Safety switching means for controlling a current consumer

Details Safety switching means for controlling a current consumer Safety switching means for controlling a current consumer

1988-05-04

1989-08-22

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307116, 219251, 219254, H01H 3600, H05B 102, D06F 7526

Patent

active

048598690

ABSTRACT:
The safety switching means comprises a source of radiation (21) which is switched on and off periodically. Only in the event that radiation (22) was detected by the detector (6) when the source of radiation (21) is switched on, it will be checked--with the source of radiation (5) switched off--whether the detector (6) is applied by radiation (22) nonetheless, and, in the event of no radiation being found by the detector (6), the current consumer will be switched on automatically by the switching means, since it is certain that the hand of a user covers the window (4).

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"Elektrowarme im Technischen Ausbau" (elektrowarme international Edition A), 43 (1985) A3, May, p. A 75.

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