Braking circuit for use with phase synchronizing circuitry

Details Braking circuit for use with phase synchronizing circuitry Braking circuit for use with phase synchronizing circuitry

1974-07-26

1976-02-10

Morrison, Malcolm A.

Telegraphy

Systems

Line-clearing and circuit maintenance

178 66R, 318314, 318318, H04L 700, H02P 516

Patent

active

039378837

ABSTRACT:
For use with a phase synchronizing circuit which synchronizes an A-C motor at the receiving end of a communication link with one at the transmitting end thereof by repeatedly applying to the main coils of the receiving end motor, reduced frequency signals having a lower frequency than the rated frequency thereof to thereby reduce the phase deviation between the receiving and transmitting end motors, the improvement of a braking circuit for enhancing the speed and accuracy of the phase synchronizing circuit, the braking circuit including means for applying a direct-current voltage to the main coils of the receiving end motor prior to or in lieu of each of the reduced frequency signals.

REFERENCES:
patent: 2881377 (1959-04-01), Apa et al.
patent: 3385928 (1968-05-01), Rosenheck
patent: 3505472 (1970-04-01), Reese et al.
patent: 3582550 (1971-06-01), Latanzi et al.
patent: 3622703 (1971-11-01), Ricketts, Jr. et al.
patent: 3628114 (1971-12-01), Pattantyus

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