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:
Jul. 21, 1981
Filed:
May. 23, 1979
Applicant:
Inventors:
Yoshikazu Takekoshi, Yokohama, JP;
Takeshi Yagisawa, Yokohama, JP;
Assignees:
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Shibaura Engineering Works Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
73761 ; 324209 ;
Abstract
A residual stress measuring apparatus for sensing a magnetic state of an object to measure a residual stress of the object comprises a magnetic sensor for sensing a magnetic state of the object to provide its state in the form of current and voltage, an AC power source for feeding an AC power to the magnetic sensor, a wattmeter for multiplying the current and the voltage supplied from the magnetic sensor to provide a variation of a core loss, and a calculator for converting the variation of the core loss into a residual stress of the object.