Fixture for retrofitting and wiring security alarm door jamb swi

Details Fixture for retrofitting and wiring security alarm door jamb swi Fixture for retrofitting and wiring security alarm door jamb swi

1994-03-07

1996-04-30

Howell, Daniel W.

Gear cutting, milling, or planing

Milling

Means for internal milling

408 79, 408 72B, 408115R, 408241B, 409175, B23B 4902

Patent

active

055119158

ABSTRACT:
An installation method for security switches located in door jambs and connection into security system wiring is provided together with a mounting fixture for simplifying the installation. To avoid wall damage, with cylindrically packaged security switches inserted snugly in a hole drilled part way through a door jamb a few inches from the floor, an installation fixture holding a drill at an angle is inserted into the switch mounting hole for drilling at a desired angle a system wire passageway hole into the switch mounting hole wall to extending downwardly through the floor. Another drill held in the fixture at a different angle permits routing of the mounting hole wall form a wire transit channel axially adjacent to an inserted switch for passing the system wires back to connect with the security switch. Thus, after drilling a switch mounting hole, the fixture is inserted thereinto and a wire passageway hole is drilled at a downwardly slanting angle through the floor for connection thereunder into a security control system. Then the fixture, which comprises a cylindrical barrel that abuts the switch mounting hole with a stud extending from each barrel end for entering the switch mounting hole, is reversed using the other stud for inserting a routing drill at a different angle to rout out a wiring channel from the wire passageway entrance backward to the rear of the security switch.

REFERENCES:
patent: 2193764 (1940-03-01), Joos
patent: 4447176 (1984-05-01), Blough et al.

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