US1764898A - Lock - Google Patents

Description

S. SEGAL June 17, 1930.

LOCK

Filed July 7, 1928 INVENTOR.

A ATTORNEYS.

Patented June 17, 1930 UNITED STATES PATENT OFFICE SAMUEL SEGAL, OF NEW YORK, N. Y., ASSIGNOR TO SEGAL LOOK & HAROWAIBE CO.,

INQ, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK LOCK Application filed July 7, 1928. Serial No. 291,069.

This invention rel ates to a lock structure and specifically aims to provide an improved mechanism of this character serving to prevent the actuation of the look by a non-authorized person.

It is well appreciated by those skilled in the art that considerable difficulty has been experienced in connection with locks in that a burglar has quite often succeeded in actuating the lock mechanism by simply ripping the cylinder or other exposed key structure from a door and thereafter, by the use of a proper implement such as, for example, a screw driver, actuating the crank of the lock mechanism to retract the bolt of the latter.

With this in mind the present invention has, as its primary object, the provision of a novel and improved mechanism whereby the actuation of a lock in this manner will be prevented.

A further object of the invention is that of providing a mechanism which will in no way interfere with the normal operation of the lock and which mechanism, furthermore, will not interfere with the ready application of the lock to a door.

1 A still further object is that of furnishing a mechanism in which, when unauthorized operation is once attempted the parts will be thrown to a position at which they cannot be released by a person on the outside of a door.

Another object is that of furnishing such a mechanism in which the parts will be few in number and individually simple and rugged in construction, these parts being readily assembled and applicable to locks of any desired type and the operation of which Wlll at all times be positive.

With these and further objects in mind reference is had to the attached sheet of drawings illustrating one practical embodiment of the invention and in which:

Figure 1 is a somewhat ideal perspective view of one form of lock showing the improved structure of the present invention associated therewith;

Fig. 2 is a perspective'view showing the mechanism afore referred to, in front position;

Fig. 3 is a face view with the parts in normal or retracted position, and

Figs. 4:, 5 and 6 illustrate the elements of the switch mechanism.

In these views the numeral 10 indicates a key cylinder from the plug 11 of which a tail piece 12 extends rearwardly. In accordance with the conventional construction this cylinder is secured as, for example, by bolts 13 to a mounting plate 14 provided on the inner face of the closure with which the lock is associated. The lock illustrated has been shown as including a case 15 from which a bolt structure 16 extends, the rear face of which case is closed by a cover plate 17 mounting a crank (not shown) which is secured to a rotatable plug 18 formed, in the present instance, with a slot for the reception of the end of the tail piece.

At this time it is to be understood that all of the foregoing is illustrative and that in lieu of the key mechanism, tail piece and lock shown, any desired equivalent mechanisms might be employed and that the mounting plate 14 might be dispensed with if it were desired to do so. Likewise, in connection with the structure hereinafter described, it will be appreciated that according to the type of lock in connection with which the same is employed, various changes might be made and that,'aside from changes incident to the employment of the invention in connection with various types of lock, the structure of theimechanism mightbe varied in numerous particulars. 7

.Thus, the numeral 19 indicates a casing which, in the present instance, is formed with outwardly extending flange portipns 20 for reception by suitable openings or depressions in the cover plate 17. This casing is formed withan opening 21 for the passage of the tail piece 12 and mounted within this casing is a bolt or plate 22 formed witha similar opening 23 capable of being registered with the opening 21. However, the parts tend to shift to a position at which the openings do not register as, for example, by the use of a spring 24 having one of its ends mounted by the other end thereof, and in one of its extreme positions, as shownin Fig. 3, the openings 21-23 are in alignment,,while the spring 24 tends to move the plate to the position shown inFig.2. v v With a view to dead-locking the plate in this latter position a tumbler or bolt may be employed which includes a body 26 having a raised portion 27 in one of its edges and a bearing portion 28 in its opposite edge, the latter seating within a rounded" depresslon.

29 formed in the plate 22. 'A spring 3O carried by the latter bears against the inner edge of the body 26 and serves to normally project the raised portion 27 into a depression or opening 31 formed in the 'case. It is obvious that when the parts are in this position the plate 22 may not be forced rearwardly and this position of the parts will be automatically established upon the plate being released and projected by the spring 24. However, by simply pressing against the beveled end 32 of the tumbler or bolt, as, for example, by a pin 33, the former will be swung downwardly so that the projecting portion 27 will be retracted from within the opening or depression 31 and continued pressure will result in they parts being bodily retracted to a point at which the openings 21-23 align. v

In utilizing a device of this character it will be obvious that the casing 19 is mounted, for example, upon the cover plate 17. Thereafter, the door is drilled in the usual manner and the mounting plate and the cylinder are applied thereto, conceding of course, that the former is employed. The mechanic will the now simply mount the lock casing 15 upon the door and at the time of the mounting will, by inserting the pin 33 through the opening 34 in the lock case, retract-the tumbler and consequentl the plate to the position shown in Fig. 3. hereafter, the lock may be completely applied, exercising the usual care to have the tail piece extend within the slot of plug18.

The lock will now function in the usual manner, but if anyone succeedsin forcing a key mechanism as, for example, the cylinder 10 from the door, it is obvious that such movement will result in a withdrawal of the tail piece from within the slot of the plug and the openings 2321. Consequently, the plate will sna to its closed position in which it will be retalned by the dead-lock structure and a burglar will now find that the plug is inaccessible even with the cylinder and the tail piece ripped clear of the door. As afore brought out, the plate may be retracted only from the inside of the door and thus the lockoperating mechanism will continue inaccessible.

parting from the spirit of the invention asdefined by the claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is I 1. In combination a bolt, means for moving the same, a key mechanism, a connecting element between said mechanism and said bolt-moving means, means operating automatically and associated with said bolt-moving means to render the latter inaccessible upon said connecting element being detached therefrom and means for preventing a subsequent operation of said last named means.

2. In combination a bolt, means for moving the same, a key mechanism, a connecting element between said mechanism. and said bolt moving means, means operating automatically and associated with said boltmoving means to render the latter inaccessible upon said connecting element being detached therefrom and means for deadlocking said last named means.

3. In combination a bolt, means for moving the same, a key mechanism, a connecting element between said mechanism and'said bolt-moving means, means operating automatically and associated with said bolt-moving means to render the latter inaccessible cluding a casing, a plate movable within said casing, said plate and caslng being formed 1'- vwith openings, means for normally urglng said plate'to a position at which said openings will be non-aligned and means for automatically locking such plate in said latter positiom 6. A device of the character described including a casing, a plate movable within said casing, said plate and easing being formed with openings, means for normally urging said plate-to a position at which said openin s will be non-aligned, means for automati ca ly locking such plate in said latter position and means whereby said last named means-may be released and said plate may be moved to a position at which the openings ali v 7. A device of the character described in cluding a casing formed with an Opening, a

plate also formed with an opening and mov able within. said casing, a spring carried by said plate and engaging said casing to urge said plate to a position at which the opening thereof does not align with said casing'open- I with anopening,

bodily shifting of the same,

and acting automatically upon of said actuating element to close the second ing, a bolt for deadlocking such plate in the latter position and a spring carried by said plate and engaging said bolt for normally urging the same into locking position.

8. In combination a lock casing, a bolt associated therewith, a cover plate for said casing, means carried by said plate for actuand bodily shifting said plate to a position at which the opening thereof aligns with said casing opening.

10. A device of the character described including, in combination, a casing, flange ortions forming a part of said casing, a p ate movable within said casing, said plate and easing being formed with openings, means tending normally to project said plate to bring said openings into non-aligned condition, and means carried by said plate and 00'- operating with a portion of the flange of said casing to normally prevent a return of said plate to a position in which said openings are aligned.

In testimony whereof I afiix my signature.

SAMUEL SEGAL.

cluding a casing formed with an opening, a 1

plate movable within said casing and also formed with an opening, a bolt associated with said plate and normally cooperating with said casing to prevent amovement of the plate, the end of said bolt being beveled whereby ressure applied to such end surface will resu t in a retraction of said bolt and a together with said plate, to a point at which the opening of the latter aligns with the opening of said casing.

11. A device of the character described including, in combination, a lock casing formed I a bolt, operating means within said casing for projecting and retract I ing said bolt, a second casing secured to said lock casing and being formed with an openmg 1n line with the first named opening, an

actuating member extending through said I openings and connected 'to said operating means, and means within said secondcasihg the removal casing opening and to render said operating means inaccessible.

2 12. A device of the character described in-

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