US490441A - Sliding-door lock - Google Patents

Description

L.`E.' JAGOBUS. -sLI DDDDDD of; LOOK.

y Patented Jan. v24, 1893.

ATENT LYMAN E. JACOBUS, OF ROMULUS, NEWYORK.

SLIDING-DOOR LOCK.

SPECIFICATION forming part of Letters Patent No. 490,441, dated January 24, 1893.

Application-tiled July 15 1892. Serial No. 440,140. (No model.)

To all whom it may concern.-

Be it known that I, LYMAN E. JACOBUS, of Romulus, in the county of Seneca, in the State of New York, have invented new and useful Improvements in Locks, of which the following, taken in connection with the accompanying drawings, is a full, clear, and eX- act description.

My invention relates to locks adapted to hold the meeting rails of sash, or the Stiles of doors, securely together.

My object is to produce alock for sash or doors which is simple and effective, and cannot be unlocked from the outside, as by the insertion of a knife blade or other tool between the rails, or stiles; and which operates to draw such rails or Stiles together; and which consists of two inter-locking and swinging cams suitably mounted, one upon each of the meeting rails or stiles.

My invention consists in the several novel features of construction and operation hereinafter described and which are specifically set forth in the claims hereunto annexed. It is constructed as follows, reference being had to the accompanying drawings in which- Figure l,is a front elevation of the lock showing the members mounted upon door stiles and unlocked. Fig. 2, isa like view of thesamelocked. Fig. 3,isa sectional elevation of the lever cani, and the catch to secure it.

A B represent the meeting Stiles of two doors, as sliding doors, or the meeting rails of two sash; or B may represent a door post or casing.

Upon A, I pivot the lever cam ctconcaved as at b, and provided `with a hook c. This cam is shown as mount-ed upon a plate, d, secured to the stile, or rail, and provided with notches n, with which the spring catch eis adapted to engage, to hold the lever in the desired position. This catch may play vertically through the lever and be provided with a button, as shown.

Upon B, I pivot the swinging cam h, shown as mounted upon a plate, k, secured as shown. Then when the Stiles or rails are brought together the lever cam is turned upon its pivot, so that its hooked end will engage with the point m, of the other cam, and thereafter both cams will swing together, the cam, h, rocking in the cam concavity of the lever, and gradually draws the Stiles or rails together, because the respective pivots are not in horizontal alignment until when the cam faces coincide, as shown, the locking is completed and the catch snaps into its seat and holds the lever in position. This catch is not absolutely necessary, as the lever will not ordinarily become shifted to unlock, but the catch adds an element of security.

What I claim as my invention and desire to secure by Letters Patent isz-- 1. A lock comprising a pivotal lever provided with a cam concavity in one edge, and a terminal hook at the end of said concavity projecting backward partly over it, in combination with a pivotal convex cam, adapted to iitinto the concavityof said levercam, and having a point adapted to engage with saidy hook when said lever is operated.

2.. A lock comprising a pivotal lever provided with a cam concavity in one edge, and a terminal hook atthe end of said concavity projecting backward partly over it, 'in combination with a pivotal convex cam, adapted to fit into the concavity of said lever cam, and having a point adapted to engage with said hook when saidlever is operated, and a spring catch in said lever adapted to secure said lever in its locked and unlocked positions.

In Witness whereof I have hereunto set my hand this 6th day of July, 1892.

LYMAN E. JACOBUS.

In presence of- HERBERT A. CARHART, HOWARD P. DENIsoN.

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