Projection engineering (Sept 1929-Nov 1930)
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Projection Engineering, September, 1929
Page 25
Tschorner. Image-transmitting telegraph.
1,135,624; Apr. 13, 1915. Boris Rosing. Electrical telescopy.
1,141,850 ; June 1, 1915. Curt Stille. Image-transformer for distance photography.
1,161,734; Nov. 23, 1915. B. Rosing. Art of electric telescopy.
1,175,313 ; Mar. 14, 1916. A SindingLarsen. Transmission of pictures of moving objects.
1,176,147 ; Mar. 21, 1916. Eliot Keen. Telegraphy.
1,176,148 ; Mar. 21, 1916. Eliot Keen. Telegraphy.
1,329,688; Feb. 3, 1920. Andre Voulgre. Television and telephotographic apparatus.
1,423,737 ; July 25, 1922. H. K. Sandell. Art of transmitting pictures and the like.
1,468,542; Sept. 18, 1923. Magne Petersen. Copying telegraph.
1,470,696; Oct. 16, 1923. Alexander Nicholson. Television.
1,473,882 ; Nov. 13, 1923. A. SindingLarsen. Picture transmission.
1,503,590; Aug. 5, 1924. E. Keen. Method and system for transmitting pictures to a distance.
1,521,188; Dec. 30, 1924. C. Francis Jenkins. Photographing oscillating sparks.
1,521,189; Dec. 30, 1924. C. F. Jenkins. Film reception of broadcasted pictures.
1,521,192; Dec. 30, 1924. C. F. Jenkins. Electroscope picture reception.
1,525,548; Feb. 10, 1925. C. F. Jenkins. Pneumatically controlled light valve.
1,525.549; Feb. 10, 1925. C. F. Jenkins. Radio-picture-frequency chopper.
1,525,551; Feb. 10, 1925. C. F. Jenkins. Mechanically-suspended armature.
1.525,552: Feb. 10, 1925. C. F. Jenkins. Square spotlight source.
1,525,554; Feb. 10, 1925. Stuart Jenks. Electrolytic reflector.
1,529,473; Mar. 10, 1925. Marvin Ferree and Joseph Wissmar. Method and means for transmitting pictures.
1,530.463; Mar. 17, 1925. C. F. Jenkins. Radio vision mechanism.
1,533,422; Apr. 14, 1925. C. F. Jenkins. Web-picture message transmission.
1,544,156: June 30, 1925. C. F. .Tonkins. Transmitting pictures by wireless.
1.511,157: June 30, 1925. C. F. Jenkins. Radio receiving device.
1,544,158; June ■':'». 1925. C. F. Jenkins. Wireless broadcasting of pictures.
1.515,708; July 14, 1925. Doflald M. Terry. Transmission of pictures by electricity.
1,546,193; July 14, 1925. A. Bisslrl. Live-picture production.
1,550,270; Auk. 18, 1925. Maurice B. Long. Transmission of pictures by electricity.
1,559,437; Oct. 27, 1025. ('. F. Jenkins. Double Image radio picture.
1,571,897; Feb. 2, 1026. Founder
d'Albe. Telegraphic transmission of pictures and images.
1,572,989; Feb. 16, 1926. Paid L. Clark. Apparatus for the electrical transmission of visual images.
1,579,263; Apr. 6, 1926. Edward F. Watson. Electrical transmission of pictures.
1,580,896 ; Apr. 13, 1926. H. E. Ives. Picture-analysis.
1,590,270 ; June 29, 1926. Edward F. Watson. Method and apparatus for synchronizing in picture-transmission systems.
1,593,639 ; July 21, 1926. F. W. Reynolds. Optical system.
1,593,651; July 27, 1926. Austin G. Cooley. Phototelegraphy.
1,602,121; Oct. 5, 1926. G. Ramsey. Television.
1,606,227: Nov. 9. 1926. J. Horton, H. Ives and M. Long. Transmission of pictures by electricity.
1,607,893 : Nov. 23, 1926. Herbert E. Ives. Transmission of pictures by electricity.
1,608,527: Nov. 30, 1926. Paul Rainey. Facsimile telegraph system.
1,612,005; Dec. 28, 1926. James D. Ellsworth. Electrical picture-transmission system.
1,627,111; May 3, 1927. Harry Nyquist. Picture-transmitting system.
1,631.963 ; June 14, 1927. H. E. Ives. Transmission of pictures by electricity.
1.647,765; Nov. 1, 1927. H. D. Arnold. Transmission of pictures by electricity.
1,648,058; Nov. 8, 1927. R. D. Parker. Electrovision.
1.64S.127: Nov. 8, 1927. H. E. Ives. Transmission of pictures by electricity.
1,64S,6S7; Nov. 8, 1927. C. A. Hoxie. Method and apparatus for the transmission of pictures and views.
1.649,309; Nov. 15, 1927. H. E. Ives. Photomechanical reproduction of pictures.
[ADDENDA]
Goldsmith, Alfred N. "Image transmission by radio waves." P. I. R. E., vol. 17; 1929.
Horton, J. W. "The electrical transmission of pictures and images." P. I. R. E., vol. 17 ; 1929.
Ives, H. E. "Television in colors." Bell Laboratories Record, 7, 439-444; July, 1929.
Jenkins, C. Francis. "The drum scanner in radiomovies." P. I. R. E., vol. 17 ; 1929.
Jenkins, C. Francis. "Radio movies and the theater." T. 8. M. P. E., 11, 45; July, 1927.
Jenkins, C. Francis. "Pantomime pictures by radio for home entertainment." T. 8. M. P. E., 12, 110; Apr, 1928.
Jenkins, C. Francis. "Radio photographs, radio movies, and radio vision." T. 8. M. P. E., No. 16, 7S ; May, 1923.
Ranger, R. H. "Mechanical developments of facsimile equipment." P. I. R. E., vol. 17; 1929.
Taylor, John B. "Narrow-casting." T. 8. M. P. E., 11, 759 ; Sept., 1927.
Special Channel and New Standards for Television
IN the gradual development of television, still generally considered some time distant for commercial purposes except for experimenters, engineers of the Television Committee of the R. M. A. headed by Mr. D. E. Replogle of New York, are keeping pace with laboratory and experimental developments of television by flexible standardization. Changes in the first television standards, evolved by the R. M. A. Committee at the first organized meeting of television engineers more than a year ago, are being studied ;is necessary. Another meeting of the Committee is planned tbis fall.
A separate air cliannel for a synchronizing signal for television experiments may be requested of the Federal Radio Commission. The R. .\t. A. Television Committee has recommended thai the commission consider the advisability and possibility
of assigning a separate channel on which a standard synchronizing frequency may be broadcast. The use of such ;i frequency would be very broad, it is believed, in other scientific services. Standard recommendations relating to scanning are being
retained for the present. The R. M. A. recommends thai scanning .'it the re
ceiving end be from left to right, and from top to bottom in uninterrupted sequence, looking directly at the object.
Standard practices for television experimenters — not rigid standards regarding speed elements, arc being recommended by the R. M. A. Television Committee. Assuming that the first successful television probably will be from talking picture films, it
is recommended thai experimenters
use discs to give IS hy .".7 ' j picture elements, at speeds of 15," 20 and 21 frames per second, and also 60 by 72 at 20 and 21 frames per second. Most talking pictures are projected at 21 frames per second, and a slower rate, it is believed, would not bring as satisfactory results, although there is admitted difficulty in obtaining the higher speed With standard motors.
Televish ngii rs are of the
Opinion that it is too oarh to adopt lived standards for disc sp I or hole
arrangements of television transmitters, and that it is too early to impose rigid standards on the television an to which it is hoped Mini believed amateurs will make valuable con i rlbutions.