Speed Measuring Apparatus.

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Abstract:

A speed measuring apparatus is provided for indicating a percentage of nominal 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. Author

Author(s):
Coffman, Kenneth L.
Author Organization(s):
DEPARTMENT OF THE NAVY WASHINGTON DC
Descriptive Note:
Patent Application,
Pagination:
0010

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Availability: This Government-owned Invention Available For U.s. Licensing And, Possibly, For Foreign Licensing. Copy Of Application Available Ntis.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-265 475
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Patent applications, *Counters, Rotation, Analog to digital converters, Inlet guide vanes, Jet engines, Velocity, Acceleration, Deceleration, Time intervals, Measuring instruments, Square waves, Display systems, Digital systems, Comparators
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Jet and Gas Turbine Engines
Keyword(s):
Speed indicators
Report Date:
1981 May 20