Full automatic electric shock protector apparatus

Claim 1

An electric shock protector apparatus comprising: a. separatable contacts connecting a power source to power lines; b. means for separating said contacts to disconnect said power source from said power lines; c. means for detecting a current passing through said contacts and outputting a voltage representative thereof; d. means for amplifying the output voltage of said means for detecting; e. means for adding the amplified output voltage to a phase-shifted voltage formed from said amplified output voltage after a 180° phase shift; f. means for producing a positive half-cycle electric shock operation signal in response to the output of said means for adding occurring as a result of a human or animal coming into contact with said power lines; g. means for producing a negative half-cycle electric shock operation signal in response to the output of said means for adding occurring as a result of a human or animal coming into contact with said power lines; and h. an OR logic gate having a first input terminal connected to receive said positive half-cycle electric operation signal, a second input terminal connected to receive said negative half-cycle electric shock operation signal and an output terminal connected to said means for separating; whereby when said current is an electric shock current having a frequency higher than a frequency of said power source, said means for separating said contacts is operated to interrupt the power supply.