Hand reversing system for an electronic timepiece

Details Hand reversing system for an electronic timepiece Hand reversing system for an electronic timepiece

1977-07-21

1979-06-12

Schaefer, Robert K.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

58 23D, 318696, G04B 2700, G05B 1940

Patent

active

041576470

ABSTRACT:
In an analogue electronic timepiece the hands are moved by a stepping motor driven by a time standard signal supplied from a generating circuit comprising a quartz oscillator. In order to amend the time in a reverse direction, for example to correct for a different time zone, means is provided for detecting the angular position of the rotor of the motor and for supplying current in the reverse direction to the coil of the motor when the rotor reaches a predetermined angular position so as to cause the motor to rotate in a reverse direction.

REFERENCES:
patent: 3855781 (1974-12-01), Chihara
patent: 3937003 (1976-02-01), Busch
patent: 3948035 (1976-04-01), Kusumoto
patent: 3958167 (1976-05-01), Nakajima
patent: 4028604 (1977-06-01), Togo
patent: 4032827 (1977-06-01), Dobratz
patent: 4037400 (1977-07-01), Kitai
patent: 4055785 (1977-10-01), Nakajima

Affiliated with

Also associated with

Rating

Hand reversing system for an electronic timepiece does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hand reversing system for an electronic timepiece, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hand reversing system for an electronic timepiece will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1106088