Interfacing attachment for remote mechanical fire alarms

Details Interfacing attachment for remote mechanical fire alarms Interfacing attachment for remote mechanical fire alarms

1980-11-28

1983-06-21

Caldwell, Sr., John W.

Communications: electrical

Systems

Signal box type

335205, 340307, 340539, G08B 2500, G08B 108

Patent

active

043896359

ABSTRACT:
An attachment which converts a single station, spring powered, temperature sensitive, fire alarm protection device into a remote signalling heat detector for a central fire alarm system, without affecting the internal apparatus of the alarm device or the environmental protection of such internal apparatus. The attachment includes a pivotally mounted member having a shield arm interposed between a magnet and a reed switch, and a lever arm which interacts with a winding key on the alarm device to move the shield arm from between the magnet and reed switch when the alarm is actuated. This movement of the shield arm permits the magnetic force of the magnet to activate the reed switch. The reed switch is connected by wire or radio link to a central monitor. Actuation of the reed switch, in response to actuation of the alarm device, produces an alarm signal at the central monitor.

REFERENCES:
patent: 3579159 (1971-05-01), Posey
patent: 3804054 (1974-04-01), Gallagher
patent: 3931785 (1976-01-01), Keeley et al.

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