US145370A - Improvement in locks - Google Patents

Description

H. stun.

Locks 1 No. 145,370. Patented Dec-9,1873.

Witnesses. Inven r Per Attorneys.

AM PHOIU-llT/IOGRAPH/L' Ca/MX/asM/MA'S PROCKSS) UNITED STATES PATENT QFFIGE.

HERRMANN STEIN, OF NEW YORK, ASSIGNOR TO HIMSELF AND HERMAN DALE, OF BROOKLYN, N. Y.

IMPROVEMENT IN LOCKS.

Specification forming part of Letters Patent N0. 145,370, daled Dccr mber 9, 1873; application filed September 13, 1873.

To all whom it may concern:

Be it known that I, HERRMANN STEIN, of the city, county, and State of New York, have invented a new and Improved Look, of which the following is a specification:

In the accompanying drawing, Figure 1 represents a sectional side elevation of my improved lock; Fig. 2, a top view of the same; Fig. 3, a detail view of the spring-plate for holding the tumbler in place, and Fig. 4 the end view of the key of the lock.

Similar letters of reference indicate corresponding parts.

The object of my invention is to furnish a simple and eflective lock for use in the different trades, which can cheaply be made, being durable and strong in construction, and not liable to open when tampered with. My -invention consists in a revolving tumbler which acts directly on a recessed bolt, and is retained in opened or closed position by a disk-shaped spring-plate with projecting teats.

In the drawing, A represents the bolt of the lock, which is guided in its forward and return motion, in the usual manner, by a slot in the side face-plate and a lug, a, and slot a at the rear end. The tumbler B turns in a recess, 11,

of bolt A, which recess is provided with curved sides and a straight connecting part, as indicated in Fig. 1. The tumbler B passes along one side and acts on the other side of recess 1), for producing rectilinear motion of bolt A. Tumbler B is centered with its circular part on a vertical pillar, d, which is firmly set into the main plate of the lock. The hollow key 0 is provided with a lug, e, and fits into a circular recess, 0 of tumbler B, when placed on pillar d, which recess has diametrical extensions 0 of the size of lug e, by which the latter takes hold of the tumbler to turn the same. A diskshaped plate, D, rests on supports f and tumbler B, and is provided with a perforation and short slotted extensions, corresponding exactly to recesses e e of the tumbler B and pillar d, for admitting the insertion of the key 0 there to. Teats or projections g are arranged at the under side of plate D, at points which define the limits of forward and backward motion of bolt A, for retaining the tumbler B securely in position till carried past one teat, g, by the action of key 0 on the same. The tumbler B is then turned'and produces the motion of bolt A till the other teat, g; is reached. The pressure of tumbler B on teat g lifts that part of plate D which, on the passage of the tumbler, locks like a strong spring-plate on the same and secures its position. The small slots or recesses for the key prevent the introduction of wires of sufiicient strength to overcome the strong pressure of plate D on the tumbler, so that the lock cannot easily be tampered with, while the direct action of the tumbler 011 the bolt prevents the forcing back of the same by HERRMANN STEIN.

Witnesses PAUL GOEPEL, HERMAN DALE.

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