Method and apparatus for mounting a push/pull handle on a latch
DCFirst Claim
1. An adapter plate for mounting a push/pull handle type door lock assembly on a door having one of several differing lock mortises positioned thereon, wherein said lock mortise is retained between a first and a second side surface of a door, said lock mortise including a central hole therethrough for mounting a mortise operating key therein, and a pair of apertures on opposite sides of said central hole at predetermined radial distances therefrom and predetermined arcuate positions therearound,said adapter plate comprising in combination:
- a generally planar plate body having a central opening aligned with a central hole in a lock mortise,said plate body having four pairs of apertures extending transversely therethrough, including a pair of apertures positioned along each of a first set of lines running horizontally, respectively, and vertically, respectively, across said central opening, and a pair of apertures positioned along each of a second set of perpendicular lines passing across said central opening, said second set of lines being oriented 45 degrees arcuately from said first set of lines,said pair of apertures extending through said lock mortise being alignable with at least one respective pair of said plurality of pairs of apertures through said plate body, a pair of connector means for extending through respective ones of said apertures through said plate body and respective ones of said pair of apertures through said lock mortise for retaining same together, and mounting means on said plate body for mounting a push/pull handle type door lock assembly thereon.
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Abstract
Method and apparatus for mounting a push/pull handle on a latch mechanism is disclosed. Recently, it has become desirable for large medical service facilities, such as hospitals, to change their door latch mechanisms from rotatable lever handles to push/pull handles. The apparatus comprises a pair of mating adapter plates mountable on either side of a door outwardly adjacent a mortise lock presently mounted in the door. The adapter plates include a plurality of pairs of aligned apertures, each of the several pairs of which are adapted to align with a pair of apertures which differing lock manufacturers position in differing radial and arcuate positions with respect to a mortise operating key. The adapter plates fasten through the mortise to the respective door sides and allow push/pull type handle assemblies to be mounted on the adapter plates so as to be operatively connected through the mortise operating key. In the method, the rotatable door handles are removed from the door and latch mechanism, the adapter plates are mounted on the sides of the door outwardly adjacent the mortise. The push/pull handle assemblies are then mountable on the adapter plates and operable through the mortise operating key.
39 Citations
10 Claims
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1. An adapter plate for mounting a push/pull handle type door lock assembly on a door having one of several differing lock mortises positioned thereon, wherein said lock mortise is retained between a first and a second side surface of a door, said lock mortise including a central hole therethrough for mounting a mortise operating key therein, and a pair of apertures on opposite sides of said central hole at predetermined radial distances therefrom and predetermined arcuate positions therearound,
said adapter plate comprising in combination: -
a generally planar plate body having a central opening aligned with a central hole in a lock mortise, said plate body having four pairs of apertures extending transversely therethrough, including a pair of apertures positioned along each of a first set of lines running horizontally, respectively, and vertically, respectively, across said central opening, and a pair of apertures positioned along each of a second set of perpendicular lines passing across said central opening, said second set of lines being oriented 45 degrees arcuately from said first set of lines, said pair of apertures extending through said lock mortise being alignable with at least one respective pair of said plurality of pairs of apertures through said plate body, a pair of connector means for extending through respective ones of said apertures through said plate body and respective ones of said pair of apertures through said lock mortise for retaining same together, and mounting means on said plate body for mounting a push/pull handle type door lock assembly thereon. - View Dependent Claims (2, 3)
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4. A pair of adapter plates for mounting a pair of push/pull handle type door lock assemblies on a door having one of several differing lock mortises positioned thereon, wherein said lock mortise is retained between a first and a second side surface of said door, said lock mortise including a central hole therethrough for mounting a mortise operating key therein, and a pair of apertures through said lock mortise on opposite sides of said central hole at predetermined radial distances therefrom and predetermined arcuate positions therearound,
said pair of adapter plates comprising in combination: -
a pair of planar plate bodies, each having a central opening alignable with a central hole in said lock mortise, said plate bodies having a plurality of aligned pairs of apertures extending transversely therethrough, a pair of apertures extending through said lock mortise being alignable with at least one respective pair of said plurality of aligned pairs of apertures through each of said plate bodies, a pair of connector means for extending through respective ones of said aligned pairs of apertures through said pair of adapter plates and respective ones of a pair of apertures through said lock mortise for retaining same together, and mounting means on each of said plate bodies for mounting a push/pull handle type door lock assembly thereon. - View Dependent Claims (5, 6, 7, 8, 9)
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10. The method of adapting a door latch mechanism including rotatable type handles to receive push/pull type handle assemblies, where said latch mechanism has a mortise including a central hole transversely therethrough including a mortise operating key positioned therein retained between first and second side panels of a door, and said rotatable type handles are mounted on said mortise key, said method comprising the steps of:
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removing the rotatable type handles from said latch mechanism, positioning an adapter plate on each of first and second panels of said door, each said adapter plate having a planar body including a plurality of aligned pairs of apertures extending transversely therethrough, a pair of apertures extending through a lock mortise being alignable with at least one respective pair of said plurality of aligned pairs of apertures through each of said plate bodies, securing said adapter plates against said first and second door side panels by extending a pair of connector means through respective ones of said aligned pairs of apertures through said pair of adapter plates and respective ones of a pair of apertures through said lock mortise, and mounting a push/pull handle type door lock assembly on each said adapter plate with said push/pull handle in operative communication with said key.
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Specification