Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific quantity comparison means
Patent
1979-08-02
1981-09-22
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific quantity comparison means
361 93, 361187, 340661, 340664, 307360, H02H 326
Patent
active
042913560
ABSTRACT:
The disclosure herein describes an apparatus for analyzing a physical quantity, such as current, and for providing an indication of this quantity to an actuating element, for example a relay; a value of the physical quantity is compared to two preadjusted reference points and, as a result of this comparison, the actuating element is either energized, de-energized or remains unchanged; the two reference points are entirely independent from one another and either one can be made greater than the other; a particular application for this invention is for actuating a current relay.
REFERENCES:
patent: 3316423 (1967-04-01), Hull
patent: 3364470 (1968-01-01), Thompson
patent: 3582665 (1971-06-01), Prozeller
patent: 3787735 (1974-01-01), DeWitte et al.
patent: 3851259 (1974-11-01), Porawski
patent: 4006387 (1977-02-01), Hudak
patent: 4157509 (1979-06-01), Zielinski
H.O.P. CONSULAB Inc.
Salce Patrick R.
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