Fire alarming system

Details Fire alarming system Fire alarming system

1997-03-24

2000-07-18

Pope, Daryl

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 34082508, 3408252, 34082521, 34082552, G08B 2900

Patent

active

060913282

ABSTRACT:
A fire alarming system includes a plurality of terminal devices including fire sensors, transmitters, manual boxs, and/or other devices to be controlled; and a receiving device to which the plurality of terminal devices are connected. A great number of terminal devices with a manual box are connected to the receiving device. When a plurality of manual boxs are activated at the same time, the terminal devices corresponding to the activated manual boxs can be called at the same time without encountering a collision among returning-back signals transmitted from these terminal devices. That is, when a plurality of manual boxs are activated at the same time, the signal of only one of the plurality of activated manual boxs can arrive at the receiving device.

REFERENCES:
patent: 5635904 (1997-06-01), Takahashi et al.

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