Key operable safety switch

Details Key operable safety switch Key operable safety switch

1995-11-15

1997-03-04

Meyers, Steven N.

Locks

Operating mechanism

Key

70386, 70387, E05B 3504

Patent

active

056068816

ABSTRACT:
A key operable electrical safety switch includes a housing and a switch operator that is operated by an actuator. A slot in the housing receives the actuator. A plurality of pin stacks, the stacks having axes that are parallel and perpendicular to the slot, are spring biased to extend into the slot. At least one of the pins engages the actuator to lock it in a fixed position relative to the housing. The actuator is released from the locked position, and displaced a predetermined stroke to actuate the switch operator and thereby change the state of the switch contacts, by a key. The key has a coded pattern of pin receiving holes corresponding to the locking pins to align the pins and release the actuator. The pins are correspondingly codeable.

REFERENCES:
patent: 4149394 (1979-04-01), Sornes
patent: 4452059 (1984-06-01), Sornes
patent: 5025647 (1991-06-01), Muus
patent: 5343724 (1994-09-01), Sornes
patent: 5355701 (1994-10-01), Tobias

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