Electricity: magnetically operated switches – magnets – and electr – Permanent magnet-actuated switches
Patent
1980-11-17
1982-06-22
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Permanent magnet-actuated switches
335151, H01H 900
Patent
active
043365183
ABSTRACT:
A switch assembly which has an actuating magnet, held in one of a plurality of intersecting cavities within a reciprocally movable plunger, and a magnetic reed switch located alongside one another within a switch housing. With the actuating magnet in one position in the plunger the magnetic reed switch contacts remain normally open when the plunger is extended. With the actuating magnet in another cavity in the plunger, the magnetic reed switch contacts remain normally closed when the plunger is extended. The switch housing comprises a barrel including a cavity for receiving the magnetic switch and a guide cavity for receiving a plunger spring and guiding the reciprocal movement of the plunger. A cap of the housing retains a cylindrical roller against the plunger, and permits the roller to move reciprocally between an extended position projecting above the outer surface of the cap and a depressed position, moving the plunger and the actuating magnet carried in the plunger to change the state of the magnetic reed switch.
REFERENCES:
patent: 3932718 (1976-01-01), Porat
patent: 4126841 (1978-11-01), Maeho
patent: 4130745 (1978-12-01), Hetzer
Holce Thomas J.
Huckins Charles M.
Harris George
Sentrol, Inc.
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