Fire detection and observation system
First Claim
1. A fire observation system capable of detecting the break of a fire at a place and searching the development of fire at the place and at an area surrounding the place, said system comprisinga central receiving device includinga means having three output stages and forming detection mode changing signals so as to substantially feed three kinds of output, said three output stages comprising a first output stage for feeding first detection mode changing signals to detect an extent of relatively small quantity of matter, a middle output stage for feeding middle detection mode changing signals to detect an extent of reference quantity of matter, and a second output stage for feeding second detection mode changing signals to detect an extent of relatively large quantity of matter,a plurality of AND means having at least two input terminals and an output terminal, and feeding the values of impressed detection mode changing signals by impressing the output of detection mode change signal forming means to one of input terminals and applying a signal to the remaining input terminal, anda display means having the output values of AND means applied thereto and displayed therein;
- anda plurality of remote fire detectors includinga plurality of fire detecting means for detecting a matter and feeding an electrical signal corresponding to the quantity of matter detected,fire signal output means equal in number to said fire detecting means and to which the electrical signals of fire detecting means and the detection mode changing signals are impressed to feed controlled outputs under the output requirement determined by these electrical signals and detection mode changing signals, andintrinsic signal feeding means receiving the outputs of fire signal output means to form an intrinsic signal allotted to each of fire detecting means and supplying the intrinsic signal to the remaining input terminal of AND means corresponding to the fire detecting means.
1 Assignment
0 Petitions
Accused Products
Abstract
Fire observation system comprises a central receiving device and detectors, said central receiving device being provided with a remotely searching means for generating detection mode changing signals to continuously change the quantity of detection from a small value to a large one by means of electrical output units, which are connected to the detectors and can feed an output corresponding to the quantity of detection detected by each of detectors, and each of detectors being provided with an intrinsic signal feeding means for causing each of detectors to receive the detection mode changing signal and feed to the central receiving device the quantity of detection detected by the detector at the place where a fire is developing. Said fire observation system is intended to observe the condition of area surrounding a place where a fire is broken and search the development of fire at the place, after the break of fire is warned by detecting a predetermined reference value of a matter such as smoke, temperature and light.
-
Citations
5 Claims
-
1. A fire observation system capable of detecting the break of a fire at a place and searching the development of fire at the place and at an area surrounding the place, said system comprising
a central receiving device including a means having three output stages and forming detection mode changing signals so as to substantially feed three kinds of output, said three output stages comprising a first output stage for feeding first detection mode changing signals to detect an extent of relatively small quantity of matter, a middle output stage for feeding middle detection mode changing signals to detect an extent of reference quantity of matter, and a second output stage for feeding second detection mode changing signals to detect an extent of relatively large quantity of matter, a plurality of AND means having at least two input terminals and an output terminal, and feeding the values of impressed detection mode changing signals by impressing the output of detection mode change signal forming means to one of input terminals and applying a signal to the remaining input terminal, and a display means having the output values of AND means applied thereto and displayed therein; - and
a plurality of remote fire detectors including a plurality of fire detecting means for detecting a matter and feeding an electrical signal corresponding to the quantity of matter detected, fire signal output means equal in number to said fire detecting means and to which the electrical signals of fire detecting means and the detection mode changing signals are impressed to feed controlled outputs under the output requirement determined by these electrical signals and detection mode changing signals, and intrinsic signal feeding means receiving the outputs of fire signal output means to form an intrinsic signal allotted to each of fire detecting means and supplying the intrinsic signal to the remaining input terminal of AND means corresponding to the fire detecting means. - View Dependent Claims (2, 3, 4, 5)
- and
Specification