Accession Number : AD0163722

Title :   Automatic Meter Range Changer.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Strock,Joseph P.

Report Date : 27 OCT 1970

Pagination or Media Count : 5

Abstract : The patent describes an automatic range changer for radio frequency signal meters where the input signal has a high power level shift, the range changer having two low hysteresis direct current level sensors that determine if the meter movement is off scale up or down. The sensed voltage change on one of the sensors is passed through one of two control loops where each control loop comprise a differential amplifier, a unijunction transistor oscillator and feeds into reversible shift register that controls reed relay switching for the radio frequency meter. The reversible shift register will either shift up or down due to whether the meter input signal is off scale up or down from its previous scale.

Descriptors :   (*POWER METERS, RADIOFREQUENCY POWER), (*PATENTS, POWER METERS), AUTOMATIC, SHIFT REGISTERS

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE