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:
Dec. 01, 1987
Filed:
Feb. 24, 1987
Itsuki Bahn, Tokyo, JP;
Hideo Okada, Tokyo, JP;
Secoh Geiken Inc., Tokyo, JP;
Abstract
A rotation detecting apparatus for a rotary machine such as a DC motor, the apparatus including a magnet having a plurality of magnetic poles which rotates along with a rotary shaft of a rotary machine, electromagnetic conversion elements disposed in the magnetic field of the magnet, inductance elements disposed in the magnetic field, the inductance elements being spaced with a predetermined interval from the electromagnetic conversion elements, and an electric circuit for obtaining a voltage proportional to the number of rotations of the rotary machine, signals in proportion to the output voltages of the electromagnetic conversion elements and inductance elements being used as input signals to the electric circuit.