US51954A - Improved door-latch - Google Patents

Description

UNITED STATES PATENT OFFICE.

EMMONS MANLEY, OFI-MARION, NEW YORK.

IMPROVED DOOR-LATCH.

Specification forming part of Letters Patent No. 51,954, dated January 9, 1866.

To all whom it may concern.:

Be it known that I, EMMoNs MANLEY, of Marion, in the county of Wayne and State of New York, have invented a new and Improved Door-Latch and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters ot' reference marked thereon.

My invention consists in the use ot' a slotted latch, a crescent-shapedtumbler, a semicircular double cam, and shouldered cross-bar or handle-shaft combined, a combined sheath and face-plate, (the shea-th containing a spiral spring,) all`so arranged as to be easily applied to any door with no further mortise than a trimmed auger-hole of small size, the latch being at the same time very strong and durable.

Figure 1 represents the latch in working order; a, the slotted latch; B, the sheath for spring, which sheath is combined with the face-plate C, held firmly by being folded under the edges of the face-plate, folded backward and meeting at a line through the center of plate, edges of plate being cut to fit the sides of the sheath. H D F represent the doublecammed shouldered cross-bar or handle-shaft combined. E represents the crescent-shaped tumbler, pivoted and combined with a stop on opposite side, passing through the slot of latch A.

Fig. 2 represents the spring-sheath, detached. b represents the lip, which is folded under the edges of the faceplate when bent backward in position. d represents the opposite end of sheath, so contracted as to hold the spring in place while Working.

Fig. 3 represents a section of latch, showing the spiral spring; S, the spring; G, the catch end ofthe latch A, as shown in Fig. l.

Fig. 4 represents the pivoted tumbler combined with the stop; a, the pivot; fm, the stop.

The action of this latch is as follows: The cross bar or handle-shaft being turned in either direction throws one of the projections of the double cam against oneof the limbs of the crescent shaped tumbler and draws the latch, which slides on the handle-shaft, passing through the slot in the latch. The tumbler E- is prevented from turning too far by the stop m. rlhe latch is again thrown into position by the spring S.

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

The slotted latch A, with the pivoted tumbler E, cam D, and stop m, constructed and arranged as set forth.

f EMMONS MANLEY.

Witnesses:

C. G. HUGGINs, L. W. WrLooX.

Images