US1748883A - Transmission of pictures - Google Patents

Transmission of pictures Download PDF

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Publication number
US1748883A
US1748883A US263030A US26303028A US1748883A US 1748883 A US1748883 A US 1748883A US 263030 A US263030 A US 263030A US 26303028 A US26303028 A US 26303028A US 1748883 A US1748883 A US 1748883A
Authority
US
United States
Prior art keywords
picture
light
perforations
screen
pictures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US263030A
Other languages
English (en)
Inventor
Ray D Kell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE359126D priority Critical patent/BE359126A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US263030A priority patent/US1748883A/en
Priority to DEI37129D priority patent/DE498145C/de
Priority to FR671691D priority patent/FR671691A/fr
Priority to GB9032/29A priority patent/GB308277A/en
Application granted granted Critical
Publication of US1748883A publication Critical patent/US1748883A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
    • H04N3/04—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving aperture also apertures covered by lenses

Definitions

  • My invention relates to the transmission of pictures, and has for its principal object the provision of an improved apparatus and method of operation whereby polychromatic pictures may be readily transmitted from one place to another.
  • FIG. 1 and 2 respectively illustrate picture transmitting and receiving apparatus wherein my invention has been embodied:
  • the picture'transmitting apparatus illustrated by Fig. 1 includes a light source which is enclosed within a casing 1 and is arranged to project light through a lens 2, a multi-colored disk 3 and a perforated screen 4 upon a picture 5.
  • the screen 4 is provided with two spiralshaped groups of perforations 6 and 7 and is coupled to the shaft of a driving motor 8, and that the disk 3 is provided with different colored semi-circular segments 9 and 10 which are coupled to the shaft of the motor 8 through gears 11 and 12.
  • the relation between the groups of perforations in the screen 4 is. such that light is transmitted through the perforations 6 to a group of elemental areas distributed over the entire surface of the picture and is transmitted through the perforations 7 to a group of elements which are also distributed over the entire picture but lie between the elements to which light is transmitted through the perforations 6.
  • the screen 4 and disk 3 are rorated in opposite directions at the same speed, the light is applied to one group of elements of the picture through the segment 10 and the perforations 6 and to another group of elements of the picture through the segment 9 and the perforations 7
  • the light impulses reflected from the picture 5 are received by the light sensitive elements 13 which convert them into electrical impulses.
  • a commutator 20 is mounted on the shaft of the motor 21 which drives the screen 18. It will be observed that this commutator is provided with a slip ring 22 connected to one terminal of the radio receiver 15, with a segment 28 connected to the slip ring 22 and arranged to complete the connections of the lamp 17 while one group of perforations is passing the lamps, and with a segment 24 connected to the slip ring 22 and arranged to complete the connections of the lamp 16 when the other group of perforations is passing the lamps. Under these conditions alternate elemental areas ofv this picture are reproduced in colors corresponding to the color of the lamps 1 6 and 17.
  • the rapidity with which the different colored pictures are produced depends on the rotational speed of the screen 4. It has been found for example that the effect of a ninetysix line picture repeated twenty times per second is produced if the rotational speed is such that alternate pictures of forty-eight lines are produced at the rate of ten per second. -As a result of this observation, it
  • The] embodiment of, the invention illusareas to be exposed to light of another color.
  • a disk provided with segments of different colors, a screen provided with different spiral-shaped'groups of perforations, a'source of light, and. means arranged to cause light from said source to be alternately projected through one of said segments and one of saidgroups and through ments and one of said groups and by a beam of light projected through another of said segments and another of said groups.
  • the method of picture transmission which includes alternately exposing one group of elemental areas distributed over the surface of the picture to light of one color, and exposing another group of elemental areas distributed over the surface of the picture to light of another color.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
US263030A 1928-03-20 1928-03-20 Transmission of pictures Expired - Lifetime US1748883A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE359126D BE359126A (enrdf_load_stackoverflow) 1928-03-20
US263030A US1748883A (en) 1928-03-20 1928-03-20 Transmission of pictures
DEI37129D DE498145C (de) 1928-03-20 1929-02-21 Drahtlose Farbenbilduebertragung
FR671691D FR671691A (fr) 1928-03-20 1929-03-19 Perfectionnements aux appareils de télévision
GB9032/29A GB308277A (enrdf_load_stackoverflow) 1928-03-20 1929-03-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US263030A US1748883A (en) 1928-03-20 1928-03-20 Transmission of pictures

Publications (1)

Publication Number Publication Date
US1748883A true US1748883A (en) 1930-02-25

Family

ID=23000080

Family Applications (1)

Application Number Title Priority Date Filing Date
US263030A Expired - Lifetime US1748883A (en) 1928-03-20 1928-03-20 Transmission of pictures

Country Status (5)

Country Link
US (1) US1748883A (enrdf_load_stackoverflow)
BE (1) BE359126A (enrdf_load_stackoverflow)
DE (1) DE498145C (enrdf_load_stackoverflow)
FR (1) FR671691A (enrdf_load_stackoverflow)
GB (1) GB308277A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480571A (en) * 1940-09-07 1949-08-30 Columbia Broadcasting Syst Inc Color television
US2636602A (en) * 1947-06-18 1953-04-28 U D Engineering Company Ltd Apparatus for detecting the presence of foreign bodies on the bottoms of transparent vessels
US3223777A (en) * 1962-11-26 1965-12-14 Jack A Crawford Scanner system
US20090000141A1 (en) * 2007-06-29 2009-01-01 Andis Company Hair dryer with light source

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480571A (en) * 1940-09-07 1949-08-30 Columbia Broadcasting Syst Inc Color television
US2636602A (en) * 1947-06-18 1953-04-28 U D Engineering Company Ltd Apparatus for detecting the presence of foreign bodies on the bottoms of transparent vessels
US3223777A (en) * 1962-11-26 1965-12-14 Jack A Crawford Scanner system
US20090000141A1 (en) * 2007-06-29 2009-01-01 Andis Company Hair dryer with light source
US8434238B2 (en) * 2007-06-29 2013-05-07 Andis Company Hair dryer with light source

Also Published As

Publication number Publication date
FR671691A (fr) 1929-12-16
GB308277A (enrdf_load_stackoverflow) 1929-11-21
BE359126A (enrdf_load_stackoverflow)
DE498145C (de) 1930-05-19

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