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. 16, 2006
Filed:
Apr. 16, 2003
Seiji Toda, Nagaokakyo, JP;
Naomasa Oshie, Moriyama, JP;
Seiji Toda, Nagaokakyo, JP;
Naomasa Oshie, Moriyama, JP;
Levex Corporation, Kyoto, JP;
Abstract
A position sensor is provided comprising a coil () and an electric conductor () or magnetic () both arranged so that the size of their overlapping area (p) is varied as the position of an object to be examined changes, a resistor (), a capacitor (), a comparator () of an inverse output type, and a timing circuit () arranged for uniformly restraining the period (T) of a continuous oscillating motion, herein a displacement of the object to be examined is detected as a change in the time duration (t) which extends from the leading end of the period (T) to a time when the output of the comparator () is turned to a high level as timed with substantially the trailing end of the period (T). The resistance of the resistor () is determined so that a change in the time duration (t) remains minimum when the resistance of the resistor () is varied and when the temperature is at a predetermined degree. As the result, the linearity of the output can be improved over variation of both the temperature and the position.