Communications: electrical – Condition responsive indicating system – Specified housing
Patent
1989-12-05
1991-02-05
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specified housing
200 617, 335205, G08B 2300
Patent
active
049908987
ABSTRACT:
A housing for a surface-mount magnet and magnetically sensitive switch unit pair for use in an intrusion detection device. The switch and magnet units include a generally cylindrical housing member formed with a hollow interior cavity, which contains the switch or magnet. The exterior surface of the housing member is threaded and has an end cap formed to receive a screw driver. The units are installed by screwing the housing member directly into the supporting structure. The housing member of the switch unit is further formed with a laterally projecting positioning surface for postioning the switch unit against a surface of the door or window assembly and determining the depth to which the unit is inserted. The end portion or cap of the housing member is formed to provide a passageway from the interior cavity of the housing member to the exterior of the end cap, and a pair of wires from the switch pass through the passageway and emerge from the end cap at a position to be mounted on the surface of the door or window assembly when the switch unit is in its mounted configuration. In a corresponding magnet unit the magnet may protrude into the end cap beyond the positioning surface so that it is offset from the position of the switch in the corresponding switch unit. A pair with such an offset may be used to compensate, at least partially, for mounting on uneven surfaces.
REFERENCES:
patent: 4148001 (1979-04-01), Gwozdz
patent: 4700163 (1987-10-01), Wolfe, Jr.
Negash Kinfe-Michael
Orsino Joseph A.
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