US 3,940,956 AGranted

Door lock

OwnerVincent J. Stevensinventor

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Abstract

A door lock including a first base element adapted to be mounted to a door frame and a second base element adapted to be mounted to a door. A first arm is pivotally mounted to the first base element and the second arm is pivotally mounted to the second base element. The arms are constructed so as to receive a fastener so that when the fastener is positioned in locking engagement therewith with the first base element mounted on a door frame and the second base element mounted on a door, the door will be locked to the frame with limited pivotal movement of the arms being permitted as well as the door with respect to the frame.

Claims5

Dependent claims

A door lock comprising:

a first base element of high strength, rigid, unitary material and being of thick cross section;
the first base element being L-shaped in configuration with one leg being adapted for fastening the element to the inside of a door frame and the other leg of the first base element extending substantially perpendicular therefrom and having a pivot orifice therethrough;
a second base element of high strength, rigid, unitary material and being of thick cross section;
the second base element being L-shaped in configuration with one leg adapted to be fastened to the inside surface of a door adjacent the door frame;
the other leg of the second base element extending substantially perpendicular to the first leg thereof and having a pivot orifice therethrough;
a first arm of high strength, rigid, unitary material and being of thick cross section and having a pivot orifice adjacent one end thereof adapted to be aligned with the pivot orifice in the other leg of the first base element so as to receive a pivot pin inserted through the aligned openings whereby the first arm is free to pivot with respect to the rigidly mounted first base element;
a second arm of high strength, rigid, unitary material and being of thick cross section and having a pivot orifice adjacent one end thereof adapted to be aligned with the pivot orifice in the other leg of the second base element so as to receive a pivot pin through the aligned orifices thereby pivotally attaching the second arm to the second base element;
fastener receiving surfaces in the end of each arm distal from the pivot orifice therein and the arms being of predetermined rigid length and being of sufficient thickness to resist breaking and the fastener receiving surfaces adapted to be aligned with one another for receipt of a fastener element and locking thereof;
and
a fastener element adapted to be removably fastened to the fastener receiving surfaces on the arms so as to rigidly interconnect the arms and lock the door to the door frame while permitting limited movement of the door with respect to the door frame upon pivotal movement of the interconnected arms so that the door can be partially opened and a person from outside of the enclosure can reach the fastener and unlock the fastener and permit the arms to be displaced from one another and the door to be opened and the high strength, rigid, unitary material of thick cross section of the arms and base elements substantially hindering a person from breaking or cutting the lock.

7 more elements

Dependencies are inferred from the claim text.

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Abstract

A door lock comprising:

a first base element of high strength, rigid, unitary material and being of thick cross section;
the first base element being L-shaped in configuration with one leg being adapted for fastening the element to the inside of a door frame and the other leg of the first base element extending substantially perpendicular therefrom and having a pivot orifice therethrough;
a second base element of high strength, rigid, unitary material and being of thick cross section;
the second base element being L-shaped in configuration with one leg adapted to be fastened to the inside surface of a door adjacent the door frame;
the other leg of the second base element extending substantially perpendicular to the first leg thereof and having a pivot orifice therethrough;
a first arm of high strength, rigid, unitary material and being of thick cross section and having a pivot orifice adjacent one end thereof adapted to be aligned with the pivot orifice in the other leg of the first base element so as to receive a pivot pin inserted through the aligned openings whereby the first arm is free to pivot with respect to the rigidly mounted first base element;
a second arm of high strength, rigid, unitary material and being of thick cross section and having a pivot orifice adjacent one end thereof adapted to be aligned with the pivot orifice in the other leg of the second base element so as to receive a pivot pin through the aligned orifices thereby pivotally attaching the second arm to the second base element;
fastener receiving surfaces in the end of each arm distal from the pivot orifice therein and the arms being of predetermined rigid length and being of sufficient thickness to resist breaking and the fastener receiving surfaces adapted to be aligned with one another for receipt of a fastener element and locking thereof;
and
a fastener element adapted to be removably fastened to the fastener receiving surfaces on the arms so as to rigidly interconnect the arms and lock the door to the door frame while permitting limited movement of the door with respect to the door frame upon pivotal movement of the interconnected arms so that the door can be partially opened and a person from outside of the enclosure can reach the fastener and unlock the fastener and permit the arms to be displaced from one another and the door to be opened and the high strength, rigid, unitary material of thick cross section of the arms and base elements substantially hindering a person from breaking or cutting the lock.

7 more elements