Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1989-05-01
1990-09-11
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
With particular system function
340521, 34082555, G08B 1900
Patent
active
049566342
ABSTRACT:
Improvement to a fire alarm system that enables a city tie line connection to be made selectively. Terminal units at a variety of locations are coupled or connected in separate, independent loops within the system such that serial synchronous power transmission and data communication is effectuated over the individual loops. A master controller at a central location is programmed to recognize that certain terminal units connected in particular loops of the system are in alarm states and to cause a city tie line connection to be made, selectively, whereby a municipal fire department or the like is informed of the particularly critical alarms emanating from those terminal units.
REFERENCES:
patent: 4103337 (1978-07-01), Whiteside
patent: 4225819 (1988-02-01), Sasaki et al.
patent: 4489312 (1984-12-01), Yoshizaki
patent: 4506255 (1985-03-01), Sazaki
patent: 4518952 (1985-05-01), Tanaka et al.
patent: 4525700 (1985-06-01), Kimura et al.
patent: 4550306 (1985-10-01), Kimura
patent: 4581604 (1986-04-01), Kimura et al.
patent: 4623920 (1987-06-01), Ferguson et al.
patent: 4636649 (1987-01-01), Kimura et al.
patent: 4658243 (1987-04-01), Kimura et al.
patent: 4668939 (1987-05-01), Kimura et al.
patent: 4701625 (1987-10-01), Kimura
patent: 4725821 (1988-02-01), Kimura et al.
patent: 4733224 (1988-03-01), Kimura
General Signal Corporation
Hubbard Robert R.
Ohlandt John F.
Orsino Joseph A.
Scutch III Frank M.
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