Patent · US Expired

Pulse generating circuit means for depth sounder alarm and transmitter

US4184142A · kind A · utility

1Cited by
3References
4Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 29, 1977
Grant dateJan 15, 1980
Priority date—
Expiry dateDec 29, 1997

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01S15/08
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.