Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1982-11-17
1984-11-27
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340505, 340506, 340511, 340533, 34082505, G08B 1900
Patent
active
044853734
ABSTRACT:
An automatic centralized monitoring security system having a plurality of detectors each capable of detecting and advising a malfunction of any given situation of either a routine or emergency nature and a responder associated in circuit with each detector, the arrangement being such that during normal operation the circuit is in dynamic equilibrium, and that upon a malfunction occurring to influence one or more detectors in the circuit an imbalance is created adapted to give rise to an alarm situation.
REFERENCES:
patent: 2842753 (1958-07-01), Ewen
patent: 3735395 (1973-05-01), Getchell
patent: 4041455 (1977-08-01), Norberg
Crosland Donnie L.
I. E. I (Australia) Proprietary Limited
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