US 227587 A
Description (OCR text may contain errors)
G. H. SARGENT. Latch-Lever.
No. 227,587. Patented-May 11,1880;
c1 80 QIZZ N.PETERS:WPHOTO-LITNOGRAPHER, WASHlNGiON, D C.
UNITED STATES PATENT OFFICE.
GEORGE H. SARGENT, OF- NEW YORK, N. Y.
' SPECIFICATION formingpart of Letters Patent No. 227,587, dated May 11, 1880.
Application filed February 14, 1880.
To all whom it may concern Be it known that I, GEORGE H. SARGENT, of New York, in the county of New York and State of New York, have invented a new Improvement in Thumb-Levers for Door-Trimmin gs and I do hereby declare the following,
when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to be a full, clear, and exact description of the same, which said drawings constitute part of this specification, and represent, in
Figure l, a side view, and in Fig. 2, a transverse section.
This invention relates to an improvemeutin the levers used in door-trimmings, such as latches and bell-pulls, and particularly to that class which are made from what is commonly termed bronze metal. The friction on these levers, as in raising the latch or in turning the bell-hammer, is very great, and because of the soft ,nature of the metal it rapidly wears away, so as to offer a serious objection to this most desirable metal for such trimmings.
The object of this invention is to overcomethis difficulty; and it consists in combining with the soft metal. a hard-metal wearing-surface, in the manner hereinafter described.
As represented in the drawings, this invention is shown as applied to a thumb-latch in which Ais the thumb-lever, hung in the latchplate at a in the usual manner. The best form for the lever to adapt it to this improvement is a longitudinal enlargement, 1), upon the upper edge of the lever, which is formed in the process of casting. Over this enlargement a sleeve, B, of hard metal is placed, as seen in Fig. 2, covering the upper edge of the lever, and, turning inward below the enlargement,
thus securing said sleeve in place, so that this 40 entire working-arm of the lever, or the leveg may be cast with a groove in its upper edge and the hard-metal plate be introduced therein; but the shape must be such, substantially as described, that the hard metal shall be securely fixed to the softer metal. where the thumb-leveris used with a latch-bar on the opposite side of the door, and which is usually of the same soft metal as the latch-lever, the latch-bar may be protected by hard metal in like manner.
I am aware that it is not new to place a scalp or covering of one kind of metal upon another metal of different character for the purpose of durability, and do not therefore wish to be understood as broadly claiming 60 such a combination of metals.
I claim- Alever for door-trimmings of soft metal, constructed with an enlarged upper surface covered by a hard metal closed thereon, sub 6 stantially as described.
GEORGE H. SARGENT. Witnesses:
RUPERT SARGENT, LEICESTER SARGENT.
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