Safety switch assembly

Details Safety switch assembly Safety switch assembly

1995-01-30

1996-12-17

Walczak, David J.

Electricity: circuit makers and breakers

Switch activation inhibitor

Removable actuator

200 4307, 200 4311, 200 4313, 200 4316, H01H 2700

Patent

active

055843786

ABSTRACT:
A safety switch assembly as part of a protective screen by which a motor-driven machine is enclosed includes a locking unit for allowing opening of the protective screen for access to the machine only after all moving motor parts are at a standstill, and a plunger which actuates an electric switch for cutting the electric supply to the machine. The plunger is linked to a control member which is moved by the plunger in response to a key insertable into a housing by which the safety switch assembly is fully enclosed. The locking unit includes a locking lever which is actuated by an electromagnetically actuatable locking mechanism to engage and immobilize the control member with the electric switch being actuated by the control member.

REFERENCES:
patent: 4454392 (1984-06-01), Rapp et al.
patent: 4524251 (1985-06-01), Schulz
patent: 4904829 (1990-02-01), Berthaud et al.

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