Bridge circuits

Details Bridge circuits Bridge circuits

1977-07-06

1979-12-04

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Balancing

73360, 324 62, 324 98, G01R 1706, G01R 1700, G01R 2702, G01K 714

Patent

active

041774230

ABSTRACT:
A bridge circuit for measuring or use in a temperature-responsive servo-mechanism. A chain of four or alternatively five resistors is connected between power supply rails, an inner two resistors of the chain being shunted by the track of a potentiometer. A balancing potentiometer is connected directly across the supply rails and has its wiper connected to one side of a balance detector through a high value resistor. The signal to be measured is applied between the chain of resistors and the other side of the balance detector. There is a resistive connection from the wiper of the first-mentioned potentiometer and the resistor chain to the end of the high value resistor nearer the detector. The signal to be measured is derived from a resistance-type or thermo-couple temperature sensor. Reference junction compensation for the latter is described.

REFERENCES:
patent: 1209372 (1916-12-01), Wunsch
patent: 2031050 (1936-02-01), Leeds
patent: 2951211 (1960-08-01), Brashear

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