Control circuit for an electrical device

Details Control circuit for an electrical device Control circuit for an electrical device

1977-03-14

1978-10-31

Schaefer, Robert K.

Electrical transmission or interconnection systems

Personnel safety or limit control features

12830313, 12830314, A61B 1736

Patent

active

041236734

ABSTRACT:
A control circuit for an electrical device which includes a switch that is electrically isolated from other components. The switch is connected in series with a photovoltaic cell and relay means. The photovoltaic cell is illuminated so that closing of contacts of the switch causes actuation of the relay means. The relay means is connected to actuate the electrical device. Voltage at the switch is limited by the voltage produced by the photovoltaic cell.

REFERENCES:
patent: 3227929 (1966-01-01), McCreight
patent: 3601126 (1971-08-01), Estes
patent: 3952748 (1976-04-01), Kaliher et al.

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