Horology: time measuring systems or devices – Escapements – With oscillating or reciprocating means
Patent
1998-08-17
2000-03-14
Miska, Vit
Horology: time measuring systems or devices
Escapements
With oscillating or reciprocating means
368165, 368179, 73 143, 73 148, G04B 1500, G04B 1704, G04F 500, G01C 1738
Patent
active
060363584
ABSTRACT:
A system and method are provided for calculating the period of a mechanical clock while minimizing the effects of extraneous noise. The method of the invention senses three sounds from the clock and calculates the period of the clock based on those three sounds. The method defines a blanking period between the first and the second sounds and the second and the third sounds. During this blanking period, the method ignores all sound to prevent such sound from being mistaken for sounds from the clock. The method also defines an expected time interval between sounds from the clock. The system senses the beats of a mechanical clock while minimizing noise. The system includes a pick-up device, an amplifier coupled to the pick-up device, and a microcontroller configured to control the gain of the amplifier so that the expected time delay interval becomes approximately equal to the actual time interval, thereby minimizing noise. The system also supports a mode in which the durations of two consecutive half-periods are compared to assess their uniformity.
REFERENCES:
patent: 3955409 (1976-05-01), Moser et al.
patent: 3960344 (1976-06-01), Dugan
patent: 4395137 (1983-07-01), Wiley
patent: 4723233 (1988-02-01), Beerg
International Business Machines - Corporation
Miska Vit
Townsend Tiffany L.
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