Plunger operated magnetic contact switch assembly
First Claim
1. A plunger operated electrical switch assembly, comprising:
- (a) a magnetic reed switch;
(b) means for holding said magnetic reed switch in a predetermined position;
(c) a plunger;
(d) a plunger guide located adjacent said means for holding said magnetic reed switch, said plunger guide permitting reciprocal movement of said plunger alongside and longitudinally of said magnetic reed switch, between a predetermined extended position and a depressed position;
(e) an elongate actuating magnet; and
(f) cavity means defined in said plunger for holding said actuating magnet in one of a plurality of predetermined positions relative to said magnetic reed switch when said plunger is in said extended position, said cavity means including a plurality of intersecting similarly oriented magnet receiving cavities, each including means for positively establishing a different predetermined location for said actuating magnet within said plunger.
2 Assignments
0 Petitions
Accused Products
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.
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Citations
10 Claims
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1. A plunger operated electrical switch assembly, comprising:
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(a) a magnetic reed switch; (b) means for holding said magnetic reed switch in a predetermined position; (c) a plunger; (d) a plunger guide located adjacent said means for holding said magnetic reed switch, said plunger guide permitting reciprocal movement of said plunger alongside and longitudinally of said magnetic reed switch, between a predetermined extended position and a depressed position; (e) an elongate actuating magnet; and (f) cavity means defined in said plunger for holding said actuating magnet in one of a plurality of predetermined positions relative to said magnetic reed switch when said plunger is in said extended position, said cavity means including a plurality of intersecting similarly oriented magnet receiving cavities, each including means for positively establishing a different predetermined location for said actuating magnet within said plunger. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10)
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6. A plunger operated electrical switch assembly, comprising:
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(a) a magnetic reed switch; (b) means for holding said magnetic reed switch in a predetermined location; (c) an elongate actuating magnet; (d) a plunger, including cavity means for receiving said actuating magnet in a selected one of a plurality of positions within said plunger, said actuating magnet being located in one of said positions within said plunger; (e) a plunger guide, said plunger guide being located adjacent said means for holding said magnetic reed switch and permitting reciprocal movement of said plunger alongside said magnetic reed switch and longitudinally thereof between an extended position and a depressed position; and (f) a housing including said means for holding said magnetic reed switch and said plunger guide, said housing comprising a barrel and a cap, said plunger guide being included in said barrel, and said switch assembly further comprising radially movable roller means retained by said cap and located in contact with said plunger, for retaining said plunger in said plunger guide and urging said plunger toward said depressed position in response to pressure against said roller means, a portion of said roller means protruding radially outwardly through said cap.
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Specification