Television Newspaper (Jul, 1937)

Television Newspaper

BROADCASTS WORDS TYPED ON TAPE

FLASHING news reports, stock-market quotations, farm prices, and other types of information in printed form, an apparatus recently designed by William H. Peck, New York inventor and former U.S. Navy optical expert, has introduced a novel form of television news service.

At the broadcasting station, an operator types out the items on a continuous translucent cellulose tape which is fed automatically into a cabinet holding the television sending apparatus. Here, a light beam, reflected from the tiny mirrors of a rotating scanning drum, passes through the cellulose strip before reaching a photoelectric cell which transforms the variations in light intensity into electrical impulses. These, in turn, are amplified and sent out by short-wave radio.

Picked up by the antenna at a receiving point, the impulses are carried to an ingenious light valve which varies the amount of illumination passing from a lamp to another mirror-studded scanning drum according to the strength of the impulse. The drum, whirled by a small electric motor, throws the light upward onto a frosted glass panel in a shadowless viewing cabinet. The words and figures originally typed on the cellulose tape at the broadcasting station appear here and are reflected, for ease in viewing, by a tilted mirror within the top of the cabinet. These images are reported to be so clear that they can be read easily in daylight. The items broadcast move across the viewing screen in the manner of a trailing electric sign.

It is possible to operate the new service over telephone lines as well as by radio, wires instead of ether waves carrying the impulses. Initial cost and operating expense are said to be small.

8 comments
  1. TomLR says: June 7, 20113:33 pm

    Interesting. Sony Corporation did not invent the term “light valve.”

  2. jayessell says: June 8, 20118:20 am

    Yeah… Tell me more about this “Light Valve”…
    If it ever existed.

    (Sounds like a flux capacitor to me!)

  3. JMyint says: June 8, 20119:54 am

    Actually this sounds very much (exactly) like an Eidophor projector.

    en.wikipedia.org/wiki/E…

  4. Jari says: June 8, 201110:40 am

    One Light Valve as requested: http://books.google.com…

  5. DrewE says: June 8, 201110:51 am

    Given that this is a mechanical scanning television setup, it seems probable to me that the “light valve” is some electromechanical doodad. My guess would be that it’s based around a lightweight mirror actuated by a solenoid system, possibly operating in a vacuum; it would certainly have been possible to construct such a thing (as it’s not vastly different in nature from, say, a dynamic loudspeaker).

  6. JMyint says: June 8, 201111:23 am

    The Eidophor use electrostatically charged oil, uncharged oil would reflect the light back to the mirrors, charged oil would reflect the light elsewhere therefore acting as the light valve.

  7. John says: June 8, 201111:33 am

    Rather than guessing (and inspired by my Finnish pal) I found that there are a number of patents for light valves around this time:
    http://www.google.com/p…
    http://www.google.com/p…

    However, here is the patent for the scanning disk in this invention by Mr. Peck:
    http://www.google.com/p…

  8. Jari says: June 8, 20113:09 pm

    DrewE and JMyint: You didn’t actually >read< that article that I linked? Mr. Beck was mentioned as the inventor in both. So it can be assumed that it's a electromechanical mirror distorted by magnetic field in both machines. A kind of a one element DLP.

    John: Good links, as always. So we can add an piezoelectrically driven slit and a "Ribbons-in-a-valve" driven by sound??? to the repertoire. (Patent texts are sometimes REALLY hard to read and understand….)

    I do wonder, what it uses as a "short term memory" to show the characters, delay lines?

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