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:
Aug. 07, 1984
Filed:
Jun. 22, 1982
Arthur Bunce, Cedar Grove, NJ (US);
John E Johanson, deceased, late of Boonton, NJ (US);
Johanson Manufacturing Corporation, Boonton, NJ (US);
Abstract
Apparatus for an adjustable low-loss capacitor, which can withstand the application of high shock forces without a corresponding change in a preselected value of capacitance, is described. This capacitor has two sets of hollow cylindrical electrodes which are coaxially interleaved, with, more particularly, one set attached to a rotor unit and the other to a stator unit, all contained within a housing. The capacitance is varied by longitudinal, i.e., axial, movement of the rotor unit with respect to the stator unit. The rotor unit is threadedly inserted into a bushing. In addition, the rotor unit includes a frictional locking mechanism which comprises a threaded member which is inserted into a hole cut into the rotor unit and oriented substantially parallel to the center axis of the rotor. As this threaded member is turned, one portion of the rotor unit moves, with respect to another portion, in a longitudinal direction substantially parallel to a center axis of the rotor unit. Consequently, the frictional force exerted between individual mating thread surfaces of both the rotor unit and bushing increases. This, in turn, frictionally locks the position of the electrodes on the rotor unit, in any preselected position, relative to that of the electrodes attached to the stator unit.