Guard apparatus

Details Guard apparatus Guard apparatus

1981-02-12

1982-10-26

Little, Willis

Electricity: circuit makers and breakers

Electric switch details

Actuators

200153T, 200332, 200335, 200153LB, H01H 920, H01H 320

Patent

active

043563694

ABSTRACT:
A guard apparatus for production machines having hazardous work areas in which injury to the machine operator can occur, in which a guard rod is disposed around the perimeter of the hazardous work area and is attached on one end to an emergency circuit activation mechanism connected by an electric circuit to the emergency stop circuitry of the machine. If the guard rod is deflected either upwardly or downwardly, a switch in the activation mechanism is tripped, causing the emergency circuitry of the machine to go into an emergency off condition, thereby stopping the machine. A second emergency circuit activation mechanism can be connected to the other end of the guard rod to provide a back-up for the operation of the guard apparatus if the first switch fails.

REFERENCES:
patent: 3156134 (1964-11-01), Forrester, Jr.
patent: 3210507 (1965-10-01), Kadisevskis et al.
patent: 3248508 (1966-04-01), Pastorel
patent: 4154995 (1979-05-01), Kantarian et al.
patent: 4181827 (1980-01-01), Dieprueen
patent: 4215257 (1980-07-01), Repplinger

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