Accession Number : AD0164140

Title :   Knotmeter for Small Craft.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Springston,George B. , Jr. ; Thomas,Samuel L. ; Miller,Fred B.

Report Date : 18 JUL 1972

Pagination or Media Count : 6

Abstract : The patent describes an electronic device whereby a regulated source of power is used to set up a magnetic field in the water around a rodmeter. The output is fed to an amplifier which in turn is connected to a ring demodulator which produces a pulsating D.C. voltage. A capacitor smoothes the D.C. output and feeds it to an integrating digital voltmeter to provide a display which is proportional to the average speed of the craft through the water.

Descriptors :   (*Measuring instruments, *Patents), (*Boats, *Velocity), Electronic equipment, Demodulation, Amplification, Wiring diagrams

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE