US43078A - Improvement in locks - Google Patents

Description

UNITED STATES PATENT JAMES W. MILLER, OF WAYNESBOROUGH, ASSIGNOR TO HIMSELF AND JOSEPH SNIVELY, JR., OF GREENOASTLE, PENNSYLVANIA.

IMPROVEMENT IN LOCKS.

Specification forming partot' Letters Patent No. 4 3,078, dated June T, 1864.

.To aZZ whom it may concern:

Be it known that l, JAMES W. MILLER, of wlaynesborough, in the county of Franklin and State of Pennsylvania, have invented a certain new and useful Improvement on Locks; and I do hereby declare the following to be a full, clear, and exact description thereof, ret'- erence being had to the accompanying drawings, and to the letteis and marks thereon.

My improvement is more particularly intended to be used on barn and stable doors, but, like most locks, can be used elsewhere.

By the drawings forming a part of this specification my lock is shown so constructed as to be attached to a frame, which can be at'- fixed to'the door orto the. door-frame, but as is evident the look may be attached directly to the door or door-frame.

Figure l of these drawings shows the lock a, attached to a frame, b, and also shows a bolt or slotted bar, c, which is connected to the door, the bolt of the lock passing through a slot in the end of the bar c. Fig. 2 is a view of the lock detached and showing its interior structure; Fig. 3, a view by transverse section 3' Fige, aview of the key-hole protector Fig. 5, a view ot' the key, and Fig. 6 a view of the slotted bar o detached.

In each of these gures, where like parts are shown, like letters and marks are used to indiy cate the parts.

yA flat spring, l1., serves by friction to hold the bolt d when unlocked, and to act as a tumbler or guard plate to the bolt when locked, as its end rests directly against the bolt, as is shown by black lines in Fig. 3. There are two keyholes, i andj. Through the one the bolt is locked by simply forcing it down with the key k, and through the other the bolt is unlocked by screwing the key into the bolt, the bit l of l the key forcing back the spring It at each turn of the key and holding it back when screwed home, so that the bolt is easily unlocked. The key screwed in the bolt and the bolt in the slot or hole of the bar c are shown by black lines in Fig. 2. In unlocking a little pressure of the key .toward the spring will aid the bit l in keeping the springback from the bolt.l The key-hole j is protected by a plate, m. This plate has on its inner surface a projecting piece, a, which acts as a catch` by simply turning the plate half-way round after the piece a is placed' in the key-hole. When this plate is attached to the one keyhole, thc lock being locked and the key withdrawn, the plate appears merely as a key-hole cover, and any .person attempting to pick the lock would be deceived by this plate and would, without fully knowing the structure of the lock and having a proper key, be un able to unlock the lock.

What I claim as my invention, and desire by Letters Patent, is

1. The combination of the bolt d and spring h with the key k, when constructed and operated as recited herein.

2. The plate m, in combination with the lock y and key, substantially as and for the purposes herein set forth.

This specification signed this 11th day of April, 1864.

VJAMES W. MILLER.

Witnesses:

J oHN KAUFEMAN, J'. A. Hans.

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