Interrogation device

Details Interrogation device Interrogation device

1983-08-10

1986-03-25

Brady, W. J.

Communications: electrical

Land vehicle alarms or indicators

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

179 5R, 340505, 340518, H04M 1104

Patent

active

045785392

ABSTRACT:
An interrogation unit for connecting into an installation via sensing elements connected to sense required information in the installation, said interrogation unit having signal supplying means for supplying signals indicative of the condition of each of various sensors in the installation, and trigger circuit means activatable upon receipt of a request signal to transmit said signals for each of the sensors in turn.

REFERENCES:
patent: 3842206 (1974-10-01), Barsellotti et al.
patent: 3962545 (1976-06-01), Abe
patent: 4085292 (1978-04-01), Leslar et al.
patent: 4162488 (1979-07-01), Silverman et al.
patent: 4241237 (1980-12-01), Paraskevakos et al.

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