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:
Mar. 29, 1983
Filed:
Mar. 26, 1982
Masaru Itami, Nagano, JP;
Yasue Ashibe, Nagano, JP;
Rhythm Watch Company, Ltd., Tokyo, JP;
Abstract
In a pendulum arrangement of a pendulum clock having a pendulum arm hanging a pendulum disc on one end and being pivotally and swingingly supported at a supporting portion of a base plate, an electromagnet fixed to the base plate and a permanent magnet arranged facingly to the electromagnet and swinging together with the pendulum arm for the purpose of swinging a pendulum by means of electromagnet force of the electromagnet and the permanent magnet, a pendulum arrangement further comprising a slip arm one end of which the permanent magnet is fixed and on the other end of which is loosely engaged with the pendulum arm at a little larger slipping torque than a driving torque which said permanent magnet receives from the electromagnet, and a pair of limit pins fixed on the both side of the swinging region of the slip arm on the base plate, wherein either one of the limit pins touches the slip arm to slip the slip arm away from the pendulum arm and the permanent magnet always swings so that it can center the electromagnet.