The dot transmission method described by Ranger (I.R.E. Proc., Vol. 14, No. 2, April, 1926, R. H. Ranger.). in 1926, or the improved method reported by Callahan, Shore and Whitaker (I.R.E. Proc., Vol, 23, No. 12, December, 1935, J.L. Callahan. Henry Shore, J. N. Whiteaker) in 1935, has been employed over the circuits listed above up to the sixties or seventies. A general description of the apparatus developed by the associated companies and other interesting information pertinent to this subject is covered by the following articles;
Telephony (Telephony, Vol. 90, p. 19, April 17th, 1926)
Telg. & Tel. Age (Telg. & Tel. Age, p. 199, May 1st, 1926 and Teleg. & Tel. Age, No. 22, pp. 465-466. October 16th, 1929)
Elec. Rev. London (Elec. Rev., London, Vol. 98, pp. 820-822, June 4)
Wireless World (Wireless World, Vol. 24, pp. 192-195, February 20th, 1929)
Ranger (I.R.E. Proc., Vol. 17, No. 9, pp. 1564-1575, September, 1929, R. H. Ranger)
QST Francais (QST Francais, Vol. 11, pp. 13-20, July, 1930)
E.N.T. (E.N.T. Vol. 9, pp. 49-56, February, 1932, F. Schroeter)
Eastman & Hatch (Marconi Rev., No. 47, pp. 1-12, March-April, 1934, J. W. Eastman and J. F. Hatch)
Noizeux (RevistaTelegrafica, Vol. 25, pp. 728-730, September, 1936, P. J. Noizeux)
- (C) Marius Rensen