Apparatus having a protective circuit

Details Apparatus having a protective circuit Apparatus having a protective circuit

1976-03-08

1977-06-14

Goldberg, Gerald

Electrical transmission or interconnection systems

Personnel safety or limit control features

324 51, 307116, 361 45, H02H 512

Patent

active

040299961

ABSTRACT:
A conductive touch grid or plate incorporated in the handle portion of apparatus such as an appliance performs the on/off function of the appliance as well as sensing the impedance of the operator with respect to either the line or neutral side of an associated AC source. Whenever the sensed impedance indicates a potentially dangerous condition a switching element in series with the line conductor interrupts current flow to the appliance thereby protecting the operator.

REFERENCES:
patent: 3699562 (1972-10-01), Kelly
patent: 3737744 (1975-06-01), Bader, Jr.
patent: 3862432 (1975-01-01), Larson
patent: 3946288 (1976-03-01), Isaksson et al.
patent: 3947734 (1976-03-01), Fyler

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