Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Patent
1982-05-10
1984-08-14
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific voltage responsive fault sensor
307130, H02H 324
Patent
active
044660405
ABSTRACT:
A safety device for use with an electric appliance to prevent the appliance from inadvertently being started if the appliance is plugged into an outlet when the on/off switch of the appliance is in its on state. A low level sensing current is applied to the appliance before full operating power is applied to the appliance. Detection of the low level sensing current prevents application of full operating power. If no sensing current is detected, full power is applied and the detector is disabled.
REFERENCES:
patent: 3718839 (1973-02-01), Conti et al.
patent: 3958164 (1976-05-01), Hess
patent: 4086643 (1978-04-01), Jacobs
Barthel Richard C.
Roy Richard D.
Bell Edward L.
Davis David L.
Moose Jr. Harry E.
Smith Robert E.
The Singer Company
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