Patent
1975-03-27
1977-03-29
Witkowski, Stanley J.
58152H, G04C 300
Patent
active
040141640
ABSTRACT:
An electronic timepiece including a battery monitoring arrangement wherein the irregular movement of the second hand is utilized to monitor the effective voltage of a battery utilized to energize same is provided. The timepiece includes oscillator circuitry producing a high frequency time standard signal and divider circuitry including a plurality of divider stages adapted to produce low frequency signals in response to the high frequency signal, and batteries coupled to the oscillator circuitry and divider circuitry for energizing same. A step motor includes a rotor adapted to be rotated in response to each driving pulse applied thereto. The display includes a second hand rotated in response to each rotation of the rotor. The battery monitoring circuit is characterized by a voltage detection circuit coupled to the battery for detecting the effective voltage thereof, and producing a signal in response to a drop in the effective voltage below a predetermined level. A monitoring circuit is coupled to the detection circuit and the divider circuit for receiving the slow frequency signals and in response thereto applying periodic drive pulses to the step motor to effect a first periodic rotation of the rotor, the monitoring circuit being further adapted to apply different periodic drive pulses to the step motor in response to the signal applied from the detecting circuit to effect a second and different periodic rotation of the rotor.
REFERENCES:
patent: 3898790 (1975-08-01), Takamune et al.
patent: 3962859 (1976-06-01), Ito
Kabushiki Kaisha Suwa Seikosha
Witkowski Stanley J.
LandOfFree
Electronic timepiece including battery monitoring arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic timepiece including battery monitoring arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic timepiece including battery monitoring arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-543131