US460016A - Peter d - Google Patents

Description

(No Model.)

P. D. &IA. JOHNSON.

LATCH.

No. 460,016. Patented sept. 22, 1891.

UNITED STATES PATENT OFFICE.

PETER D. JOHNSON AND ARTHUR JOHNSON, OF NVOLCOT", INDIANA; SAID Y PETER D. JOHNSON ASSIGNOR TO AMOS JOHNSON, OF SAME PLAGE.

SPECIFICATION forming part of Letters Patent No. 460,016, dated September 22, 1891.

Application iiled February 6,1891. Serial No. 380,490. (No model.)

The object of our invention is to provide av combined lock and latch which will be simple in construction, cheaply manufactured, and readily applied. This object we attai'n by the construction illustrated in the accompanying drawings, wherein like letters of ref- 2o erenee represent corresponding parts in the several views, and in which- Figure l represents a side elevation with the sides of the Casin gs removed, the latch being extended and the bolt drawn back. Fig.

2 is a similar View with the parts adjusted in an opposite manner. Fig. 3 is a detail perspective view of thelatch. Fig. e is a detail `perspective view of the knob, sleeve, and end ot' pitman; and Fig. 5 is a rear elevation of 3o the casing.

In the drawings, A represents the attaching-plate, having apertures therein at both' ends and center.

l5 and Bl represent cylindrical casings secured to the plate, respectively, at points between the center and ends thereof. These casings are made of two parts divided centrally and united by suitable screws. In the upper casing is placed the latch C, which pro- 4o jects through an opening` in the plate and works longitudinallyin the casing. It is con structed with a recess c in its central portion and two rearwardlyextending arms c', the upper faces oi' which are below the plane of the edges of the latch proper, thereby forming shoulders c2. These arms are beveled or inclined. oppositely on their inner faces, cliverging at their outer ends to narrow points. They are formed of spring metal, sothat they 5o may be forced apart. They are separated from each other by a transverse groove c3, whereby the same may be sprung up or forced i apart. In adjacent walls of the groove o3 are formed notches, (not shown.) in which the end of a pitrnan D rests. The pitmar; D is constructed with a semicircular bearing don its outer end, which works in the aperture c of the latch. The pitman is placed in the groove between the arms by springing the latter apart and insertingthe same while they 6o are in this position. The size of the pitman is such as to permit the same to move in the groove, it desired. The opposite end of the pitman D is curved at right angles and fitted in au apertured socket extension extending` laterally from the sleeve E ot-the knob, so that by turning the knob from the position shown in Fig. l to thatv shown in Fig.. 2 the pitlnan is carried up and back, thereby drawing the latch with it. 7o

To normally hold the latch out we place around the arms c a spiral spring F, one end y of which abuts against the shoulders c2, while the other end abuts againsta circular stop F', rigidly secured to the casing, near the center thereof. It will therefore be seen that aperfect longitudinal movement of the latch is obtained by the movement ot the knob, the inclined sides of the arms, togetherwith the semicircular bearing of the pitman, permit- 8o ting the pitman to wvork up and down in the space between the arms without throwin the latch out of alignment. It will also be noticed that the circular stop F', between which the arms work, acts as a guide, in conjunction 8 5 with the plate, for the latch.

The construction of the lock in the casing B we do not deem it herein necessary to describe other than to state that the respective tumblers b are pivoted in the casing and the 9o bolt b arranged to operate between the tumblers, which'are located on opposite sides of the casing.

In unitingr the two casings to the plate A we are enabled to secure the two in the cavity formed in the door by three screws, the center screw acting to hold bothfcasings in place, while the upper screws act, respectively, as assistants to the center screw, and also by uniting the two casings the lock and roo latch are less liable to become disarranged in their seats or out of align ment with the locking-openings in the edges of the door-frame- We are aware that many minor changes can be made in the arrangement and construction of our invention and substituted for those herein shown and described without in' the least departing from the nature and principle of our invention.

Having thus described our invention,`what We claim as new, and desire to secure by Letters Patent, is*

In a door-latch, the combination, with a cylindrical casing, of a longitudinally-movable latch therein, having a recess near the center thereof, two rearwardlyextending spring-arms c integral with the latch, having oppositely inclined inner faces, shoulders formed by the latch at the ends of the arms, f

a transverse groove c3 in the portion of the latch between the arms, notches in the walls of the groove, a pitman passing through the groove and resting in the notches, having an enlarged head resting in the recess for engaging the grooved portion of the latch, a sleeve having an extension in which the opposite end of the pitman is secured, a circular stop F on the casing, and a spring surround- ,ing the arms, its ends abutting against the shoulders and stop, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

PETER D. JOHNSON. 4 ARTHUR JOHNSON. Witnesses:

O. E. ROGERS, JESSE GATES.

Images