Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1975-08-15
1977-03-01
Hohauser, Herman J.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
318483, 307 10R, H02G 300
Patent
active
040103838
ABSTRACT:
The arrangement includes at least one upper and one lower cooperating sensor element, each comprised of a naked electrically conductive portion adjoining the corresponding portion of the other and together defining an interelectrode gap. The naked portions are exposed to precipitation. The naked conductive portion of the lower sensor element is comprised of upwardly projecting teeth having pointed ends closely adjoining the naked conductive portion of the upper sensor element. Water droplets occupying the interelectrode gap will tend not to cling to the electrically conductive portion of the lower sensor element because of the pointed configuration of the ends of the upwardly projecting teeth. A circuit is connected to the sensor elements and detects the existence of precipitation by detecting the interelectrode gap resistance changes which result when the interelectrode gap is occupied by water droplets, and the like, and in response to such detection generates a control signal for the windshield wiper motor and/or the windshield washer motor.
REFERENCES:
patent: 3555289 (1971-01-01), Sobkow
Hohauser Herman J.
Striker Michael J.
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