Annunciator

Details Annunciator Annunciator

1978-07-12

1981-01-20

Hix, L. T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307116, 340520, 123198DC, H02J 906

Patent

active

042464935

ABSTRACT:
A shut-down and first-out annunciator device comprising sensor switches that change condition when a fault occurs. Logic and display circuits provide a digital readout indicative of a fault condition. Shut-down means are responsive to a shut-down signal produced by the logic circuit and produce a latching signal for the display. A first power supply powers all sections during normal operation and a second power supply powers the display and shut-down circuits after shut-down.

REFERENCES:
patent: 3264613 (1966-08-01), Stolle
patent: 3960011 (1976-01-01), Renz
patent: 4074255 (1978-02-01), Munt
patent: 4136660 (1979-01-01), Palmer

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