Alerting process and system of apparatus therefor

Details Alerting process and system of apparatus therefor Alerting process and system of apparatus therefor

1975-09-19

1977-06-21

Safourek, Benedict V.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325466, 343200, H04J 300

Patent

active

040314677

ABSTRACT:
A master control unit is placed for operation at each of several radio stations covering large area zones. A distinct audio triggering frequency is provided for each of several defined smaller zones in the large area zones. On notice from the National Weather Bureau or other appropriate agency, as Sheriff's Office, the operator of the master control unit selectively triggers radio frequency receiver assemblies to automatically connect to disconnected loudspeakers in such radio frequency receiver assemblies in any one small area zone, any combination of such zones, or all zones in its watch area to then automatically cause audible notice of any immediately needed warning affecting only that small area zone or any combination of such smaller area zones.

REFERENCES:
patent: 3387212 (1968-06-01), Kaufman
patent: 3521168 (1970-07-01), Kaiser et al.
patent: 3848193 (1974-11-01), Martin et al.

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