GB291121A - Improvements in or relating to television apparatus - Google Patents

Improvements in or relating to television apparatus

Info

Publication number
GB291121A
GB291121A GB3035726A GB3035726A GB291121A GB 291121 A GB291121 A GB 291121A GB 3035726 A GB3035726 A GB 3035726A GB 3035726 A GB3035726 A GB 3035726A GB 291121 A GB291121 A GB 291121A
Authority
GB
United Kingdom
Prior art keywords
screen
obliterating
picture
source
image
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
Application number
GB3035726A
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.)
Baird Television Ltd
Original Assignee
Baird Television Ltd
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
Application filed by Baird Television Ltd filed Critical Baird Television Ltd
Priority to GB3035726A priority Critical patent/GB291121A/en
Publication of GB291121A publication Critical patent/GB291121A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

291,121. Television, Ltd., and Baird, J. L. Nov. 30, 1926. Television.-The screen upon which a picture is reproduced is provided with means for securing persistence of the image and for obliterating elements of the image before each new signal is received. Thus a screen 10, Fig. 1, having on its surface a fluorescent material such as calcium sulphide may be activated by a beam of light from a source 12 which traverses an exploring device such as a rotating disc 11 carrying a spiral of lenses. Immediately before the line element 16 of the picture is transversed by the activating pencil, it is traversed by a beam of different wave-length from a source 13 which has the effect of obliterating the previous fluorescence. The source 13 may be an arc with an ebonite filter-screen. In a modification (Fig. 2, not shown) the obliterating beam 13<a> does not explore the picture but floods it once per revolution through a large aperture in the disc 11, so that the whole of the image is obliterated simultaneously. In a further modification a system of lamps or shutters, controlled by the incident beam through relays, may be substituted for the fluorescent screen.
GB3035726A 1926-11-30 1926-11-30 Improvements in or relating to television apparatus Expired GB291121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3035726A GB291121A (en) 1926-11-30 1926-11-30 Improvements in or relating to television apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3035726A GB291121A (en) 1926-11-30 1926-11-30 Improvements in or relating to television apparatus

Publications (1)

Publication Number Publication Date
GB291121A true GB291121A (en) 1928-05-30

Family

ID=10306360

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3035726A Expired GB291121A (en) 1926-11-30 1926-11-30 Improvements in or relating to television apparatus

Country Status (1)

Country Link
GB (1) GB291121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954608A (en) * 1956-10-30 1960-10-04 Reed C Lawlor Drift and ground speed indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954608A (en) * 1956-10-30 1960-10-04 Reed C Lawlor Drift and ground speed indicator

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