Pulse generating circuit means for depth sounder alarm and trans

Details Pulse generating circuit means for depth sounder alarm and trans Pulse generating circuit means for depth sounder alarm and trans

1977-12-29

1980-01-15

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

G01S 968, G01S 756

Patent

active

041841425

ABSTRACT:
Circuit means for keying the transmitter of a flasher type depth sounder when the flasher arm motor is off. An alarm circuit is included in the depth sounder which sounds an alarm if the vessel moves away from a preset depth. When the flasher arm motor is on, a pulse is supplied by a magnet on the flasher arm passing over a pickup coil in the circuit. When the flasher arm motor is off, the pulse generating circuit is designed to provide a transmitter keying signal as well as to reset the alarm.

REFERENCES:
patent: 3528053 (1970-09-01), Rubin
patent: 3624596 (1971-11-01), Dickenson et al.
patent: 3733582 (1973-05-01), Eck et al.

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