Safety power cutoff for appliances

Details Safety power cutoff for appliances Safety power cutoff for appliances

1980-01-07

1983-01-18

Scott, James R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

174 685, 200 5A, 200 6108, 361 54, 361397, H01H 900, H02H 900

Patent

active

043694799

ABSTRACT:
A safety power cutoff arrangement is disclosed for appliances which utilize membrane panel switches on their control panels causing electrical power to the appliance to be shut off in the event of damage to the control panel. The safety cutoff arrangement comprises a conductive track pattern formed over the outermost circuit sheet forming the membrane switch and interrupter circuitry which requires the continuity of the conductive track pattern to be maintained for electrical power to be continued to be supplied to the appliance circuitry. In the event of damage to the control panel, breaking of any segment of the conductive track pattern results in the interrupt safety circuit cutting off power to the appliance.

REFERENCES:
patent: 3524920 (1970-08-01), Stromquist et al.
patent: 3727105 (1973-04-01), Hochheiser
patent: 3864844 (1975-02-01), Heidtmann
patent: 3876862 (1975-04-01), Newman
patent: 3890719 (1975-06-01), Bray et al.
patent: 3898370 (1975-08-01), Davy et al.
patent: 3911325 (1975-10-01), Plasko
patent: 3936702 (1976-02-01), Plasko
patent: 3942265 (1976-03-01), Sisler
patent: 4145584 (1979-03-01), Otterlei

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