Patents Assigned to A-B Electronic Systems Company
  • Pulse generating circuit means for depth sounder alarm and transmitter
    Patent number: 4184142
    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.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: January 15, 1980
    Assignee: A-B Electronic Systems Company
    Inventors: John Burch, Paul W. Wells