Annunciator control circuit

Details Annunciator control circuit Annunciator control circuit

1997-07-24

1999-03-02

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340506, 34031001, 307 101, B60Q 100

Patent

active

058776788

ABSTRACT:
An annunciator control circuit adaptable for responding to a plurality of types of fault indicative inputs is provided. The control circuit includes a signal conditioning circuit portion having an input line and an output line. The signal conditioning circuit also includes switch means adjustable for selectively configuring the signal conditioning circuit portion to receive each of the plurality of types of fault indicative inputs at the input line thereof and to provide a conditioned fault indicative output signal in response thereto at the output line. The control circuit further includes a first latching circuit portion connected to the output line of the signal conditioning circuit portion and having a first output line. A first switching transistor of the control circuit includes a base, collector, and emitter, the base connected to the first output line of the first latching circuit portion. In response to receipt of the conditioned fault indicative output signal from the signal conditioning circuit portion, an output at the first output line of the first latching circuit portion latches the first switching transistor in an ON state. When the first switching transistor is connected to an operator output device such as a lamp or horn, the annunciator control circuit can be utilized to convey to an operator the occurrence of some type of fault in a system being monitored.

REFERENCES:
patent: 3641547 (1972-02-01), Reiss et al.

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