Transducer for quartz crystal timepiece

Details Transducer for quartz crystal timepiece Transducer for quartz crystal timepiece

1975-04-04

1976-10-12

Weldon, Ulysses

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, G04C 300

Patent

active

039849724

ABSTRACT:
An improved quartz crystal timepiece transducer wherein torque of the rotor is maximized, and energy consumption is reduced is provided. The transducer includes a permanent magnet rotor having two opposite polarity poles, the rotor being formed with respect to the mechanical axis to define at least two concentric symmetrical equal radii surfaces. Two stator poles have a common coil wrapped therearound for receiving a timekeeping drive signal applied thereto. Both stator poles have symmetrical equal radii semicircular stator surfaces surrounding the rotor, the radii of the stator surfaces having a specific relationship therebetween, and each of the stator poles is eccentrically disposed with respect to the rotor mechanical axis and each other.

REFERENCES:
patent: 2909685 (1959-10-01), Szabo
patent: 3434082 (1969-03-01), Montagu
patent: 3597915 (1971-08-01), Aizawa
patent: 3855781 (1974-12-01), Chihara et al.
B. C. Kud, "Step Motors," pp. 157-159, 1974, West Publishing Co., New York.

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