US120822A

US120822A - Improvement in permutation padlocks

Info

Publication number: US120822A
Authority: US
Publication date: 1871-11-14
Anticipated expiration: 1888-11-14

Description

SAMUEYLLOYD. Improvement in Permutation Pad Lock s.

No. 120,822 Patented Nov-14,1871.

1 AM. Pnoro-L/ruamAPI/m ca III/0561731153 moons,

PATENT OFFICE.

SAMUEL LOYD, OF NEW YORg, N. Y.

IMPROVEMENT IN PERMUTATION PADLOCKS.

Specification forming part of Letters Patent No. 120,822, dated November 14, 1871.

To all whom it may concern:

Beit known that I, SAMUEL LOYD, of the city, county, and State of New York, have invented certain Improvements in Permutation Padlocks, of which the following is a specification:

The object of my invention is to construct a simple and strong permutation padlock in which the combinations are set and the lock unfastened by turning the dial to certain known figures, and requires no key; and it consists in the flanged tumblers placed one within the other, the outer one of which has the graduations of the dial marked thereon, in combination with the adjustable curved spring for changing the combinations and the step-shaped notches of the hasp.

Figure 1 is a front view of a complete lock, showing the dial marked upon the outer revolving flanged tumbler, which also serves as a knob or handle. Fig. 2 is a sectional view of the lock on the line 00 w of Fig. 4. Fig. 3 shows a sectional view of the lock on the line 3 y of Fig. 4. Fig. 4 is a sectional view of the lock on the line 2 z of Fig. 3. Fig. 5 shows the peculiar form of the in ner flanged tumblers.

As shown in the accompanying drawing, the flanged tumblers A A are in the form of caps, one fitting within the other, the inner one turning upon a shaft, Gr, attached to the outer one, and are pressed together by a spiral spring, B. The projecting flanges a a of the tumblers A A fit into corresponding notches in the hasp C. These notches are made step-shaped, as shown in Fig. 4, thereby forming a strong catch, and require no space to be left between the flanges of the tumblers. The hasp is thus held by thev tumblers, and can only be withdrawn when the gateways D D of the tumblers are in proper position. A curved spring, E, is placed within the lock-case, and is held in position by its pressure upon the sides of the case, and can therefore be changed to diflerent positions for the purpose of changing the combinations of the lock. One end of this spring is bent inward so as to engage with a pin, F, upon the inner tumbler A, for the purpose of holding said tumbler while the outer tumbler A is revolved, until the gatings I) D are brought together; then, by reversing the movement, both tumblers move together until the gatings D D come opposite the notched end of the hasp 0, when the hasp can be withdrawn. The outer tumbler forms the face of the lock and has the graduations of the dial marked thereon. It is also provided with a center-shaft, G, which passes through the back plate of the lock, and serves as a rivet to fasten the lock together. If desired, the shaft G could be made of a separate piece and both of the tumblers made to turn thereon. Fig. 6 represents flanged tumblers of an equal size placed on both sides of a barbed hasp, showing the principle of flanged tumblers, but with features difl'ering from those claimed by the applicant.

I claim as my invention The flanged tumblers A A, fitted one within the other, the outer one of which having the dial marked thereon, in combination with the adjustable curved spring E and the step-shaped notches of the hasp G, substantially as and for the purpose set forth.

. SAMUEL LOYD.