Facsimile Tape

If an extensive power network is not available for drive power at the scanner and recorder, three alternatives can be considered. A double helix at the recorder with scanner and recorder drive essentially at same speed. A start-stop method disclosed by:
 

 Hell (U.S. Patent 2,113,429, R.Hell) may also be employed.

The ideal, of course, is complete synchronous drive.

A companion facsimile symposium paper, prepared by:

Shore and Whitaker (RCA Institutes Technical Press, “Radio Facsimile”, pp.270-283, by Henry Shore and J.N. Whitaker) reports on a development program directed to provide a synchronous drive system satisfactory for commercial service.

(C) Marius Rensen

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