Double pendulum clock
US4613236A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1984 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Aug 3, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B45/0053
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.