Electricity: measuring and testing – Electrical speed measuring – With acceleration measuring means
Patent
1981-05-20
1982-07-27
Krawczewicz, Stanley T.
Electricity: measuring and testing
Electrical speed measuring
With acceleration measuring means
324166, 73489, 73514, 364566, G01P 342, G01P 1500
Patent
active
043419968
ABSTRACT:
A speed measuring apparatus is provided for indicating a percentage of noal full speed RPM of a jet engine and also for indicating time required for accelerating and decelerating the engine. A generator output is converted to a square wave and a time interval measurement is made between zero crossings of the square wave. The square wave controls the starting and stopping of a time period counter and measured time is converted to percent RPM which is displayed on a digital incandescent display. Similar time periods are measured when the engine is advanced from idle to full power, and also when the engine is retarded from full power to idle.
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Krawczewicz Stanley T.
The United States of America as represented by the Secretary of
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