Phototube Amplifiers

In order to raise the output level of the phototube high enough for normal control purposes, many arrangements have been proposed, and operate with varying degrees of success.

The following citations provide a reasonably complete coverage of this phase of the facsimile art.

 Wilson & Zworykin (Photocells an Their Applications by E.D. Wilson and V. Zworykin, published by John Wiley & Sons)

Keen (U.S. Patent 1.503,590, E. Keen)

Eulenhofer (U.S. Patent 1.972,221, E. Eulenhofer)

Schmook (U.S. Patent 1,857,745, A. Schmook)

Nakken (U.S. Patent 1,889,758, T.H. Nakken)

Shore (U.S. Patent 1,958,212, Henry Shore)

Zworykin (I.R.E. Proc., Vol. 17, No. 3, March, 1929, V. Zworykin)

Whitaker & Shore (U.S. Patent 1,991,970, J.N. Withaker and Henry Shore)

Ranger (U.S.Patent 1,38,315, U.S. Patent 1,848,839, U.S. Patent 1,848,840, U.S. Patent 1,973,725, U.S. Patent 1,973,726, R.H. Ranger)

Artzt (U.S. Patent 1,988,472, M. Artzt)

Shore & Withaker (U.S. Patent 2,095,717, Henry Shore and J.N. Withaker)

Braden (U.S. Patent 2,084,186, R.A. Braden)

Schroter (Handbuch der Bildtelegraphie und des Fernsehens by F. Schroter, published by Julius Springer, Berlin)

Whitaker & Artzt (RCA Institutes Technical Press, „Radio Facsimile“, pp. 229-247, J.N. Whitaker and M. Artzt)

(C) Marius Rensen

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