Communications: electrical – Systems – Signal box type
Patent
1995-03-20
1997-03-04
Hofsass, Jeffery
Communications: electrical
Systems
Signal box type
34028605, 315241S, 307 35, G08B 2500
Patent
active
056083750
ABSTRACT:
An audio/visual alarm system which includes multiple microprocessor-controlled alarm units connected in a common loop to a fire alarm control panel and an interface control circuit. The interface control circuit causes brief interruptions in power to the alarm units which synchronize operation of the alarm units and which can also be used as alarm control signals. The interface control circuit allows for control of both audio and visual alarms using only the single common loop connection between alarm units.
REFERENCES:
patent: 3488558 (1970-01-01), Grafton
patent: 3881130 (1975-04-01), Stiller
patent: 3969720 (1976-07-01), Nishino
patent: 3973168 (1976-08-01), Kearsley
patent: 4068149 (1978-01-01), Wuchinich
patent: 4101880 (1978-07-01), Haus
patent: 4162489 (1979-07-01), Thilo et al.
patent: 4216413 (1980-08-01), Plas
patent: 4389632 (1983-06-01), Seidler
patent: 4449073 (1984-05-01), Mongoven et al.
patent: 4471232 (1984-09-01), Peddie et al.
patent: 4472714 (1984-09-01), Johnson
patent: 4899131 (1990-02-01), Wilk et al.
patent: 4924149 (1990-05-01), Nishida et al.
patent: 4952906 (1990-08-01), Buyak et al.
patent: 5121033 (1992-06-01), Kosich
patent: 5128591 (1992-07-01), Bocan
patent: 5341069 (1994-08-01), Kosich et al.
patent: 5400009 (1995-03-01), Kosich et al.
Hofsass Jeffery
Tweel , Jr. John
Wheelock Inc.
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