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