The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1977
Filed:
Feb. 05, 1976
Max A Schaffer, Fairfield, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
The measurement bridge of a fluidic angular rate sensor in which a pair of temperature sensitive resistive elements are differentially cooled by a jet of fluid, the direction of which lags the position of the resistive elements when the rate sensor is rotated in the plane of sensitivity, is driven by a constant voltage source through resistances substantially equal to the rate sensing resistive elements so that as the resistive elements increase in resistance with temperature, the voltage also increases, so the power consumption and therefore the heat generated in the resistive elements remains constant, thereby tending to maintain a constant temperature differential of the resistive elements above the ambient, and in turn reducing changes in thermally-induced mechanical stress and resulting motion; further, lack of tracking between the two resistive sensing elements over wide temperature ranges is compensated by coupling some of the resultant temperature-dependent voltage to a bridge node to compensate for the temperature-dependent mismatch, said voltage being nulled at normal temperature by coupling of fixed voltage of opposite polarity to the same node.