Photoelectric smoke sensor terminal

Details Photoelectric smoke sensor terminal Photoelectric smoke sensor terminal

1986-02-26

1987-01-13

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340505, 340630, G08B 1710, G08B 2600

Patent

active

046366490

ABSTRACT:
A photoelectric smoke sensor terminal has an address signal detector for detecting whether or not an address assigned to the terminal coincides with an address represented by an address signal from a main unit. Only when the coincidence signal is supplied to a switch circuit is a photoelectric smoke sensor turned on. The terminal also has an item data memory for supplying item data (e.g. gas leakage and smoke generation data) so that a plurality of item data signals together with an output signal from the sensor can be transmitted on a single transmission line.

REFERENCES:
patent: 3316410 (1967-01-01), Meili et al.
patent: 4103337 (1978-07-01), Whiteside
patent: 4251769 (1981-02-01), Ewert et al.
patent: 4260981 (1981-04-01), Yamauchi et al.
patent: 4342986 (1982-08-01), Buskirk et al.
patent: 4361832 (1980-11-01), Cole

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