US84391A - Improvement in combined latch and lock - Google Patents

Description

abate/r1 saw easas w ARNOLD SPRAGUE, OF POLAND, NEW YORK.

Letters Patent .No. 84,391, dotted November 24, 1868.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, ARNOLD SPRAUGE, of Poland, in the county of Herkimer, and State of New York, have invented certain new and useful Improvements in a Combined Latch and Look, ofivhich the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, which make part of this specification, and in which 1 Figure 1 represents a view of my improved latch and lock in elevation, the parts being shown in the position which they assume when locked, and the cover of the case removed to show the construction more clearly;

Figure 2 represents a horizontal longitudinal section of the same; and

Figure'3, a view in elevation when unlocked, and thecover of the case removed.

bears against a fixed stop in the case to receive the lateral pressure of the latch, and with tumblers, by means of which it is held either in or out of gear with the latch, to lock and unlock the same.

In the accompanying drawings- A represents a rotary latch, which is mounted in a case 01' frame, A. The latch is provided with a short neck or journal, A", fig. 2, working in a suitable bearing in the case, and is turned by the knobs B. A bolt or catch, a, is formedin "one piece with the latch, and engages in a suitable hasp upon the door-frame. The latchis prevented from being turned too far, in either direction, by a stop, b, attached to the case, which strikes the ends of a segmental slot, a, in the latch at the proper limits of its traverse' A curved recess, A,

is formed in the latch, opposite to .the bolt a, in which an eccentric, B, which forms thelock, engages, and is released therefrom by being rotated by a key, when the latch is to be unlocked. The eccentric Bis provided with journals, B which rest in hearings in the I described.

case A and cover a, and has a horn or projection, b, uponits periphery, which bears against a fixed stop, F, on the case, when the eccentric is in gear with the recess A of the latch, to sustain any pressure which is brought to bear to raise thelatter; Tumblers C are arranged one above the other in the eccentric B, each having a curved spring, 0, which bears against a stop, e, thereon. Slots (2 and recesses e are .formed in the tumblers, in which stops D and E, attached to the case, catch when the latch is locked and unlocked, and prevent further rotation of the eccentric.

In fig; 1 the parts are shown as looked, a portion of the periphery of the eccentric entering the recess A of the latch, and the eccentric being held in that position by the slots d of the tumblers, catching upon the stop D. To unlock the latch, the key is insert-ed into the key-hole B", and the tumblers O pressed suificiently far towards the latch to enable them to be drawn clear of the stop 1), when the eccentric is rotated by turn ing the key until it assumesthe position shown in fig. 3, whenrthe'latch can be turned atjpleasure. When the .key is withdrawn, the springs 0 force the tumblers uptowards the' stop E, which engages in the recesses e, and prevents the-eccentric from turning.

The case A is provided with grooves, b, at the back 7 of the latch, to diminish frictionand wear thereon.

The cover a is attached .to the case by screws, in the usual manner.

It will be seen that this device furnishes a ready means of looking a latch, and thereby enables the extra lock and bolt to be dispensed with. i At the same time, its first costis small, and its construction and operation simple. 1

Having thus fully described my invention, l

What I claim therein as new, and desireftosecurea.

by Letters Patent, isl 1. The combination of the slottedvibrating'latch a ,'provided with a stop, I), and the eccentric -'B,with5 stops D E, arranged and operating substantially as 2. In combination with the said eccentric, the springtumblers O and stops D E, arranged and operating substantially as described. a

- ARNOLD SPRAGUE. Witnesses:

ALVAH J. PULLMAN, L. H. FRANKLIN.

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