Actuator-controlled keylock switch

Details Actuator-controlled keylock switch Actuator-controlled keylock switch

1988-03-25

1990-02-27

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

200 4304, 200 4307, 200 6162, 200 6167, H01H 928, H01H 2708

Patent

active

049048295

ABSTRACT:
A key attached, for example, to the door of an electrical equipment cubicle is capable of sliding within a passageway so as to cause pivotal displacement of a cam and upward displacement of a push-rod, thus releasing a switch lug. A locking rod forming part of a slide-block which is coupled with the push-rod is capable of moving between a locking position in which an annular channel permits displacement of the key and an unlocking position in which the locking rod is engaged within a key notch. One end of the slide-block projects from the top face of the switching unit head in order to be downwardly displaced by an actuator, whereupon the key can be withdrawn without difficulty or danger.

REFERENCES:
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.
"Immer auf der sicheren Seite", Elektro Anzeiger, No. 9, 1985, by B. Kirschbaum.

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