Clock having magnetically-levitated pendulum

Details Clock having magnetically-levitated pendulum Clock having magnetically-levitated pendulum

1996-04-15

1997-06-10

Miska, Vit W.

Horology: time measuring systems or devices

Oscillating or reciprocating means

Pendulum type

368223, 40426, 40485, G04B 1702, G09F 1900

Patent

active

056383401

ABSTRACT:
An analog or digital clock having a ferromagnetic pendulum that is magnetically levitated under feeedback-control and that, alternatively, may be (1) driven at a forced oscillation frequency which is decoupled from and asynchronous with the clock's time control element (e.g., a quartz crystal), (2) driven at a forced oscillation frequency which is coupled to and synchronous with the clock's time control element or (3) oscillated at the resonant frequency of the levitated pendulum and this resonant frequency is used as a time control for determining the clock's timing. Such a levitated pendulum clock is useful for both ornamental and educational purposes.

REFERENCES:
patent: 2566221 (1951-08-01), Lovell
patent: 4585282 (1986-04-01), Bosley
patent: 4712925 (1987-12-01), Beebe
patent: 4723232 (1988-02-01), Beebe
patent: 4723233 (1988-02-01), Beebe
patent: 5159583 (1992-10-01), Lee
patent: 5168183 (1992-12-01), Whitehead

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