Stepping motor mechanism for an electronic watch

Details Stepping motor mechanism for an electronic watch Stepping motor mechanism for an electronic watch

1978-06-14

1980-12-23

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With pulse transforming means

368217, 318138, 318696, G04C 1900, G04C 300, H02K 2900

Patent

active

042414342

ABSTRACT:
An electronic timepiece includes a stepping motor having a coil and a rotor. Circuitry is provided for generating and applying alternating pulses to the motor coil to effect forward stepwise rotation of the motor rotor in a forward direction and for generating and applying alternating pulses to the motor coil to effect reverse stepwise rotation of the motor rotor in a reverse direction. The reverse rotation is achieved by sets of three alternating pulses with the first pulse of each set effecting incremental angular movement of the motor rotor in the forward direction followed by the second and third pulses which effect greater icremental angular movement of the motor rotor in the reverse direction to thereby obtain for each pulse set a net angular movement of the motor rotor in the reverse direction.

REFERENCES:
patent: 4055785 (1977-10-01), Nakajima et al.
patent: 4066947 (1978-01-01), Nakajima et al.
patent: 4070592 (1978-01-01), Snowdon et al.
patent: 4112671 (1978-09-01), Kato et al.
patent: 4126796 (1978-11-01), Ito
patent: 4129981 (1978-12-01), Nomura et al.
patent: 4150536 (1979-04-01), Nakajima et al.

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