Adjustable drill guide for door handles and locks

摘要

A drill guide apparatus for enabling the accurate drilling of holes in a door for the installation of a door handle assembly or lock comprises a generally U-shaped member sized to fit around the edge of a conventional door into which holes are to be drilled for the installation of the door handle assembly or lock. A C-type clamp is included for rigidly clamping the U-shaped member to the edge of said door in the region to be drilled. A drill bushing is installed through a region of the U-shaped member in a location enabling, when the apparatus is clamped to the edge of the door, the guiding a drill for drilling a hole into the edge of the door. A plurality of side plates is provided, each of which has a plurality of drill guide apertures or bushings arranged in relative locations for guiding the drilling of holes through the door for the installation of a particular type of door handle assembly or lock. Any one of the side plates is detachably fastened to one leg of the U-shaped member so that when apparatus is clamped onto the edge of the door, the drill guide apertures or drill bushings of the attached side plate are in such a positional relationship with the drill guide bushing in the U-shaped member that the drilling of holes through the drill bushing in U-shaped member and the drill guide apertures or bushings in the side plate into or through the door will be properly located for the subsequent installation the door handle assembly or lock.