Alarm system with remote module and associated alarm

Details Alarm system with remote module and associated alarm Alarm system with remote module and associated alarm

1992-11-25

1995-04-11

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

With particular system function

340505, 340636, G08B 2100

Patent

active

054062543

ABSTRACT:
An alarm system has a controller which communicates over a conductive path with a remote module. An indicating device, such as an alarm bell, strobe light, audible horn or other device is coupled to the remote module and activated when a control signal is received from the controller. A rechargeable battery is provided in or adjacent the remote module, and acts as a reservoir for the power to energize the indicating device upon connection. The remote module receives charging current over the conductive path from the controller, and this current is very low, substantially less than the current level required to energize the bell, horn, or strobe. A constant power dc-to-dc converter is provided to charge the battery at the appropriate rate, while drawing a substantially lesser amount of power from the controller. Both the rechargeable battery and the indicating device are supervised, and any malfunction reported to the controller.

REFERENCES:
patent: 4394655 (1983-07-01), Wynne et al.
patent: 4463352 (1984-07-01), Forbes et al.
patent: 4785285 (1988-11-01), Teich et al.
patent: 4796025 (1989-01-01), Farley et al.
patent: 4916432 (1990-04-01), Tice et al.
patent: 5138562 (1992-08-01), Shaw et al.
patent: 5194846 (1993-03-01), Lee et al.

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