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. 26, 1987
Filed:
Nov. 26, 1985
James W Mueller, Duncan, OK (US);
Scott A Berning, Duncan, OK (US);
Halliburton Company, Duncan, OK (US);
Abstract
An angular displacement indicating apparatus includes internal and external magnets disposed so that the external magnet tracks the internal magnet when a shaft to which the internal magnet is connected rotates. The external magnet is connected to a rotary variable differential transformer, for example, so that the external magnet moves from a null position in response to rotation of the internal shaft thereby causing the transformer to generate an electrical signal proportional to the angle of rotation of the shaft. Embodiments of the invention include external connecting mechanisms which can be moved to physically indicate the actual angle of deflection of the internal shaft.