US1695080A - Permutation lock - Google Patents

Description

Dc.1'1,1928'. I I 1,695,080

H. A. BARRETT PERMUTATION LOCK Original Filed May 13, 1925 FIG. 2.

7 F123" lr Patented Dec. 11, 1928 UNITED STAT-Esp.

HARRY A. BARRETT, or" rHILAnELrnIA, 1 ENNSYLVANIA;ASSIGNOR 'ro BARRETT P AT ENT' FFl CE.

LOCK COMPANY, INC., A CORPORATION OF DELAWARE.

'PERMUTATION LOCK.

Applicationfiled May 13, 1925, Serial No- 29,886. 'Renewed May 19, 1928.

This invention, generally stated, relates to permutation locks and has more especialrethe results sought by the leading object;

Other and further objects not at this time appearing will be hereinafter more specifically referred to.

The inventionv consists of the novel construction hereinafter described and finally claimed.

The nature, characteristic features and scope of the invention will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof, and in which:

Fig. 1, is a view in elevation of the lock.

Fig. 2, is a view similar to Fig. 1 with the front plate and its dial removed.

Fig. 3, is a view in section taken upon the line 33 of Fig. 2.

Fig. 4, is a' detached View of one of the guides shown in Figs. 2 and 3.

Fig. 5, is a face view of one of the tumbler rings.

Fig. 6, is an elevational view of the rotatable post shown in Figs. 2 and 3.

Fig. 7, is an edge view thereof.

Fig. 8 represents a slotted. disc hereinafter referred to; and

Fig. 9, is a view of the base part detached.

For the purpose of illustrating my invention I have shown in the accompanying draws ings one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of the instrumentalities as herein shown and described.

-R-eferring to the drawings, the reference numeral 10 designates a dished casing having vided with a knob or handle 17. Surrounding saidpost16 are a series of tumbler rings 18 each provided internally with a. projection 19 and externally with a notch 20. These rings are supported and guided in a. circular path through fixed guides 21, radially arranged with the opposed faces thereof grooved as at 22. Thus in operation as the post 16 is rotated by handle 17 the edge of said post engages'with the inner projection 19 of a tumbler ring for moving same to a desired position. During this movement the butt 23 of a dog 24, pivoted as at 25, rides upon the peripheries of the tumbler rings the opposite end of the dog cooperates with the notched part 26 of a shackle 27 as best seen in Fig. 2. When the total number of tumbler rings 19, of which threeare shown in the drawings for illustrative purposes, have been properly moved so that their notches are in alignment it is evident that the butt 23 of dog 24 willuncler the influence of gravity drop into the aligned notches and thus permit the withdrawal of the notched end of the shackle from engagement with said dog. The shackle in open position, because of its cam-like end "28 abutting against the butt of the dog 24, maintains the knob, post and tumbler rings against rotation since the dog is thus held firmly in the notches ofsaid rings. It is thus apparent that with few and simple parts an efficient lock is provided, which after assembly possessesno delicate parts to become deran ed and no springs to weaken and get out of or er. Further, because of the simple arrangement of tumbler rings and their grooved guides dislocation of said rings is practically eliminated which is most desirable in combination looks. a e I It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisoperative through said rings and fixed to said knob, for engaging with said projections, a shackle, and a pivotal dog one end of which is adapted to ride upon the peripheries of said rings and the opposite end of which is for engaging said shackle.

2. In a lock of the character stated a casing having fixed therein radially disposed guides having opposed grooved faces, a plurality of tumbler rings rotatably fitted to said grooves, each ring having an inner projection and an outer notch, a knob, a flat rotatable post operative through said rings and fixed to said knob, for engaging with said projections, a shackle, and a pivotal dog one end of which is adapted to ride upon the peripheries of said rings and the opposite end of which is for engaging said shackle.

3. In a lock of the character stated a casing having fixed therein radially disposed guides havingopposed grooved faces, a plurality of tumbler rings rotatably fitted to said grooves, each ring having an inner projection and an outer notch, a knob, a rotatable post operative through said rings and fixed to said knob, for engaging with said projections, a pivotal dog, a shackle having a pivotal cam-like end for contacting with the butt end of said dog, one end of which dog is adapted to ride upon the peripheries of said rings and the opposite end of which is for engaging said shackle.

In testimony signed my name.

HARRY A. BARRETT.

whereof, I have hereunto'

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