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:
Sep. 23, 1986
Filed:
Aug. 03, 1984
Norihiko Nakamura, Tokyo, JP;
Rhythm Watch Co., Ltd., Tokyo, JP;
Abstract
A double pendulum clock swingingly hanging and supporting two different pendulums including a first pendulum rod swingingly pivoted on a clock body and connected to a first pendulum, a drive magnet attached to the first pendulum rod, a drive coil provided on the clock body to drive the first pendulum by means of electromagnetic coupling with the drive magnet, a second pendulum rod swingingly pivoted on the clock body and connected to a second pendulum, and linking magnets provided at positions facing both of the first pendulum rod and the second pendulum rod and swinging the second pendulum rod in accordance with the swing of the first pendulum rod by means of mutual magnetic force.