US103837A

US103837A - Improvement in door-keys

Info

Publication number: US103837A
Authority: US
Publication date: 1870-06-07
Anticipated expiration: 1887-06-07

Description

` waited 5eme peut can,

JAMES BRADY; OE BRANFORD, CONNECTICUT, ASSIGNORTO THE BRAN- EORD LOCK WORKS, OE SAME PLACE.

Lettere Patent No. 103,837, dated June 7, 1870.

IMPROVEMENT IN DOOR-KEYS.

The Schedule referred to in these Letters Patent and making part of the same.

Tol all whom it may concern `Be it known that I, JAMES BRADY, of Branford, in the county of New Haven and State of Connecticut, have invented a new Improvement in Door- Keys and I do' hereby declare the following, when taken in connection with the accompanying drawings andthe letters .of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent in Figure 1, a perspective view;

Figures 2 and 3, a perspective view of' the two parts detached; and in A Figure 4, an end view of the key.

This invention relates to an improvement in common door-keys, the object being to construct the key, in a simple and cheap manner, from sheet metal, so that the spindle of the key .will he able to form a bearing within the key-hole of the lock, upon which to turn the key.

Heretofore this class of keys has been formed from cast metal, with round spindles, which necessitates no inconsiderable expense in tting up the keys, or, if folmed from sheet metal, a semi-cylindrical piece has been brazed upon each side of the spindle to make it round, and this construction makes a still more expensive key than a key of east metal.

By `my invention the expense of manufacture is greatly reduced, and consists in v-a dat sheet-metal key, constructed with a transverse slot in its bit end, and combined with a transverse forked piece, of similar sheet metal, fitting into the fork, making the bit end of the spindle in the transverse section the form of a so that, when the two parts are secured together, the extremes of the -lwill form a bearing each being centrally located in the other, as seen iu fig. 1, so that the section of the'spindle will be as seen in g. 4, so as to form a bearing for the turning of' the key. The two parts, when thus fitted together, are

brazed or secured together by any known process.

With the known facilities for striking blanks from sheet metal, it will be evident to those skilled in the art that the cost of this key is very little more than the metal itself, while, for all practical purposes, the bearing in the lock is equally as good as if the spindle at that point was a complete-cylinder.

I claim as my inventiong As a new article of manufacture,'a sheet-metal key, both the key and the piece A slotted to set oneinto the other, making the transverse section of the bit end of the spindle of shape, constructed with a transverse piece, A, tted'centrally onto the spindle of the key, as and for the purpose specied.

J AMES BRADY. Witnesses:

JOHN H. SHUMWAY, A. 'J TIBBITs.