US312575A

US312575A - Door-latch

Info

Publication number: US312575A
Authority: US
Publication date: 1885-02-17
Anticipated expiration: 1902-02-17

Description

(No Model.)

T. J. MORGAN.

DOOR LATCH.

No. 312,575. I Patented Feb. 17, 1885..

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k i w A a r W Q W1 m assms Aftor-ney UNITED STATES PATENT OFFICE.

THOMAS JOHN MORGAN, OF HYDE PARK, ASSIGNOR OF ONE-HALF TO IVILLIAM MOOOMBIE, OF CHICAGO, ILLINOIS DOOR-LATCH.

EPECIFICATION forming part of Letters Patent No. 312,575, dated February 17, 1885.

Application filed July 14, um. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS J. MORGAN, a citizen of the United States, residing at Hyde Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Door-Latches, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to certain improvements in latches for doors and similar articles, and is designed to produce a latch that will operate, in closing the door, independent of the yoke or knobs; also one that will move the required distance with a much less motion of the knob; further, a latch wherein the returnimpulse is given to the yoke, and not to the latch-bolt. These several objects are accomplished in the latch illustrated in the annexed drawings, reference being made to them in the following description of construction and operation.

In Figure 1 is represented a plan view of the latch and operative mechanism, the coverplate being removed; and Fig. 2 a longitudinal section through the latch.

A designates the casing which incloses the mechanism of the latch.

On each side of the usual latch-slot in the casing is raised a standard, 13, between the outer ends of which is pivoted the latch G, which is recessed, as shown at D. In the said recess is pivoted one end of the bar E, which end has a decided upward curve, and as it straightens enters the yoke F through its divided end G, and is there provided with shoulders II, for enabling the said yoke to operate it. The bar has a further continuation,- I, which is adapted to pass through the perforated guiding-standard K. This continuation is surrounded by a light spring, L, between the standard and the shoulders. The yoke F .is provided on each side with a lug, M, to

which is secured one end of a spring of more or less strength, the other end being secured to a pin, N, formed in the casing. The yoke is provided on each side with a guide, 0, and is operated by a cam and knob of usual con- As the yoke is operated the latch struction.

will follow, and as the yoke is released it will assume its normal position by means of the side springs, while the latch will be actuated by the central spring. As a door containing the latch is shut the latch operates freely and easily without disturbing the yoke, thus preventing injury to the yoke and knob from the shock, especially whenthe door is slammed. Theconnecting-barbetweentheyokeandlatch, by being pivoted to the latter near its pivotal point, gives a sufficient throw to the latch, with a relatively very small movement of the knob. In the drawings this movement would be about as eight to three. In latches of common construction theknob travels farther than the latch. An ordinary sliding latch may be formed integral with the bolt and work independently of the yoke. The latch is operative without the yoke-springs.

The use of the curved bar pivoted to a swinging latch allows the employment of a casing of comparatively slight depth, obviating thereby the necessity of sinking the said easing into the body of a door, while the travel of the latch is suflicient for the purpose for which it is intended.

Having described the device, what I claim 1. In a door or. other lock, the combination, with the operating mechanism thereof, of a pivoted swinging latch, and a latch-bar having a curved end pivoted to the said latch near its pivotal point, for the purpose specified.

2. The combination, with the operating mechanism of a latch, of a yoke having the end opposite the knob divided, and a springretained latch-bar having a movement independent of the said yoke, and passing through the said divided end thereof, for the purpose specified.

3. The combination, with a pivoted latch and a yoke having adivided end, of the latchbar Tattached to the latch near its pivotal point, and within the yoke provided with retainingshoulders, and a springsurrounded continuation passing through and supported by a guiding-standard.

4. The combination of a pivoted latch, a In testimony whereof Iaffix my signature in 10 yoke having a dividedend and provided with presence of two witnesses. springs and guides on each side, a connecting latch-bar pivoted to the latch near its pivotal l THOMAS JOHN MORGAN. point, and havingashoulder and a spring-suicrounded continuation within the yoke, and Witnesses: supported and guided by a standard, and a JAMES T. ALLEN, casing inclosing the various parts and sup- \VILLIAM MOCOMBIE. porting and protecting them.