Load measuring device for the gear train of a timepiece

Details Load measuring device for the gear train of a timepiece Load measuring device for the gear train of a timepiece

1979-05-24

1982-02-09

Weldon, Ulysses

Horology: time measuring systems or devices

Chronological

With mechanical or electromechanical driven display

368 28, 368 35, G04B 1900

Patent

active

043153291

ABSTRACT:
A load measuring device for a stepping motor of an analogue electronic timepiece having a stator, a rotor and a coil includes a pulse generator for producing a range of different pulse width normal driving pulses and a driving circuit for successively applying the driving pulses to the motor. A detector detects the rotation and non-rotation state of the rotor in response to the application of each driving pulse and a control circuit is responsive to the detection by the detector for controlling the application by the driving circuit of the minimum pulse width normal driving pulse capable of driving the motor. Each minimum pulse width driving pulse corresponds to the load on the motor at that time and an analyzer analyzes the pulse width of the driving pulses to thereby indicate the load on the motor.

REFERENCES:
patent: 3855781 (1974-12-01), Chihara

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