Stepping motor for a clock

Details Stepping motor for a clock Stepping motor for a clock

1986-06-20

1987-07-07

Miska, Vit W.

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368160, 310 40MM, G04F 500, G06F 104

Patent

active

046783466

ABSTRACT:
A stepping motor for use in a clock includes a rod core having an effective length L, and a coil wound around the rod core along the effective length L and having a thickness R defined between the center of the rod core and the outermost periphery of the coil. The effective length L and the thickness R satisfy the relation 10.ltoreq.L/R.ltoreq.40. A stator is magnetically connected between the ends of the rod core. A rotor is rotatably disposed between opposed magnetic poles of the stator, and the rotor has a circular shape of a radius r.sub.0 in the range of 1 to 2 mm. Electric pulses having a pulse width t in the range of 9 to 17mS are applied to the coil so that the stepping motor converts more than 20% of the electric energy of the pulses into rotational torque of the rotor.

REFERENCES:
patent: 3984972 (1976-10-01), Yoshino
patent: 4262353 (1981-04-01), Okazaki et al.
patent: 4460859 (1984-07-01), Remus et al.
patent: 4533257 (1985-08-01), Kitano et Al.

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