US 4,227,577 AGranted

Fire-extinguishing system

AssigneeSecurity Patrols Co., Ltd.

InventorMakoto Iida

Life of this patent

Estimating the term…

Loading patent…

Abstract

A fire extinguishing system coupled with a guarding system for the protecting same region as covered by the fire extinguishing system, and provided with at least one intrusion sensor arranged at desired locations in the region. The fire-extinguishing system is provided with at least one fire sensor arranged in the region and at least one fire extinguishing device for extinguishing a fire, and is connected to the guarding system by a warning signal transmission device provided with a logic circuit for identifying three different conditions based upon whether the fire sensor(s) detects a breakout of a fire or not and whether the intrusion sensor(s) detects an intruder or not. The above-mentioned fire extinguishing system can be further coupled with a switching device for identifying conditions with regard to whether the fire extinguishing system and the guarding system are intentionally set in a self actuatable condition or not.

Claims10

Dependent claims

A fire extinguishing system coupled with a guarding system for protecting the same region, said guarding system including at least one intrusion sensor positioned in said region for providing an abnormal condition signal when a person is in said region, said fire extinguishing system comprising:

(a) at least one fire sensor for monitoring a condition indicative of a fire and for providing a fire signal upon the sensing of the condition;
(b) at least one fire extinguishing device;
(c) at least one manually operable means for operation by a person to activate said fire extinguishing device;
and
(d) logic conduit means coupled to said at least one intrusion sensor, said at least one fire sensor, and said at least one manually operable means wherein said logic circuit means:
(i) provides an actuation signal to said at least one fire extinguishing device when at least one of said at least one fire sensor detects a fire condition in said protected region and at least one of said at least one intrusion sensor does not detect an abnormal condition;
(ii) does not provide an actuation signal to said at least one fire extinguishing device when said at least one fire sensor detects a fire condition in said protected region and said at least one intrusion sensor detects an abnormal condition;
and
(iii) provides an actuation signal to said at least one fire extinguishing device when at least one of said at least one manually operable means are actuated.

6 more elements

Dependencies are inferred from the claim text.