US1130034A - Door-lock. - Google Patents

Description

T. A. SPRADLBY.

DOOR LOOK.

APPLICATION FILED SEPT. 16, 1913.

1,130,034, Patented Mar. 2, 1915.

' .ZFQLZ.

MINIMUM HmIWUNUIIIWIHWHUWHHWHHWIWW 2 *5 ,'/6 3 17 1 O l 2 Q JQ mHIIHIHUHHH I I H UHHIIIQHJHIIIIllIIHHIIHIHHHIHWjHHHH .a'rnr EX THADIJEUS A. SPEADLEY, OF CROZEW'ELL, ALABAMA.

DOOR-LOCK.

icense.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed September 16, 1913. Serial No. 780,111.

To all whom it may concern Be it known that l, Trnionnos A. SPRAD- er, a citizen of the United States, residing at Cropwell, in the county of St. Clair and State of Alabama, have invented new and useful Improvements in Door-Locks, of which the following is a specification.

This invention relates to improvements in door locks and has particular application to a sliding door lock.

In carrying out the present invention, it is my purpose to provide a sliding door lock which will embody among other features jaws pivoted upon a common center scissors fashion and movable to open and closed poitions about such center, and a keeper adapted to be engaged by the jaws when the door equipped with the lock is moved to closed position.

It is also my purpose to provide a sliding door lock which will embrace the desired features of simplicity, efficiency and durability, one which may be manufactured and marketed at a minimum expense and one which may be readily and conveniently operated.

lVith the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claim.

In the accompanying drawing; Figure 1 is a view in side elevation of a sliding door lock constructed in accordance with my present invention, one side plate of the casing being removed and the parts shown in locking position. Fig. 2 is a sectional view on the line 22 of Fig. 1 looking in the direction of the arrow Fig. 3 is a perspective view of the aws removed from the casing.

Referring now to the accompanying drawing in detail, the numeral 1 designates a lock casing constructed of any suitable material and preferably of rectangular outline. This casing is adapted to be connected with a sliding door in any suitable manner and is provided interiorly with a vertical plate 2 spaced apart from the forward end wall of the casing and in parallelism therewith, the forward end wall being formed with an entrance opening 3.

4, 5 designate the jaws of the lock each comprising arms 6, 7 offset from each other and having the adjacent ends connected with a hub 8 formed with a bore 9. The hub 8 of the jaw 5 has one face thereof cut out so as to receive the hub of the other jaw and when the jaws are assembledthe bores 9, 9 in the hubs thereof register with each other to receive a horizontal pivot bolt 10 carried by one of the side walls of the casing 1 approximately centrally thereof. When the jaws are assembled, the rear arm 7 of the lower jaw 5 overlies the rear arm 7 of the upper jaw, while the arm 6 of the upper l overlies the similar arm of the lower 5 incident to the arms of each jaw being offset from each other and connected with the hub. The forward arms 6, 6 of the aws are adapted to work within a slot formed in the plate 2 and the confronting faces of such arms at the forward ends thereof are formed to provide hooks 11, 11 coiperating with each other to receive and hold the arrow shaped head 12 of the stationary keeper 13. Sub

stantially inclosing the rear ends of the arms 7, 7 of the jaws is a U-shaped yoke 14 having the free end of the opposite limbs thereof outturned to provide securing flanges 15, 15 whereby the yoke may be fastened to one side wall of the casing 1. Projecting outwardly from the interconnecting member of the yoke approximately centrally thereof is a barrel 15 within which is rotatably mounted a shank 16 carrying a cam 17 disposed between the contacting edges of the arms 7 7 of the jaws and working within cavities 18, 18 formed in such edges of the arms. Projecting outwardly from the opposite side of the cam 17 coaxial with the shank 16 is a stud 19 rotatably mounted within a bearing carried by the inner surface of the adjacent side wall of the casing and cotiperating with the barrel 15 to support the cam. Normally, the jaws are held in closed position and for this purpose I employ, in the present instance, a coiled spring 20 encircling a pin 21 carried by the casing between the arms 6, 6 of the jaws immediately adjacent to the pivot point thereof, the opposite extremities of the spring 20 extending outwardly and bearing upon the outer edges of the arms 6, 6 of the jaws to hold the latter normally closed.

From the foregoing description taken in connection with the accompanying drawing, the construction, mode of operation and manner of employing my invention will be readily apparent. When the door equipped with my improved lock slides to closed position, the arrow head 12 of the keeper 13 enters the casing by way of the opening 3 thereinand passes between thehooks 11,- 11 on the respective ends of the arms 6, 6 of the jaws 4:, 5 and in passing the hooks I the jaws are swung about the pivot bolt action of the spring 20. As the jaws are against the action of the spring 20 so that Y swung 'to openposition 'the hooksll, 11 release-- the keeper 13 thereby permitting the 'door to be slid to open position; The key ,is 'given further turnin'g movement so that the" same may bewithdrawn from theikey holein the casing and in such 'furtherfmove- 'ment'the cam is restored to initial position thereby permitting the spring to react and throw the jaws to normal.

While I have herein shown and described I 1 one preferred form of my invention by way i of illustration, I wish it to be understood that I do not limit or confine myself to the precise details of construction herein described and:delineated,las modification and Goples of this patent may be obtained for five cents each, by 'addressing Washington, D. G.

variation bemade within-the scope of j V the claim without departing from the spirit ofthe invention. 7

I claim:

In a sliding door lock, jaws pivoted upon a common center, scissors fashion, and movable to open and closed positions, and ,each

comprising armsoffset from each other and a hub interconnecting said arms and formed with a bore adaptedjto 'aline withithe bore in the other hub, a pivot bolt passed through said aliningboreaa cam mounted-between the arms of said jaws and adapted to be rotated to swing the jawsto open position, a spring-connected :t o, the'remaining arms r of the jaws; and holding the latter. in closed position, al'shank onisaid cam, a ;U- s'h aped r yoke extending over 'thec'am end of said arms, a barrel fixed to thelnterconnectlng member of said yoke and extending, out-' and receiving the latter, hooks formed "on the confronting faces of theispring actuated arms of the jaws,'and a keeper' adapted to I be engaged by said hooks. i

InItestimony whereof I affix my signature 1n presence of-two witnesses.

' \Vitnes'ses: V J. D. Memos,

W. N. MADnox.

wardly therefrom coaxial. with saidshank riannnus A. I SPRADLEY.

the Commissioner of Patents, v

Images