Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1973-11-20
1976-02-10
Jackmon, Edith Simmons
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
58 28R, 744045, 318147, 318318, 322 29, G04C 304, F16H 5710, H02P 500
Patent
active
039370011
ABSTRACT:
An electronically regulated watch movement comprising a time-wheel mechanism driven by a drive, a generator being coupled to the drive via at least a portion of the time-wheel mechanism and with substantial gear reduction. The generator includes a rotor with magnets and coils for producing a.c. voltage at a frequency of operation FG. An electronic regulating circuit is connected to the generator and includes an oscillator for producing a precise reference frequency FR and a comparator having inputs receiving frequencies FR and FG to compare the same. A power source is connected to the comparator and the generator to supply current to the generator when FG > FR to brake the generator until FG = FR and thereby provide a regulated operation of the time-wheel mechanism.
REFERENCES:
patent: 2886766 (1959-05-01), Gibson
patent: 3134220 (1964-05-01), Meisner
patent: 3344360 (1967-09-01), Moore et al.
patent: 3451210 (1969-06-01), Helterline, Jr. et al.
patent: 3512351 (1970-05-01), Shelley et al.
patent: 3566250 (1971-02-01), Ringstad
patent: 3648453 (1972-03-01), Aizawa et al.
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