Remote safety switch

Details Remote safety switch Remote safety switch

1986-11-24

1989-06-13

Roskoski, Bernard

Electrical transmission or interconnection systems

Switching systems

Switch actuation

192129A, 200 865, 307115, H01H 314

Patent

active

048395331

ABSTRACT:
A foot operated safety switch, preferably including an electronic control reset circuit, is connected between a source of electrical current and the power cord of an electrically operated device having an on/off switch on it. The safety switch operates as an off-only device and cannot be used to turn on the device once it has been operated to turn the device off. To reoperate the device, the on/off switch on the device first must be turned off and then turned backon. This reset necessity also is incorporated into the system to prevent the device from being automatically turned back on after it has been turned off by a power failure.

REFERENCES:
patent: 2111311 (1938-03-01), Child
patent: 2313166 (1943-03-01), Nicholas
patent: 2944120 (1960-07-01), Ruben
patent: 4259567 (1981-03-01), Moore et al.
patent: 4283612 (1981-08-01), Richards
patent: 4359615 (1982-11-01), Meyerhoefer
patent: 4460818 (1984-07-01), Anetsberger
patent: 4487305 (1984-12-01), Wagner
patent: 4535254 (1985-08-01), Khatri

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