Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1998-02-10
2000-06-27
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
With particular system function
34082506, 34082507, 34082554, G08B 2900
Patent
active
060811927
ABSTRACT:
An object of the present invention is to provide a fire alarm system which is adaptable to form a large-size fire alarm system and is capable of causing a receiving portion to quickly detect fire information from a terminal unit, or the like, if the terminal unit has been operated. In a fire alarm system in which terminal units, such as fire detectors, are connected to the receiving portion, an address is given to the terminal unit to allow detection of terminal units that have a status change, wherein system polling or the like for a specific terminal unit, such as a transmitter, among the terminal units is performed prior to performing system polling of other terminal units.
REFERENCES:
patent: 4610012 (1986-09-01), Terada et al.
patent: 4996518 (1991-02-01), Takahashi et al.
patent: 5017905 (1991-05-01), Yuchi
patent: 5227778 (1993-07-01), Starefoss
patent: 5302941 (1994-04-01), Berube
Hishino Kouichi
Takahashi Kaoru
Takahashi Keiichi
Usami Yukihiko
Hofsass Jeffery A.
Nohmi Bosai Ltd.
Pope Daryl C.
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