Safety device for socket which is connected to electrical power

Details Safety device for socket which is connected to electrical power Safety device for socket which is connected to electrical power

1995-07-03

1998-06-02

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Personnel safety or limit control features

361 59, 361170, 307327, H02H 4787

Patent

active

057604991

ABSTRACT:
A safety device includes a comparator circuit includes three resistors arranged in series. An IC has a positive pole coupled to the resistors and has a negative coupled to the positive pole of another IC which has a negative pole coupled to the resistors. A signal output circuit includes a transistor having a base connected to the ICs and having a collector coupled to a relay. The relay includes two common contacts for selectively contacting with two normally closed contacts and two normally open contacts so as to supply electric power to the common contacts when an electric appliance is coupled between the common contacts.

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