US1869735A - Television and like apparatus - Google Patents

Television and like apparatus Download PDF

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Publication number
US1869735A
US1869735A US397983A US39798329A US1869735A US 1869735 A US1869735 A US 1869735A US 397983 A US397983 A US 397983A US 39798329 A US39798329 A US 39798329A US 1869735 A US1869735 A US 1869735A
Authority
US
United States
Prior art keywords
disc
record
image
gramophone
variations
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
US397983A
Other languages
English (en)
Inventor
Baird John Logie
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
Application granted granted Critical
Publication of US1869735A publication Critical patent/US1869735A/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
    • 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
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H04N3/34—Elemental scanning area oscillated rapidly in direction transverse to main scanning direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums

Definitions

  • This invention is for improvements in or relating to television and like apparatus, and has for its object to provide improved apparatus for use in connection with the reproor recorded images.
  • a television system of the type in which signals are obtained in the receiving station and are used to modulate a source of light by a varying electric current In addition to, or instead of using this varying electric current, to modulate the source of light, it may be used to make a permanent record on a gramophone disc.
  • a permanent image-record may be made of the transmitted signals and a visible image may subsequently be reproduced by using the record in a gramophone having an electrical pick-up, the current from which modulates a suitable source of light, in a televison receiver.
  • a disc having a plurality of spirally arranged sets of holes formed in its marginal portion, each set of said holes efiecting one complete traversal of the reconstituted image.
  • the holes may be formed in the marginal portion of the turntable of a gramophone, or they may be formed in the marginal portion of the disc bearing the image record to be reproduced.
  • a disc bearing the image-record to be reproduced is rotated by the turntable 2 of an apparatus resembling an ordinary gramohone.
  • the disc is of less diameterthan the turntable, and thus a marginal ring of the turntable is exposed.
  • a series of spirals of holes 3 is arranged round this marginal portion and constitutes the exploring device.
  • the relative disposition of the holes corresponds to that of the holes in the exploring device which has been used for I'GCOIdlIlQOI transmitting the image, and is such that when the record is once correctly set to give a clear image the setting remains correct to the end of the record.
  • the track of the record disc 1 is engaged by the needle of an electrical pick-u 7 the current from which may be ampli ed and used to modulate the intensity of illumination of a suitable source of light 4.
  • the turntable rotates, the light from the source & passes ture 6 to the eye of an observer (not shown).
  • the reconstituted image may be viewed di rectly, or through a lens.
  • Television apparatus of the kind de scribed comprising a gramophone-like turntable provided integrally with a plurality of series of light transmitting devices, each series being adapted to scan the complete field of vision, a disc of the gramopho-ne type adapted to be supported on said turntable, said disc having variations in light intensity mechanically recorded thereon, means for translating mechanical vibrations derived from the disc record into electrical impulses and means for translating said electrical impulses into variations of light intensity, said two means being adapted to cooperate with the said series of light transmitting devices to produce an image whereof the variations of light intensity constitute a graphical representation, the image being reconstituted a plurality of times for each rotation of the turntable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Microscoopes, Condenser (AREA)
  • Optical Recording Or Reproduction (AREA)
US397983A 1928-10-10 1929-10-07 Television and like apparatus Expired - Lifetime US1869735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29177/28A GB324049A (en) 1928-10-10 1928-10-10 Improvements in or relating to television and like apparatus

Publications (1)

Publication Number Publication Date
US1869735A true US1869735A (en) 1932-08-02

Family

ID=10287358

Family Applications (1)

Application Number Title Priority Date Filing Date
US397983A Expired - Lifetime US1869735A (en) 1928-10-10 1929-10-07 Television and like apparatus

Country Status (4)

Country Link
US (1) US1869735A (en, 2012)
BE (1) BE364358A (en, 2012)
FR (1) FR682972A (en, 2012)
GB (3) GB253957A (en, 2012)

Also Published As

Publication number Publication date
BE364358A (en, 2012)
FR682972A (fr) 1930-06-04
GB326251A (en) 1930-03-10
GB253957A (en) 1926-07-01
GB324049A (en) 1930-01-10

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