US1122937A - Sliding-door lock. - Google Patents

Description

H. JACKSON. SLIDING DOOR LOOK.

APPLICATION FILED JUNE 2, 1914.

Patented Dec. 29. 1914 Fig.1. 7

Hvwwtoz HWJQBKSUR/ llllllllll THE NORRIS PETERS CO., PHOTO-LITHO., WASHINGTON Dv C.

UNITED srn'rns PATENT OFFICE.

HENRY JACKSON, OF LUDLOW, KENTUCKY, ASSIGNOR 0F C NE-HALF T0 LUCY LAUGHLIN, OF LUDLOW, KENTUCKY.

SLIDING-DOOR LOCK.

Specification of Letters Patent.

Patented Dec. 29, 1914:.

Application filed June 2, 1914. Serial No. 842,414.

To all whom it may concern:

Be it known that I, HENRY JACKSON, a citizen of the United States, residing at Ludlow, in the county of Kenton and State of Kentucky, have invented new and useful Improvements in Sliding-Door Locks, of which the following is a specification.

This invention relates to improvements in locks and has particular application to a lock for use in conjunction with sliding doors, gates and the like.

In carrying out the present invention, it is my purpose to provide a lock which will be found especially useful in conjunction with sliding doors, gates and the like and which will embody among other features a pair of parallel jaws mounted within a casing and projecting outwardly of one end wall thereof and having the inner ends thereof pivoted within the casing and the confronting edges at the outer ends thereof formed with coacting lugs designed to engage a keeper and means holding the jaws normally against opening movement, means being provided for releasing the holding means and simultaneously swinging the jaws to open position so that the hasp engaged by the lugs will be released.

A further object of my invention is to provide a lock of the class described which will embrace the desired features of simplicity, efficiency and durability, which may be manufactured and marketed at a minimum expense and which when installed will operate effectively under all conditions.

With 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 claims.

In the accompanying drawing; Figure 1 is a view in side elevation of a sliding door lock constructed in accordance with the present invention. Fig. 2 is a longitudinal vertical sectional view through the lock. Fig. 3 is a cross sectional view on the line 33 of Fig. 2. Fig. 4 is a view in side elevation of the key controlling the lock.

Referring now to the drawing in detail, 1 designates a substantially rectangular casing.

In the present instance, fastening ears 2 project outwardly from one end wall and the opposite side walls of the casing whereby the latter may be fastened to one side of a sliding door adjacent to the forward edge thereof. If desired, the securing lugs 2 may be illuminated and the casing set into a mortise in the forward edge of the door.

The forward end of the casing, that is the end flush with the forward edge of the door 1s formed with an opening 3 and disposed w thin the casing and lying in parallelism wlth each other are jaws 1, 4c projecting outwardly of the forward end of the casing by way of the opening 3 therein and havmg the confronting edges at the forward ends thereof cut away as at 5 and formed with inwardly extending noses 6.

The inner ends of the jaws l, 4 are mounted upon plvot pins 7 extending transversely of the casing and having the opposite ends thereof secured to the forward and rear walls of such casing. Normally, the confrontmg edges of the jaws 4, 4 engage each other and the adjacent ends of the noses 6 obstruct the entrance to the space formed by the cut away portions 5 of the jaws and in order to maintain the jaws in normal position suitable tension means are employed. In the present instance, coiled expansion springs 8, 8 are interposed between the outer edges of the jaws and the adjacent edge wall of the casing, such springs acting upon the jaws to maintain the latter in normal position and restore the same to such posltlon succeeding the swinging thereof about the pivot pins 7.

9 designates a keeper comprising a segmental casing 10 and a plate 11 secured within the casing 10 at the open end thereof and closing such end. This plate 11 is formed with a longitudinal slot 12 and arranged transversely of the slot approximately centrally thereof and secured to the opposite side walls is a cross bar 13.

Secured to the curved end wall of the casing 10 adjacent to the opposite ends of such wall and projecting outwardly therefrom are securing lugs 14, 14 whereby the casing may be fastened to the door jamb. If desired, the securing lugs 14 may be eliminated and the casing set into a mortise formed in the door j amb.

In practice, the casing 1 of the lock mechanism is fastened to the outer surface of the door by means of the lugs 2 and the forward end of such casing, that is the end through which the jaws 4, 4 extend, lies flush with the forward edge of the door, the doors and casing lying in a horizontal plane. Similarly, the casing 10 is fastened to the outer side of the jamb in a plane coincident with that of the casing 1 of the lock mechanism and the plate 11 closing the forward end of the casing lies flush with the adjacent abut- Inent face of the jamb. In this position of the parts, the cross bar 13 within the slot 12 formed in the plate 11 of the keeper 9 lies in the path of movement of the noses 6 on the outer ends of the jaws 4 and when the door is slid to closed position the noses 6 engage the cross bar 13 and in the continued movement of the door, such noses ride over the bar 13 and the inner edges thereof lock behind the bar and are disposed within the casing 10, the springs 8 permitting the jaws to swing open upon the noses engaging the cross bar and forcing the jaws to closed position immediately that the noses pass the cross bar and are relieved of the influence thereof.

The confronting edges of the jaws 4, 4 are formed, approximately centrally thereof, with alining grooves registering with a keyhole 15 formed in the front side wall of the casing 1. Projecting into the grooves from the rear wall of the casing and alining axially with the circular portion of the keyhole is a post 15 and rotatably mounted upon the post 15 is an actuating cam 16 having the face thereof adjacent to the keyhole formed with a depression 17 contiguous the post 15.

Mounted upon the bottom edge wall of the casing 1 and extending upwardly therefrom are bearings 18 and slidably mounted within the bearings 18 is a horizontal bar 19 having the opposite ends thereof formed with upwardly projecting dogs 20, 20. A spring 21 has one end bearing upon the rear end wall of the casing and the opposite end in engagement with the confronting extremity of the bar 19 and acts to hold the bar normally at its limit of forward movement.

Connected with one side of the bar 19 and projecting upwardly therefrom is an arm 22 having the upper end thereof formed with a notch and disposed below and in proximity to the keyhole 15.

The bottom edge of the lower jaw 4 is formed with a recess 24 adapted to receive the dog 20 on the forward end of the bar 19 when the latter is slid rearwardly within the casing against the action of the spring 21.

25 designates a key comprising a shank having one end thereof formed with a longitudinal bore 26 and the opposite end equipped with a thumb piece 27.

Formed integral with the end of the shank having the bore therein and projecting outwardly therefrom parallel with the axis of the shank is a lug 27 while extending laterally from the shank adjacent to the lug 27 and at right angles thereto is a bit 28.

WVhen the jaws are in closed position the spring 21 holds the bar 19 at its limit of forward movement within the bearings 18 and the dogs 20 lie immediately below the lower edge of the bottom jaw 4 and so prevent movement of the latter jaw relatively to the upper jaw. When it is desired to relieve the lower jaw of the influence of the dogs 20 on the bar 19 and swing the jaws 4, 4 to open position so that the noses 6 will be relieved of the influence of the cross bar 13 of the keeper whereby the door may be moved to open position, the key 25 is inserted in the keyhole 15 and the bore 26 of the key receives the post 15, while the lug 27 enters the notch 17 in the actuating cam 16 while the bit 28 enters the recess 23 in the outer end of the arm 22. The key is now rotated and in the movement of the bit 28, the bar 19 slides rearwardly within the casing against the action of the spring 21 thereby moving the dog 20 at the rear end of the bar behind the inner end of the lower jaw and carrying the dog 20 at the forward end of the bar 19 into the plane of the recess 24 in the bottom edge of the lower j aw. Simultaneously with the sliding of the bar 19 to inactive position the lug 27 within the recess 17 in the actuating arm 16 revolves the latter about the post 15 whereby the opposite ends of the cam engage the walls of the grooves 14 in the confronting faces of the jaws and swing the latter to open position against the action of the springs 8. The door may now be slid to open position. Succeeding the opening of the door the key is removed and the jaws are restored to normal locking position, while the bar 19 slides to normal position under the action of the spring 21.

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. It will be seen that I have provided a sliding door lock whereby the door will be effectively held against opening movement and wherein the parts are so correlated and arranged as to reduce the possibility of derangement to a minimum.

The outer sides of the lock casing and keeper casing adjacent to the confronting ends. thereof are preferably formed with lugs 29, 29 formed with alining apertures adapted to receive a car seal when the jaws of the lock are within the hasp.

In order to hold the bar 19 against forward movement under the action of the spring succeeding the sliding of such bar under the action of the bit 28 of the key, a horizontal spring arm 30 has one end fixed to the lower pivot post 7 and the opposite extremity formed with a depending tooth 31 disposed in the path of movement of the upper extremity of the arm 22 and adapted to enter the recess 23 in such arm when the bar 19 is slid rearwardly against the action of the spring 21. Extending upwardly from the spring arm 30 is a vertical handle 32 having the upper end thereof equipped with an outwardly projecting knob 33 projecting through a slot formed in the front wall of the lock casing and capable of sliding movement within such slot. By means of this construction, it will be seen that when the bar 19 is moved rearwardly under the action of the key the tooth 31 will enter the recess 23 in the arm 22 and so hold the bar 19 against forward movement. Thus, the lower jaw 4 is free of the influence of the dogs 20, 20 and will swing to open position when engaged by the bar 13 in the closing of the door. To disengage the dog 31 from the recess 23 the knob 33 is elevated thereby swinging the dog end of the spring arm upwardly to release the arm 22.

I claim:

A sliding door lock comprising a casing,

jaws within said casing projecting out wardly of one end wall thereof and having the inner ends thereof pivoted within the casing and the confronting edges at the outer ends thereof cut away and formed with coacting noses, a bar within said casing below one of said jaws and capable of sliding movement, a dog extending upwardly from said bar adjacent to the rear. end thereof, an arm extending upwardly from the bar at the forward end thereof and cooperating with the dog, a spring holding said bar normally in active position whereby said arm and dog engage the lower edge of the adjacent jaw to hold the latter against movement to open position, said arm having the upper end thereof formed with a notch, a spring arm pivoted within the casing and having one end thereof formed with a depending tooth adapted to engage the notch in said arm in the movement of the bar to release position to hold the bar against forward movement under the action of said spring, and manual means for actuating said spring arm to lift the tooth thereon out of engagement with the notch in said arm whereby the spring may react to throw the bar to active position.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY JACKSON.

Witnesses:

DONALD CRIssINoER, J. E. FLEMING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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