US 4,782,677 AGranted

Lock repair plate for surface mounted bolt casings

OwnerJames O'Garainventor

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Abstract

The lock repair plate has threaded holes at the same locations as the holes in a standard mounting plate, the threaded holes being in registration with the holes in the bolt casing, which are traversed by machine screws for mounting the casing on the repair plate. The repair plate is further provided with a plurality of screw holes offset from the threaded holes and which are traversed by plate screws for mounting the repair plate on a door, the plate also being formed with an opening through which the tongue of the lock cylinder can extend, the opening being flanked by first and second pairs of apertures formed in the plate and being selectively in registration with the standard threaded bores of the cylinder which flank the tongue, one of the pair of apertures being traversed selectively by a pair of cylinder screws for securing the cylinder to the plate. A bump is formed on the outwardly facing surface of the plate as an indicator for insuring that the outwardly facing surface is not mounted facing the door.

Claims21

Dependent claims

A lock repair plate assembly for a surface mounted bolt casing, said assembly comprising:

a plate having an opening through which an operating tang can connect a lock cylinder with said casing;
a plurality of threaded holes provided in said plate at locations for registration with respective holes formed in said bolt casing and normally used for securing said casing directly to a door;
respective casing screws having matching threads with those of said threaded holes passing through said respective holes of said casing and engaging said threaded holes of said plate for mounting said casing on said plate;
a plurality of screw holes formed in said plate and offset from said threaded holes for enabling said plate to be mounted on said door by respective plate screws traversing said screw holes in a first position of said plate at one edge of said door;
a first pair of apertures formed in said plate flanking said opening for registration with threaded bores of said cylinder in said first position of said plate;
a second pair of apertures formed in said plate flanking said opening for registration with said threaded bores of said cylinder in a second position of said plate at another edge of said door;
a pair of cylinder screws traversing selectively one of said pairs of apertures for engagement with said threaded bores for securing said cylinder to said plate, each of said threaded holes being formed in a respective insert provided in said plate, said insert being formed with a flange seated in a recess and abutting a rearwardly facing shoulder formed in said plate for preventing said insert from being pulled out of said plate from an outwardly facing surface thereof, said inserts being flush with said outwardly facing surface and with an inwardly facing surface of said plate;
and
indicator means on an outwardly facing surface of said plate opposite said door for insuring that said outwardly facing surface is not mounted facing said door.

6 more elements

A lock assembly for a door comprising:

a plate formed with a plurality of screw holes traversed by respective plate screws for mounting said plate on said door;
indicator means on an outwardly facing surface of said plate opposite said door for insuring that said outwardly facing surface is not mounted facing said door;
an opening formed in said plate;
a lock cylinder disposed in said door and provided with a tongue extending through said opening in said plate, and a pair of threaded bores formed in said cylinder flanking said tongue;
first and second pairs of apertures formed in said plate flanking said opening and being selectively in registration with said threaded bores in respective first and second positions of said plate on said door, one of said pairs of apertures being selectively traversed by a pair of cylinder screws for engagement in said threaded bores for securing said cylinder to said plate;
a plurality of threaded holes provided in said plate offset from said screw holes;
a casing formed with a plurality of holes arranged at locations for registration with said threaded holes and normally used for securing said casing directly to said door, respective machine screws having matching threads with those of said threaded holes traversing said respective holes of said casing and engaging said threaded holes of said plate for mounting said casing on said plate;
and
a displaceable bolt disposed in said casing and operatively connected with said tongue of said lock cylinder, each of said threaded holes provided in said plate is formed in a respective insert provided in said plate, said insert being formed with a flange seated in a recess and abutting a rearwardly facing shoulder formed in said plate for insuring that said insert cannot be pulled out of said plate from the outwardly facing surface thereof, said inserts being flushed with said outwardly facing surface and with an inwardly facing surface of said plate.

6 more elements

Dependencies are inferred from the claim text.