US1760866A - Method and apparatus for transmitting documents electrically - Google Patents

Method and apparatus for transmitting documents electrically Download PDF

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Publication number
US1760866A
US1760866A US266355A US26635528A US1760866A US 1760866 A US1760866 A US 1760866A US 266355 A US266355 A US 266355A US 26635528 A US26635528 A US 26635528A US 1760866 A US1760866 A US 1760866A
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United States
Prior art keywords
tube
disposed
orifice
document
electrically
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Expired - Lifetime
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US266355A
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English (en)
Inventor
Belin Edouard
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Individual
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Individual
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Publication of US1760866A publication Critical patent/US1760866A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/029—Heads optically focused on only one picture element at a time

Definitions

  • This invention relates to a method of transmitting documents by electric means and to an apparatus for carrying the said method into practice.
  • the receiver will not be described herein as it may be of any suitable type. known per se. with a movable receiving element moving synchronously with the movable system carrying the document to be transmitted.
  • the eilects may be regulated as a function of the rate of translation in electrical values of luminous values of the original document.
  • the luminous values of the document are transformed into electrical values by a photo-electric element.
  • the current thus modulated must be amplified and it results from this succession of phenomena alterations of the modulation which are subsequently aggravated by the line and by the amplifying devices upon the arrival thereof and particularly in the case of radio transmission.
  • the present invention which relates to the above described method, likewise relates to means for the realization of the said method, hereinafter to be described in connection with three embodiments by way of an illustrative explanation of the said method.
  • FIG. 1 is a diagram illustrating one embodiment of the invention conventionally
  • Fig. 2 is a view similar to Fig. 1 of a modification
  • Fig. 3 represents an explanatory geometri cal diagram.
  • the document to be transmitted is here supposed to be on a cylinder 1 which turns and is displaced on i s shaft, in the manner of a nut on a bolt. It is lighted powerfully by an exterior source which can illuminate in a total manner as the sunlight or in a small region a such as by lamp 2 and condenser 3.
  • a truncated cone 4 In front of the cylinder 1 is disposed a truncated cone 4 whose small base 6 is very near the cylinder and whose large base 0 opens on the photosensitive cell S.
  • the base Z) carries a diaphragm having a very small opening.
  • the said orifice acts as an objective and as will be observed, in the partof the text, drawing or the like, the light of its image at d will be different in conformity therewith from whence the action on the element (Z differs and consequently a corresponding variation in the local circuit LL in which the said element is inserted.
  • the precision of the exploration depends upon the ratio of 2 2.
  • the current flowing in LL may be amplified either into direct or alternating current if in this case the document a be lighted with a non-continuous light by means of a perforated disc turning in a beam of light emanating from the source
  • the diaphragm b is replaced by a Stanhope lens having a short focus placed very near the surface a and giving at (Z a sufliciently precise image.
  • Fig. 2 the two organs of Fig. 1 are united.
  • the tube 4 carries as the cone l the photo-sensitive cell S and at its other extremity a micro-photographic objective 7.
  • a mirror 5 On the interior a mirror 5 is disposed which is pierced with an elliptical hole 6 and reflects the light from the source 2 whose lens 7 gives a parallel beam on to the element a.
  • the image of the element a thus illuminated is formed on d by the objective 7''.
  • An ad ustable diaphragm 8 determines the precision of the exploration.
  • Amplification and non-interrupted light may be adapted to this embodiment also.
  • An apparatus of the type described comprising in combination, document holding and displacing means, a tube, said tube having an orifice adjacent one end, a micro-photographic objective disposed in one end of said tube in close proximity to said means, a mirror having an elliptical hole obliquely disposed in said tube opposite said orifice, illuminating means for said orifice, a photoelectric cell disposed in the other end of said tube and a local circuit controlled by said cell.
  • An apparatus of the type described comprising in combination, document holding and displacing means, a tube, said tube having an orifice adjacent one end, a micro-photographic objective disposed in one end of said tube in close proximity to said means, a mirror having an elliptical hole obliquely disposed in said tube opposite said orifice, illuminating means for said orifice, a photoelectric cell disposed in the other end of said tube, a local circuit controlled by said cell and an adjustable diaphragm disposed in said tube adjacent said photoelectric cell.
  • An apparatus of the type described comprising in combination, document holding and displacing means, a tube, said tube having an orifice adjacent one end, a micro-photographic objective disposed in one end of said tube in close proximity to said means, a mirror having an elliptical hole obliquely disposed in said tube opposite said orifice, illuminating means for said orifice, means for casting parallel beams of light associated with said illuminating means, a photo-electric cell disposed in the other end of said tube, a local circuit controlled by said cell and an adjustable diaphragm disposed in said tube adjacent said photo-electric cell.
  • Cooley 1,595,651 178-6 Ives 1,647,651 178-6 Parker 1,648,058 178-6 Jenkins E;e.l6, 882 178-6 Sellers 959,559 l75-7

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
US266355A 1927-04-27 1928-03-31 Method and apparatus for transmitting documents electrically Expired - Lifetime US1760866A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1760866X 1927-04-27

Publications (1)

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US1760866A true US1760866A (en) 1930-06-03

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US266355A Expired - Lifetime US1760866A (en) 1927-04-27 1928-03-31 Method and apparatus for transmitting documents electrically

Country Status (3)

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US (1) US1760866A (en, 2012)
BE (1) BE349381A (en, 2012)
NL (1) NL23322C (en, 2012)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654810A (en) * 1949-11-15 1953-10-06 Miessner Inventions Inc Photoelectric translating system
US3167612A (en) * 1961-06-01 1965-01-26 Litton Systems Inc Electro-optical scanning apparatus utilizing an optical transmission link
US3609233A (en) * 1969-09-29 1971-09-28 American Optical Corp Electron tube facsimile apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654810A (en) * 1949-11-15 1953-10-06 Miessner Inventions Inc Photoelectric translating system
US3167612A (en) * 1961-06-01 1965-01-26 Litton Systems Inc Electro-optical scanning apparatus utilizing an optical transmission link
US3609233A (en) * 1969-09-29 1971-09-28 American Optical Corp Electron tube facsimile apparatus

Also Published As

Publication number Publication date
NL23322C (en, 2012)
BE349381A (en, 2012)

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