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:
Apr. 28, 1998
Filed:
Jan. 29, 1997
Chi-hsiang Hung, Taipei, TW;
Other;
Abstract
An improved multistage switch with a small size, convenience in assembly and excellent sensitivity. The multistage switch includes a pedestal and a cover engaged with the pedestal. The pedestal defines a central recess therein and has a boss extending upwardly from a base defining the central recess. An input conductive strip, an output conductive strip and a central conductive strip are respectively disposed within the central recess of the pedestal. An input wire connected with the input conductive strip and an output wire connected with the output conductive strip are respectively received within a pair of channels defined in the pedestal. A diode is received within a cavity defined in the pedestal and connected between the input conductive strip and the central conductive strip. A star wheel combined with a conductive base is rotatably mounted on the boss. The star wheel has six ratchet teeth extending from an outer periphery thereof and the conductive base has four contact pieces abutting the six ratchet teeth and contacting with the input conductive strip, the output conductive strip and the central conductive strip. The cover has a knob mounted thereon. The knob has a driving piece mounted therein to drive the star wheel and a spring to control the driving piece.