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. 14, 1976
Filed:
May. 31, 1974
Shunzo Oka, Hirakata, JA;
Kazuo Oshima, Osaka, JA;
Abstract
A variable resistor is disclosed which may readily attain or reproduce a preset value. A wiper arm or plate is carried by an outer shaft for rotation with a wiper in sliding contact with a resistor so that the resistance value may be continuously varied in a conventional manner. In order to detect the angular position of the outer shaft where a preset value is obtained, a click mechanism is incorporated. A click spring of the click mechanism is fixed to a switching plate carried by an inner shaft fitted into the outer shaft for rotation therewith or independently thereof in case of presetting, and a ball loosely carried at the free end of the click spring is adapted to engage with a recess formed at a predetermined position of a stationary click plate so that the inner shaft may be stopped at a predetermined angular position. To preset, one rotates the outer shaft to a desired resistance value, and then while holding the outer shaft stationary, he rotates only the inner shaft until it is stopped by the click mechanism. After presetting, a preset value is readily reproduced when one rotates both the outer and inner shafts until and they are stopped by the click mechaism. Furthermore, the variable resistor incorporates a switch so arranged that when, and only when the inner shaft is stopped by the click mechanism, the switch is closed to turn on an indicator lamp.