US13163A - Locking-latch for doors - Google Patents

Description

UNITED STATES PATENT OFFICE.

EDMUND FIELD, OF GREENWICH, CONNECTICUT.

LOCKING-LATCH FOR DOORS.

Specicaton of Letters Patent No. 13,163-, dated July 3, 1855.

To all whom t may concern:

Be it known that I, EDMUND FIELD, of Greenwich, in the county of Fairfield and State of Connecticut, have invented a new and Improved Lock for Sliding Doors; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a view of the interior of my improved lock, t-he side of the casing nearest the eye being removed, and showing the lock in an unlocked state. Fig. 2, is the same view as Fig. 1, with the exception that the parts are shown in two different positions.

Similar letters of reference indicate corresponding parts in the two figures.

To enable`others skilled in the art to fully understand and construct my invention I will proceed to describe it.

A represents the casing of the lock, which may be of rectangular form, and B is a sliding bolt which works on a stump (a) said stump passing through a slot (o) in the bolt. Between the bolt B and the casing there is a guard tumbler C, shown by dotted lines in both figures. One end of this guard tumbler works on the stump (a), and the opposite end is provided with a projection (c) against the back side of which a pin (d) on the bolt catches when the bolt is thrown forward as will be hereafter shown.

D is a spring which acts upon the bolt, and E is a spring which acts upon the guard tumbler.

Just below the bolt B there is a catch F the inner end of which works on a pivot (e). The outer end of the catch passes through a slot or opening (f) in the front of the casing A, said slot being suiiciently long to allow the outer end of the bolt B to pass through.

To one side of the framing of the door there is secured a slotted bar G, and a mortise (g) is made in the framing over which the bar G is secured, the lower edge of the slot in the bar G being some distance above the lower edge of the mortise (g).

)When the door is closed the lower or inclined edge at the outer end of the catch strikes against the lower edge of the slot in the bar G and the catch passes through the slot and is forced down over the lower edge of said slot by the spring D which acts both upon the bolt and catch. The key is then inserted in the key hole and turned, and the guard tumbler C is first raised so that the projection (c) will be raised from the pin (d) attached to the bolt. The key then throws the outer end of the bolt through the slot in the bar G and the catch is thereby prevented from being raised until the bar is thrown back.

The catch F is operated by a knob in the usual manner. The red lines Fig. 2, show the position of the parts when the lock is in a locked state.

Now, by this relative arrangement of the locking bolt and catch (F), both hung and operating as specified, it will be perceived that sliding bolt (B), when shot forward, does not simply serve to lock the catch (F) to or in its closed position, but to make the catch as well as the sliding bolt a locking bar to unite the door to its fixed frame, the better to resist violence in attempting to burst o-pen the door, and, as the sliding bolt (B), when locked, stops the race or play aperture of the catch, the catch is more securely protected from being picked and the interior of the lock from receiving dust or dirt, while, it should be observed, from the description here given of the manner in which the parts are arranged and operate, that when the sliding bolt (B) is in its unlocked position, both it and the tumbler guard (C) are raised and lowered or set in motion, without producing any locking action, every time the catch is operated to fasten or unfasten the door, which action or effect of the catch upon the bolt and its tumbler guard will elfectually serve to prevent the locking bolt and tumbler guard adhering to each other or the lock casing by rust, or sticking, and will keep them in a free and smoothly operative condition even though the locking bolt (B) may not be used for a lengthened period to secure the door which in a general way may be fastened simply by the catch, and thus the sticking of the bolt and locking parts that so commonly occurs where the bolt has stood idle for a lengthened period frequently causing breakage of the key when inserted for the first time afterward to shoot the bolt, is avoided; and all the operative parts connected with the bolt, its tumbler guard, spring et cetera are kept in perfect action by the play of the catch.

I claiin nothing neW in the looking bolt or catch separately Considered nor yet in and so that the locking-bolt With its tumbler guard and other appurtenance or appurtenances, when not being used to look the door, are set in motion by the oateh each time it is operated, substantially as and for the purposes Set forth.

EDMUND FIELD.

Vitnesses:

RICHARD B. CARPENTER. ISAAC O. CLOSE.

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