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. 12, 1981
Filed:
Mar. 19, 1979
Jean-Marie Periot, Isle d'Espagnac, FR;
La Telemecanique Electrique, , FR;
Abstract
A proximity detector comprises a parallel oscillatory circuit the inductance of which is influenced by the metallic element of which it is desired to ascertain the distance, this oscillatory circuit forming part of an oscillator. The oscillator is fed with constant current; current is injected into the oscillatory circuit through a negligibly small resistance; and the output signal is taken off at the output terminals of the oscillator; the device is used to provide an analog signal which is a linear function of distance, in order to classify articles or to measure their speed of approach.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile