US1788227A - Transmission of pictures - Google Patents

Transmission of pictures Download PDF

Info

Publication number
US1788227A
US1788227A US386270A US38627029A US1788227A US 1788227 A US1788227 A US 1788227A US 386270 A US386270 A US 386270A US 38627029 A US38627029 A US 38627029A US 1788227 A US1788227 A US 1788227A
Authority
US
United States
Prior art keywords
picture
slot
disc
rotatable
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
US386270A
Other languages
English (en)
Inventor
Jetson O Bentley
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 BE372649D priority Critical patent/BE372649A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US386270A priority patent/US1788227A/en
Priority to GB20912/30A priority patent/GB347969A/en
Priority to FR700088D priority patent/FR700088A/fr
Application granted granted Critical
Publication of US1788227A publication Critical patent/US1788227A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

  • the single figure of the drawing is a diagrammatic illustration of a picture transmitting apparatus wherein my invention has been embodied.
  • This apparatus includes a picture 10 upon which light is projected from a source 11 through a lens 12, a fixed gear 13, a rotatable disc 14, a slotted rotatable member 16 and a lens 17
  • the light reflected from the successive elemental areas of the picture or image is received by a plurality of light sensitive cells 18 through which it is converted into electrical impulses corresponding to the shade of these elemental areas. These impulses are utilized in a well known manner to control the output of the radio transmitter 19.
  • the member 16 is closed at one .end except fora slot 20, is in the form of a hollow cylinder, is mounted in bearings 21 and 22 and is arranged to be rotated by suitable means such as, a motor 23 to which it is geared through gears 24 and 25. At its closed end the member 16 is provided with a bearing 26 in which the shaft of the disc 14 is journaled. At the opposite end of this shaft a gear 27 is provided. Diametrically opposite the bearing 26 is provided a counterweight 28 for counter-balancing the weight of the bearing 26 and disc 14.
  • the disc 14 will rotate at forty-two revolutions per second. Under these conditions the twelve slots in the disc 14 will sweep across the slot 20 twice for every revolution of the cylinder member 16. This will correspond to a twenty-four line picture and twenty-one pictures per second. As will be readily understood by those skilled in the art, any other desired combination of pictures per second and lines per picture may be readily secured.
  • the slot 20 in the cylindrical member 16 is comparatively narrow at its center and comparatively wide at its ends.
  • the illumination near the edges of the picture is made substantially the same as at the center.
  • the detail of the picture of course is not improved by making the illumination uniform throughout the picture, but the lack of detail near the edge of the picture is not likely to be objectionable where the picture is of good quality in its central area.
  • the method of picture transmission which comprises successively scanning a picture along radial lines, and increasing the sizeof the scanning beam near the ends of said lines.
  • a picture transmitting apparatus including a rotatable cylindrical member closed at one of its ends and provided with a. slot in said end, a bearing mounted on said rotatable member, a rotatable disc provided with a plurality of radial slots and with a shaft mounted in said bearing, and means for causing the slots in said disc to be successively gwept past the slot of said cylindrical mem- 4.
  • a picture transmitting apparatus including a rotatable cylindrical member closed at one of its ends and provided with a slot in said end, a bearing mounted on said rotatable member, a rotatable disc provided with a plurality of radial slots and with a shaft mounted in said bearing, a stationary gear and a gear mounted on said shaft and arranged to cooperate with said stationary gear for causing the slots of said disc to be moved successively past the slots of said cylindrical member.
  • a picture transmitting apparatus including a rotatable cylindrical member closed at one of its ends andprovided with a slot in said end, a bearing mountedon said rotatable member, a rotatable disc provided with a plurality of radial slots and with a shaft mounted in said bearing, a; stationary gear and a gear mounted on said shaft and arranged to cooperate with said stationary gear for causing the slots of said disc to be moved successively past the slots of said cylindrical member, and driving means geared to said cylindrical member.
  • a picture transmitting apparatus comprising a rotatable member having a slot therein intersectin the axis of rotation, a rotatable disk having radial slots arran ed to be moved past the slot in the rotata le member, means for revolving the axis of rotation ofthe disk with said rotatable member and means for rotating said member and disk.
  • a picture transmitting apparatus com prising a rotatable member having a slot therein extending through and on opposite sides of the axis of rotation, the ends of the slot being wider than the intermediate portion, and a rotatable disk provided with a plurality of radial slots arranged to be successively moved past the slot in the rotatable member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Sewing Machines And Sewing (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Optical Transform (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
US386270A 1929-08-16 1929-08-16 Transmission of pictures Expired - Lifetime US1788227A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE372649D BE372649A (en(2012)) 1929-08-16
US386270A US1788227A (en) 1929-08-16 1929-08-16 Transmission of pictures
GB20912/30A GB347969A (en) 1929-08-16 1930-07-10 Improvements in and relating to the transmission of pictures
FR700088D FR700088A (fr) 1929-08-16 1930-08-05 Système de transmission d'images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US386270A US1788227A (en) 1929-08-16 1929-08-16 Transmission of pictures

Publications (1)

Publication Number Publication Date
US1788227A true US1788227A (en) 1931-01-06

Family

ID=23524895

Family Applications (1)

Application Number Title Priority Date Filing Date
US386270A Expired - Lifetime US1788227A (en) 1929-08-16 1929-08-16 Transmission of pictures

Country Status (4)

Country Link
US (1) US1788227A (en(2012))
BE (1) BE372649A (en(2012))
FR (1) FR700088A (en(2012))
GB (1) GB347969A (en(2012))

Also Published As

Publication number Publication date
FR700088A (fr) 1931-02-24
BE372649A (en(2012))
GB347969A (en) 1931-05-07

Similar Documents

Publication Publication Date Title
US1647631A (en) Optical system
US1417457A (en) Electric illumination
US1788227A (en) Transmission of pictures
DE582730C (de) Einrichtung zum Abtasten bzw. Aufbauen von Fernsehbildern mit paralleler Zeilenrasterung
GB394446A (en) Process for the decomposition and composition of pictures particularly in television
US1855370A (en) Picture distorting apparatus
US2021889A (en) Television receiver
US1679086A (en) Spiral-mounted lens disk
US1862455A (en) Television scanning device
US1871794A (en) System for projecting light in variant colors
US2285593A (en) Scanning method and device
US2149198A (en) Television apparatus
US2027520A (en) Shutter mechanism for motion picture projectors
US2229456A (en) Television apparatus
US2025027A (en) Television system and apparatus
US1824731A (en) Picture transmitting system
SU45340A1 (ru) Устройство дл разложени изображени
US1802802A (en) Television device
US1695924A (en) Television apparatus
US2202795A (en) Multiple scanning system
US1422055A (en) Machine for grinding beveled rim surfaces on spectacle glasses
US2176847A (en) Scanning apparatus
US1852784A (en) Picture scanning system
DE558480C (de) Fernsehempfangseinrichtung
US1998347A (en) Television apparatus