US366998A

US366998A - Field

Info

Publication number: US366998A
Authority: US
Publication date: 1887-07-19
Anticipated expiration: 1904-07-19

Description

(No Model.)

H. P. D. OROWNPIELD.

COMBINED LATCH AND LOCK.

No. 366,998. Patented July 19, 1887.

WITNESSES I IN VENTOR 2 BY QM Baum ATTORNEY.

N. PETERS. mmulh ra hu. Wafl'linglon. D. C.

UNrran stares ATENT reins.

HERMAN F. D. OROWNFIELD, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONEQHALF TO FRANCIS X. GANTER, OF SAME PLACE.

COMBINED LATCH AND LOCK.

$PECIPICATIO1Tfor-mizig part of Letters Patent No. 366,998, dated July 19, 1887.

Application filed May 31, 1887. Serial No. 239,798. (No model.)

To aZZ whom it may concern.-

Be it known that I, HERMAN F. D. CROWN- FIELD, acitizen f the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in a Combined Latch and Look, of which the following is a specification.

Myinvention relates to an improved latch and lock, and is illustrated in the drawings annexed, in which- Figure 1 is a view of the back of the latch, the back plate, h, thereof being removed to afford a better view ofthe mechanism. Figs. 2 and 3 are sections of the latch without the k nobs,taken on the lines 2 and 3, respectively, shown in Fig. 1. Fig. at is a front view ofthe. latch. Fig. 5 is aview of the bolt. Figs. 6 and 7 are views of the knobshaft.

The letter A designates the latch case, B the 23 bolt, and O the knob-shaft. The bolt 13 has a bifurcated or two-arm shank, b b, with an open central space, 0, between the arms ofthe bifurcation. Each arm has at its extremity a flange, d, and an incline, e, which is highest 2 5 near said flange and deepens as it proceeds toward the bolt end. The bolt has near its head a small socket, f, in its side. The case A is provided on its inner side with a central boss, 9, which has a scrcw-ho1e, g, for a screw, 9

0 which serves to conflnethe back plate, h, which latter rests on the boss gand shoulders as. The two arms I) Z) of the bolt-shank pass on either side of the boss g, while the latter is fixed in the central space, 0, between the said two arms.

A spiral'spring, i, also occupies the central space, and has-one end against the boss 9 and the other end against the bolt. This spring serves to press the bolt out or keep it shot,

as in Fig. l.

The knob-shaft G has around or cylindrical head, it, which occupies loosely a round bearing or hole, Z, in the lock-case, and a similar hole, Z, in theback plate,7z. The relative position of the two bearing holes Z Z is such that each of the two arms b b of thebolt-shank will pass on an opposite side of the knob-shaft head The knob-shaft head It has at its center two lugs, m, projecting in opposite directions, and each lug bears on adififerent one of the bolt shank arms b b These lugs m are to slide in the two bearing holes Z Z.

act on the flange (Z' at the extremity of the bolt-shank arms b b, and also on the inclines e of said arms. The knob-shaft 0 thus constructed is capable oftwo move1nents-the ordinary rocking movement (that is, a partial turning or rotary back and forward movement) and an endwise movement. This will be readily seen from the drawings, as the round head k of the shaft 0 may both turn and also Vhen the knob-shaft C, is partly turned either way, one of the lugs at will bind on one of the flanges (Z of the bolt-shank arms, and thereby withdraw the bolt B, and when said shaft is moved end wise, so that the two lugs m are brought to bear against the inclines e of the bolt-shank arms, the boltB will be withdrawn. It will therefore be seen that either one of the two movements of the knob'shaft Chas the effect of withdrawing the bolt, and that the boltspring 1' forces the bolt out. A spring, a, surrounds the round head k at one side of the lugs m, and bears against the case A, and tends to keep theknob-shaftO pressed endwise in such direction that the two lugs at will be movedaway from the inclines a. The lugs m are always in position to act on either the flanges (Z or the inclines e. A small stop-bo1t, f, has position on the inside of the case A, and is adapted to take into the socket f in the side of the bolt when said bolt is shot or forced out. This stop-boltf serves to keep the bolt B from moving back, and may be employed whenever it is desired to have the said bolt B serve as a lock. The stop-boltf is actuated by aknob, 0, on the outside of the case,and a shank, 0, passes through a slot in the case and connects the knob with the stop-bolt. A small spring, 1), (see Fig. 3,) is suitably arranged between the stop-bolt and case, and serves to prevent the stop-bolt from slipping.

The extremity of the bolt B has the usual beveledside,q,and the opposite side,r, is slighly rounded as it approaches the end. This rounded side will bear against the ordinary catch, which is fixed to the door-frame and fa cilitates the entrance of the bolt end into the catch. This is found desirable when closing the door by pulling the knob-shaft. A latch thus constructed mayhave its bolt drawn back into the case by partly turning the knob-shaft or by pushing or pulling said knob shaft. With this look a person whose hands happen to be full of pack ages or bundles,and therefore is unable to turn the knob, may, nevertheless, be able to push or pull the knob, and thus open the door.

Having described my invention, I claim and desire to secureby Letters Patent of the United States- 1. An improved combined latch and lock, consisting of the boltB, having bifurcated portion I) b, inclines e e, flanges d d, rounded portion r, and socketf, the spring '6, the casing A, with boss 9, the knob-shaft O, With head It,

having lugs m m, the spring 10, surrounding said'head, and the stop-boltf, having spring 10 and knob 0, said bolt f adapted to engage the socket of the bolt B, as shown and described, and forthe purpose set forth.

2. In a combinedlatch and lock, the bolt B, having a socket, f, in its side, in combination with the spring stop-bo1t having knob 0, the

the said stop-bolt adapted to enter said socket