US371577A - Assigjtoe of one half to - Google Patents

Description

(No Model.)

B. HAMBUJER.

COMBINED LATCH AND LOOK. No. 371,577. Patented Oct. 18, 1887.

UNITED STATES PATENT Orricn.

EPHRAIM HAMBUJER', OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO S. WIGHTMAN STEVVARI, OF SAME PLACE.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 371,577, dated October 18, 1887.

(No model.)

To all 107mm it may concern:

Be it known that I, EPHRAIM HALWIBUJER, a citizen of the United States, residing at Detroit, in the county of \Vayne and State of Michigan, have invented certain new and use ful Improvements in a Combined Latch and Look, of which the following is aspecification, reference being bad therein to the accompanying drawings.

[0 This invention relates to new and useful improvements in a combined latch and lock; and the invention consists in the novel construction and arrangement of different parts, all as more fully hereinafter described.

In the drawings which accompany the specification, Figure 1 is an elevation of the lock with the cover of the lock-case removed.

Fig. 2 is a cross-section on line a: x in Fig. 1.

Fig. 3 is a face view of the lock. Fig. 4 is a cross-section on line y g in Fig. 1.

A is the lock-case.

B is the faceplate secured to the lock-case.

O is the latch-bolt.

D is the spring projecting the latch-butt.

E is a fulcrum-stud for the tension-coil of the spring D.

F is the knob-spindle.

G is the hub of the knobspindlc.

H is the actuating-arm on the knob-spindle.

I is the key-hole.

J is the tumbler, pivotally secured at or about midway of its length below the latchbolt on a fulcrum-pin, K, so as to swing in a plane parallel with the plane of the bolt. One end of this tumbler projects in proximity to the key-hole to be operated on by the key, and the opposite end projects in proximity to the faceplate. Near its forward end this tumbler is provided with a shoulder or stud, M, which in the operation of the lock is adapted to engage with a notch, N, formed on the lower edge of the latch-bolt, and the arm 0 of the latch-spring is adapted to hold the tumbler in such engagement by its pressure upon the pin 1?.

L is a pin rotatively secured in the faceplate and projecting with its free inner end into proximity of the forward end of the tumbler. This pin is preferably screw-headed, 50 and carries at its free end an arm or eccentric,

B, so arranged that by turning the pin L on its axis this arm or eccentric willengage upon the forward end of the tumbler and depress the latter sufficiently to bring its stud M out of engagement with the notch N on the latchbolt, as shown in Fig. 2; but when in normal position, as shown in Fig. 1, it will not interfere with the free action of the tumbler. The forward end of the tumbler is provided with a suitable shoulder or offset, S, to engage with the arm or eccentric R to operate in the prescribed manner. In practice the pin L thus operates as a catch, whereby the tumbler is made inoperative or operative, as desired. \Vith the catch adjusted in its operative position, as shown in Fig. 1, the lock cannot be operated without the use of a suitable key adapted to lift the rear end of the tumbler sufficiently to disengage its stud M from the notch N of the latch-bolt and to throw the latchbolt jointly therewith.

If the pin L is turned half a revolution by means of an ordinary screw-driver, the tumbler is made inoperative and the latch-bolt may be operated freely by turning the knob.

An advantage of my construction is that the nature of the lock is not easilydisclosed by its outward appearance, the serewhead L of the pin L being especially calculated to divert dis covery, while at the same time the lock is ex ceedingly simple and easily operated, either as a latch or look, by simply turning the pin L half a revolution ahead or back by means of a screw-driver or the equivalent use of the thumbnail of the operator.

In manufacturing the lock for an outside mortise door lock I preferably provide it on the side which comes on the inside of the door with a knob, a, which turns in a bearing formed in the lock-case, and has secured to its 0 inner enda hub carrying the two arms I) a. The arm b is adapted to retract the latch-bolt in turning the knob in the proper direction, there being a shoulder, cl, formed on thelatchbolt, against which thearmbstrikes. The arm 5 0 is adapted to engage with a lug, 6, formed near the pivotal point or hub of the tumbler, and by means of said engagement the tumbler is disengaged from the latch-bolt before the latter is retracted, there being a lost motion 10o between the arm I) and the shoulder d. Thus by means of the knob a the lock maybe opened on the inside without using any key.

What I claim as my invention is- 1. In a, combined latch and lock, the combination, with the latch-bolt, of a tumbler pivotally secured below said bolt and operating in a plane parallel therewith, and pro- Vided with an arm projecting forwardly in proximity to the face-plate of the lock, and a pin rotatively secured in the face-plate and provided at its inner end with anarm or eccentric adapted to depress the forward end of the tumbler and hold the same in an inoperative position, substantially as described.

2. In a combined latch and lock, the combination, with the latch-bolt, of a tumbler hung midway of its length upon a pivot to swing in a plane parallel with the plane of the latch-bolt, and having the rearwardly-projecting arm, against which the key operates, and the forwardly-projecting arm carryinga stud to engage into a notch on the latch-bolt, a

spring having its tension'coil secured upon a fulcrum-pin and operating with one arm on the latch-bolt and with the other on the tumbler, and an adjustable catch secured in the faceplate of the lock, adapted to depress the for scribed, of a catch consisting of a screwheaded pin rotatively secured in the face-plate of the lock, and having an arm or eccentric adapted to act on the tumbler, substantially as described.

In testimony whereof I affix my signature, in

presence of two witnesses, this 16th day of 40 August, 1887.

E. HAMBUJEB.

Witnesses:

H. S. SPRAGUE, J AS. WHITTEMORE.

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