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:
Feb. 09, 1993
Filed:
Oct. 11, 1990
Kazufumi Naito, Shiga, JP;
Ishida Scales Mfg. Co., Ltd., Shiga, JP;
Abstract
A load sensor is made of a load-sensitive element made preferably of an aluminum alloy, a bridge circuit with strain gauges made preferably of tantalum nitride and formed on the load-sensitive element, and two operational amplifiers with their non-inversion input terminals connected respectively to the signal output terminals of the bridge circuit and their inversion input terminals connected to each other through a temperature-sensitive resistor having a positive second-order temperature coefficient and a precision resistor. The resistance values of these resistors are adjusted so as to compensate for the first-order and second-order temperature coefficients of the temperature-dependent output from the bridge circuit.