Radio alarm system

Details Radio alarm system Radio alarm system

1984-02-24

1989-09-05

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

With particular coupling link

340531, 42 115, 455 96, G08B 108, H04Q 700

Patent

active

048642770

ABSTRACT:
An alarm system, particularly a radio transmitter alarm system in which an alarm condition causes the propulsion of an alerting radio transmitter to a high altitude, thereby significantly increasing the reliable working distance between a protected location and a staffed, alarm-receiving point.

REFERENCES:
patent: 2519123 (1950-08-01), Dwyer et al.
patent: 2928935 (1960-03-01), Murray
patent: 3038154 (1962-06-01), Zworykin et al.
patent: 3432857 (1969-03-01), Rasmussen et al.
patent: 3906370 (1975-09-01), Apps
patent: 3978410 (1976-08-01), Fletcher et al.
patent: 4232391 (1980-11-01), Zanutti

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