Remote speedometer-tachometer

Details Remote speedometer-tachometer Remote speedometer-tachometer

1977-11-11

1978-11-21

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

73506, 324160, 340 3D, G01P 342, G01S 966

Patent

active

041260457

ABSTRACT:
A remote speedometer-tachometer for the measurement of the rpm's of an engine and the speed of the craft containing the engine is provided, having first and second adjustable voltages which are related to the pitch of the engine with the sound moving toward and away from an observer. A multiplier is provided for modulating the first voltage by the second voltage and applying the output therefrom to an oscillator for controlling the frequency of the oscillator. An output transducer means is coupled to the oscillator, making it possible for the observer by adjusting the first and second voltages to match the output of the transducer with that of the sound from the engine, the settings of said first and second voltages being calibrated to provide the speed of the craft in which the engine is mounted and/or rpm measurement for the engine.

REFERENCES:
patent: 3182283 (1965-05-01), Ellingson et al.
patent: 3815426 (1974-06-01), Rohner

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