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. 16, 1986
Filed:
Jan. 23, 1985
Noboru Takada, Sakado, JP;
Toko Kabushiki Kaisha, Tokyo, JP;
Abstract
An inductor is configured so as to wind a control coil on one of winding portions of first and second cores and to wind a tuning coil on the other winding portion to insert the second core into a hollow portion provided inside the first core, thereafter accommodating the first and second cores thus assembled into a pot-shaped core, wherein both winding portions of the first and second cores are arranged in parallel with each other and the winding portion of the first core is arranged perpendicular to a bottom surface of the pot-shaped third core. The control coil and the tuning coil are arranged so that their magnetic paths overlap with each other at the winding portion of the second core, thereby to control a current flowing through the control coil when energized to vary effective permeability of the core on which the tuning coil is wound, thus producing changes in inductance.