Reduction gear for electronic timepiece

Details Reduction gear for electronic timepiece Reduction gear for electronic timepiece

1980-07-17

1982-11-02

Miska, Vit W.

Horology: time measuring systems or devices

Arbor and pinion details

74434, 74457, G04B 2900, F16H 5517

Patent

active

043576958

ABSTRACT:
A pinion of a reduction gear intended for use in electronic timepieces having a stepping motor, particularly wrist watches, takes the form of a cylindrical body having an axial blind hole and two teeth milled at one end of the body. The flancs of the teeth are plane parallel surfaces. The distance between the axis of rotation of the pinion and the axis of rotation of a toothed wheel of the reduction gear is slightly less than the radius of the tip-circle of the wheel, so that the two teeth of the pinion block the wheel during the resting period of the motor. If a wheel with 60 teeth is used, it may constitute the fourth wheel in an electronic watch having hands.

REFERENCES:
patent: 2307886 (1943-01-01), Hansson
patent: 3699822 (1972-10-01), Wildhaber
patent: 3765651 (1973-10-01), Lifferth
patent: 4200000 (1980-04-01), Fluehmann

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