Interlock mechanism for a key operated door switch

Details Interlock mechanism for a key operated door switch Interlock mechanism for a key operated door switch

1995-02-24

1995-12-05

Cuchlinski, Jr,, William A.

Electricity: circuit makers and breakers

Switch activation inhibitor

Removable actuator

200 4301, 200 4302, 70DIG30, H01H 2700

Patent

active

054731275

ABSTRACT:
A key operated door interlock switch is provided with a cam structure having a first cam and a second cam connected together for rotation about a first axis. A key is shaped to have first and second actuator portions that can be moved into a switch housing to engage first and second lobes of the first and second cams. The first and second actuator portions of the key engage the lobes sequentially to rotate the cam mechanism about the first axis. Rotation of the cam mechanism causes a plunger to move linearly relative to the support structure and operate an electrical switch that permits associated equipment, such as machinery to be actuated. The relative lengths of the first and second actuator portions of the key can be selected to match the arcuate displacement of the lobes of the cams relative to the first axis. This flexibility allows the switch to be customized so that only particular keys can actuate particular switches even though their general appearance is similar.

REFERENCES:
patent: 3858018 (1974-12-01), Walley
patent: 4395608 (1983-07-01), Eicker et al.
patent: 4454392 (1984-06-01), Rapp et al.
patent: 4524251 (1985-06-01), Schulz
patent: 4658102 (1987-04-01), Seim et al.
patent: 4695684 (1987-09-01), Bochard et al.
patent: 4904829 (1990-02-01), Berthaud et al.

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