Communications: electrical – Systems – Call station
Patent
1975-07-14
1976-12-21
Caldwell, John W.
Communications: electrical
Systems
Call station
340 52H, 200 52A, 200 6145R, 200 6152, G08B 2100, B60Q 100
Patent
active
039991784
ABSTRACT:
Disclosed is a boat alarm system including a sensor that provides a sensor output in response to a predetermined change in its orientation, a timer for providing an alarm signal in response to a one-quarter to one second period of uninterrupted sensor output and a means for generating an alarm in response to the alarm signal. The detected change in orientation is produced by an uninterrupted list of the boat in any direction for the required one-quarter to one second period. Also provided is an auxiliary timer that prevents the generation of the alarm in response to changes in the sensor's orientation that occur at less than a predetermined rate. Finally, a limit mechanism insures the generation of an alarm when such a condition reaches an extent that threatens swamping of the boat.
REFERENCES:
patent: 3564496 (1971-02-01), Brooks et al.
patent: 3659265 (1972-04-01), Eversull
patent: 3715533 (1973-02-01), Seaton
patent: 3761653 (1973-09-01), Eranosian
patent: 3763484 (1973-10-01), Byers
patent: 3798594 (1974-03-01), Funk
Caldwell John W.
Toupal John E.
Wannisky William M.
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