Accession Number : AD0165105

Title :   Solid State Instrument System for Digital Counting and Continuously Indicating Count Results.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Delay,Dennis G. ; Parsons,Sherman R. ; Sterlacci,Robert A.

Report Date : 21 AUG 1973

Pagination or Media Count : 14

Abstract : The patent describes a digital solid state engine RPM sensing and indicating system for multi-engine aircraft, the RPM indications made simultaneously in the form of side-by-side bar graphs and side-by-side numeric displays for each engine showing RPM as a percentage of rated RPM, the displays being formed by light-emitting diodes and the system arranged such that the bar graphs indicate changes at each 5 percent of noted RPM below 70 percent and at 1 percent above 70 percent. Special current limiting and cooling features are provided to handle the current requirements of the diodes and power supply.

Descriptors :   *Counting, *Patents, Digital systems, Counting methods, Rotation, Electronic equipment, Solid state electronics, Aircraft engines, Indicating instruments, Light emitting diodes

Subject Categories : Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE