US2466557A - Lock - Google Patents

Description

Patented Apr. 5, 1949 UNITED STATES PATENT ()FFICE LOCK Morris Sachs, New York, N. Y.

Application Marchr5, 1946, Serial No. 651,993

This invention relates to locks, and particularly to door locks, and one of the objects of the invention is to provide a lock of this character having means by which its accurate fitment to doors will be greatly facilitated.

Locks of the kind usually employed upon doors, are provided with a cylindrical portion fitting in a hole cut through the door. On the inside face of the door is secured a casing in whichthe. sliding bolt and associated lock-parts are housed. A stem or bar extends from the cylindrical part of the lock to a bolt-actuating memberthat is contained in the casing. Inattaching the casing to the back of the door it is essential that the casing be accurately positioned so that the stem or bar will readily insert itself in a slot provided in the bolt-actuating member. Careless or unskilled workers, when attaching a, lock of this kind to a door, often find that after the job is completed, the lock is either inoperative or else Works very stifily, this being usually due to the inaccurate alignment of the casing with respect to the stem or bar that projects from the cylinder.

The primary object therefore, of the present invention, is to provide in a lock of this character, means by which the casing is always accurately fitted to the door with respect to the cylinder and the stem or bar projecting therefrom. The result is that with a lock of this kind, even an unskilled Worker cannot fail to properly assemble the parts so that smooth and easy operation of the lock is bound to occur.

More particularly, the invention contemplates the provision of a lock cylinder having a plate for holding it in place, said plate being located on the inside of the door and being provided with one or more laterally-extending projections or aligning lugs which fit into suitable notches or recesses provided for their reception in a portion of the casing. Due to this arrangement, the casing, when fitted over the above-mentioned plate, will receive the projections or lugs in its recesses, and will thus be guided into the proper position for attachment to the face of the door, and this will cause the stem or bar protruding from the cylinder to accurately enter the boltactuator contained within the casing.

In the accompanying drawing, wherein an illustrative embodiment of the invention is shown, Fig. l is a view of the inside face of a part of a door, showing the plate attached thereto; Fig. 2 is a view of the rear face or back of the lock casing, showing the notched or recessed back member thereof for the reception of the lugs 1 Claim. (Cl. 70-451) provided on the cylinder back plate; Fig. 3'is a sectional view through a part of the doorand the cylinder plate, as well as through the lock casing, showing how-the lugs on the'cylinder plate enter the recesses or-notches in the back plate of the casing; Fig. 4 is a sectional view taken at right angles to that of Fig. 3, andFig. 5 is a perspective view of the plate and a part of the back member of the'lock casing, showing how the lugs on the plate enter the recesses or notches provided inthe back member.

In the drawing, 8 indicates a portion ofa-door to-which the lock is attached. A lock of this character is usually provided with a cylinder 2 of conventional construction, containing the usual tumbler mechanism and provided with the stem or bar 3 projectin from its rear end, said stem or bar being received in a slot 5 in a rotative bolt-actuator 6 contained within the bolt casing I and rotative in the rear plate 8 of said casing. The casing 1 contains the conventional sliding bolt and other lock parts which have been herein omitted for simplicity in illustration since the same form no part of the present invention. The rear plate or back member 8 of the casing I is held in place in the casing by a screw I6 entering a post I! forming a part of the casing I.

The cylinder 2 is held in the hole 9 extending through the door, by means of a back plate H], herein referred to as the cylinder plate in order to distinguish it from the back plate 8 of the casing I. Said plate I0 is secured to the cylinder by the screws ll, this being conventional construction. In the present embodiment of the invention, said cylinder plate I0 is provided with a substantially central aperture I2 through which the stem or bar 3 protrudes to enable the same to reach and enter the slot 5 in the bolt-actuator 6, when the casing is attached to the back of the door in proper position over the cylinder plate l0.

Extending laterally from the opposite edges of the cylinder plate Ill are lugs l3 which are adapted to fit into recesses or notches l4 provided in the opposite edges of the back plate 8 of the casing. These two lugs l3 are so located with respect to the recesses N that when the casing I is placed over the cylinder plate Ill and in the proper position to enable the stem or bar 3 to enter the slot 5 in the bolt-actuator 6, the lugs l3 will enter the recesses or notches l4 and will thus accurately position the casing at the proper place on the back of the door and hold it in that position until screws are inserted through the 3 holes I provided in the casing, to attach the casing permanently to the back of the door.

Since the fitment of the lugs l3 into the recesses [4 will accurately position the casing with respect to the plate l0, it will be clear that the correct location of the casing on the back face of the door is merely a matter of placing it in a position where the lugs I3 will enter the recesses II, and when this has been done it will be found that the stem or bar 3 has entered the slot 5 in the actuator 6. It is then only necessary to attach the casing to the back of the door by the usual screws extended through the openings [5, and the job is complete. It will be found that through this accurate setting of the casing with respect to the cylinder, no strain, bending or distortion is imposed on the stem or bar 3 with the result that the lock will operate smoothly and efliciently.

While I have shown and described one embodiment of the invention, it is obviously that various modifications may be made without departing from the spirit of the invention. For example, while the cylinder plate I0 is shown as being provided with two lugs l3, it will be clear that one or more of these lugs might be used. Moreover, while the lugs l3 are shown as being composed of parts which are bent laterally from the side edges of the plate M, such lugs might also be formed by being struck out from the body of the plate, or by separate elements attached to the plate. Other changes will be readily apparent to those skilled in the art, such changes being and the casing part having a back plate spaced inwardly from the back of the casing and closing the rear of the casing and formed with a plurality of recesses extending inwardly from its upper and lower edges to receive said lugs to thereby guide the casing part into a proper position for fastening on the door to enable the casing part to co-operate with the cylinder part.

MORRIS SACHS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 806,003 Roche Nov. 28, 1905 956,005 Voight Apr. 26, 1910 1,642,047 Segal Sept. 13, 1927 1,843,143 Rymer Feb. 2, 1932 1,947,443 Bargman Feb. 20, 1934

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