discs whose character is not determinable by the person using the lock; second, to provide an improved combination of hasp, permutation discs, and decoy discs; third, to generally improve the lock, rendering it more difiicult to manipulate by one not familiar with its combination; and, also, provide a lock which will be simple, inexpensive to manufacture, very strong and durable, and light in weight by reason of the fact that its parts may be stamped from sheet' metal and the hasp drop-forged.

In the accompanying drawings:

Figure 1 is a side elevation;

Fig. 2 is a vertical section, the pin and hasp being in full lines;

Figs. 3 and 4 are plan views of the top and bottom discs of the cage;

Figs. 5 and 6 are plan views of the upper locking disc and the upper decoy disc, respectively;

Figs. 7, 8, 9, 10 are edge views of the discs of Figs. 3, 4, 5, 6, respectively;

Figs. 11, 12, 13 are plan views of the central locking disc, the lower decoy disc, and the bottom locking disc, respectively;

Figs. 14, l5, 16 are edge views of the discs of Figs. ll, 12 and 13; and

Fig. 17 is a side elevation of the hasp.

The top disc of the barrel of the lock appears at l and the bottom disc is shown at 2, the two being connected by a pin 3 having reduced ends 4 which pass through holes 5 in the discs 1 and 2 and are headed or riveted down against said discs, as shown at 6. The discs 1, 2 and pin 3 constitute a rigid cage or body for the permutation discs 7,8, 9 and the false or decoy discs 10, 11, while the cylindrical pin 3 passes through the holes 12 in all of said discs, thus rotatably mounting all of the discs on the pin and permanently retaining them between the heads or discs 1 and 2.

The decoy discs 10, 11 have nearly complete arc- shaped slots 13, 14, respectively.

The permutation discs 7, 8, 9 have arc- The said ward 1931." swarm. 537,435.

shaped slots 15, v16 17 respectively andeach I ofthe permutatioirloclging discs 8, 9 has a notch,1l8,l9, respectively "for the reception of the, long leg of the hasp, which appears at 20. l The uppermost looking or permutation disc7 has two of the notches, '21 because it has to accommodate both :of the legs of the hasp or staple 20. I i v All of the discs are p-rovidedwith numbers or letters or other indicia, as usual inx locks of this general character, as shown at 22, and these discs are knurled to facilitate their manipulation.

The hasp or staple 20 is of U-shape, having a short leg provided with a notch 23 and a long leg provided with notches 24 defining the wards 25, 26, respectively. The ward- 26 is slightly larger than the hole 27 in the upper head or disc 1, although it is smaller than the slots 13, 14 and the notches 18, 19,21. 26 which is on the end of the longer leg of the hasp, is adapted to be received in a circular cavity 28 in the head 2.

The heads 1, 2 and the discs 7, 8, 9, 10, 11 may be cheaply and easily manufacturedas stampings. The pin 3 and the hasp 20 are forgings.

The invention is not limited to the use of any given number of locking and decoy discs.

What I claim is:

1. A permutation lock of the rotatable disc and sliding hasp type, comprising a cage composed of top and bottom discs, and a pin connecting said discs, a hasp which is slidable through the top disc, and a plurality of independent discs each of which is rotatably mounted on the said pin and located between the top and bottom discs, certain ones of said rotatable discs being locking discs adapted to lock or release the hasp, group of rotatable discs being of a false or decoy character, and, while being rotatable, having no locking action on the hasp.

2. A permutation lock comprising a cage composed of upper and lower discs, a pin having reduced ends and headeddown thereupon, the uppermost disc beingprovided with hasp-holes and the lowermost disc being providedwith a cavity,

a plurality of locking discs rotatably mount.

and one of said ed on the pin and located between the upper and lower fixed discs, said locking discs having arc-shaped slots provided with notches, a false or decoy disc rotatably mounted on the pin and located in the. group of locking discs, said false or decoy disc having an areshaped slot, and a hasp of general U=shape having a short leg provided with a notch and ward and a long leg provided with notches and wards and terminating in an en larged ward which is'adapted to be received in the cavity in the lower fixed disc when the hasp is locked and to prevent the long leg of the hasp from becoming detached from the up er disc, the legs of said hasp passing through the openings in wards on the hasp preventing the hasp from being pulled out except when the wards of ha notches, the slot in the said disc tobe'turned freely without interiering with the sliding action of the hasp. In testimony whereof I afiix my signature. WALTER FRED FOERSTER.

the upper disc, the 4' are in ali nment'with the aforesaid decoy disc ermitting

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