Method and apparatus for driving facsimile transceivers

Details Method and apparatus for driving facsimile transceivers Method and apparatus for driving facsimile transceivers

H - Electricity

04

N

350/9

H04N 1/36 (2006.01)

Patent

CA 1096483

ABSTRACT OF THE DISCLOSURE In a facsimile system, rotation of a transmitter drum carrying a document is synchronized with the rotation of a receiver drum carrying a copy medium. Synchronization of the rotating transmitter drum and the rotating receiver drum is assured by driving the transmitter drum from an AC power line and locking the receiver drum to the AC power line frequency once synchronization of the transmitter drum and the receiver drum have been achieved. In order to achieve initial synchronization, the drive for the receiver drum is initially locked to a source of controlled frequency until a predetermined angular position of the receiver drum relative to a predetermined angular position of the transmitter drum is attained. The receiver motor which is of the DC type is controlled in angular frequency after initial synchronization by generating a signal having a frequency phase locked to the AC power line frequency.

253240

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