Electric clock

Details Electric clock Electric clock

1974-11-18

1976-02-10

Jackmon, Edith Simmons

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318138, H02K 5902, G04C 300

Patent

active

039370038

ABSTRACT:
The invention relates to an electric clock with an oscillator, especially a quartz oscillator, a frequency divider connected thereto, and a control stage connected to the output of the frequency divider either directly or via a pulse shaper stage. Through the control stage, a stepper motor, preferably a single-phase stepper motor, connected to the hand mechanism is acted upon by square-wave pulses of identical or alternating polarity.

REFERENCES:
patent: 3597915 (1971-08-01), Aizawa
patent: 3744327 (1973-07-01), Hetzel
patent: 3810355 (1974-05-01), Ito
patent: 3860844 (1975-01-01), Hetzel

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