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US1771360A - Electromagnetic apparatus for the transmission of images - Google Patents

Electromagnetic apparatus for the transmission of images Download PDF

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Publication number
US1771360A
US1771360A US248924A US24892428A US1771360A US 1771360 A US1771360 A US 1771360A US 248924 A US248924 A US 248924A US 24892428 A US24892428 A US 24892428A US 1771360 A US1771360 A US 1771360A
Authority
US
United States
Prior art keywords
bands
images
poles
steel
transmission
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
US248924A
Other languages
English (en)
Inventor
Thurm Leon
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1771360A publication Critical patent/US1771360A/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
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/781—Television signal recording using magnetic recording on disks or drums

Definitions

  • sucraolmmlurc APPARATUS roa was rmnsussiou or Iwmzs Filed Jan. 23, 1928 2 Sheets-Shut l x K ⁇ I 3 IIVIEIYT'OR.
  • the present invention relates to an electromagnetic apparatus for the transmission of images at a distance. Hitherto the radio trar'ls'sr'nission ofstationary or moving images required the use of apparatus of, a complicated nature which cannot be employed by radio amateurs. a
  • Myinvention obviates such drawbacks by the use of an apparatus whereby images may be sent by a transmitting station and received by a receiving station of any known type.
  • the said apparatus consists essentially oi a plurality of steel bands preferably wound in a spiral.
  • Each spiral band travels between the poles of an electromagnet carrying a current which is modulated by a photo-electric cell and is suitably amplified; said bands serve for the magnetic recording of the more or less illuminated points composing the moving picture to be transmitted. Since each photoelectric cell explores only a part of the image, the number of such bands is made equal to the number of cells, which number will vary with the sensitivenessof the cells.
  • Fig. 1 shows the method of making the record upon the steel bands at-the transmitting station, and also the connections between the electro-magnets and the optical device at the receiving station.
  • Fig. 2 shows a steel band wound in a spiral to reduce the size and held therein by a suitable substance so as to form a disk.
  • Fig. 3 is a sectional view of Fig. 2,
  • Fig. 4 shows the section of a disk in which the steel band extends on both sides so as to form a double-faced disk, so that only half the number of disks need be used.
  • Fig. 5 is a view on a largerscale showing a part of disk in which the band on each side travels between the poles of an electromagnet.
  • Fig. 6 shows a known transmitting station in which the microphone is replaced by an electromagnet.
  • Fig. 7 is an analogous View of a receiving station in which the telephone is replaced by an electromagnet.
  • 1 represents the photo-electric cells or bulbs, these being connected to amplifiers 2 which have the electromagnets 3 connected to their output ends. Between the poles of the said magnets are caused to travel the steel bands 4 disposed in spiral form in the disks 4 of a suitable substance. The several disks are mounted on a common shaft 5 by which they are rotated at the same time.
  • Each of the a electric circuits comprising the n photo-electric cells or bulbsproceeds into a suitable amplifying system.
  • Thecurrents, properly amplified, proceed when issuing from the amplifiers into n electromagnets which form magnetic records u on n steel bands which travel continuously et-ween the poles of the said magnets.
  • steel bands are then caused to travel successively in a given order and at the proper. speed between the poles of an electromagnet V which is substituted for the microphone in a transmitting station, known per se.
  • the steel bands thus modulate waves produced-by the said transmitting station in the same manner as a microphone transmitter.
  • the waves sent out by the said station are received by a receiving station which may be of any usual type, and in which thetelephone receiver or the loud speaker is replaced by an electromagnet.
  • This latter forms a record upon a set of n steel bands traveling through its poles in concordance with'the like set of bands at the transmitting end, and at about the same speed.
  • the steel bands at the receiving end After the steel bands at the receiving end have thus received the record, they are disposed, in the order corresponding to the order employed at the transmitting end, between the poles of n electromagnets, and are made to travel at the same time and at the proper s eed between the poles of said magnets.
  • Eac of the said electromagnets is connected to a suitable amplifying system and variesthe electric currents flowing therein, due to the record on the steel band.
  • Such currents when thus properly amplified, will vary the luminous intensity of a suitable optical combination, comprising for instance neon lamps.
  • I may employ as many neon lamps as there are photo-electric cells in the photoelectric retina acted upon by the moving image to be transmitted.
  • V The said neon lamps by a movement analogous to tie movement by which the photo-electric cells are enabled to explore the image, will thus act upon a screen on which the transmitted image is reproduced.
  • the transmitted image may be reproduced as often as desired. After the record has been efi'aced by suitable means, the bands are ready for a new record.
  • the steel bands are wound in a spiral coil and are held in this shape b a suitable substance; the bands may extend 'rom this substance on e used for this either side, so'that the record can be made on" system, sin ce a multiplex device at the transmitting and the receiving ends, by the multiple modulation of one or more sets of waves, or simply by waves of different lengths.
  • the said wires, bands or disks can thus be employed for the reproduction of ima es as well as sounds, as may be desired, and thus provide a repeating apparatus for images or sounds on the radio principle.
  • the several constructional parts of the said apparatus can be replaced by other parts having like functions and producing the same re sults.
  • a disk I may employ a steel cylinder or endless steel ribbon.
  • An apparatus for the transmission of images comprisin a photo-electric retina consisting of a p urality of photo-electric cells disposed in electric circuits, said cells being adapted to explore simultaneously the luminous points of an image, a plurality ofv lot In testimony whereof he has afiixed his signature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Optical Recording Or Reproduction (AREA)
US248924A 1927-02-05 1928-01-23 Electromagnetic apparatus for the transmission of images Expired - Lifetime US1771360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR595369X 1927-02-05

Publications (1)

Publication Number Publication Date
US1771360A true US1771360A (en) 1930-07-22

Family

ID=8966801

Family Applications (1)

Application Number Title Priority Date Filing Date
US248924A Expired - Lifetime US1771360A (en) 1927-02-05 1928-01-23 Electromagnetic apparatus for the transmission of images

Country Status (6)

Country Link
US (1) US1771360A (fr)
BE (1) BE348203A (fr)
DE (1) DE595369C (fr)
FR (3) FR640115A (fr)
GB (1) GB284717A (fr)
NL (1) NL24600C (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517265A (en) * 1947-07-18 1950-08-01 Wald George Multichannel television system
US2517808A (en) * 1948-12-22 1950-08-08 Rca Corp Image recording and reproducing apparatus
US2690473A (en) * 1949-07-16 1954-09-28 Times Facsimile Corp Facsimile recording system and apparatus
US2695331A (en) * 1952-02-18 1954-11-23 John T Mullin System for stabilizing reproducers of television signals
US2794066A (en) * 1950-11-14 1957-05-28 Minnesota Mining & Mfg System for recording and reproducing television signals
US2839601A (en) * 1950-09-27 1958-06-17 Julius Cato Vredenburg Inglesb Methods of and apparatus for rendering visible magnetic and electric field patterns
US2867685A (en) * 1952-02-18 1959-01-06 Minnesota Mining & Mfg Television recording and reproducing system
US2894064A (en) * 1958-03-11 1959-07-07 Digital Control Systems Inc High speed facsimile transmission systems
US2907819A (en) * 1954-06-24 1959-10-06 Philips Corp Device for the magnetic recording and/or reproduction of television signals
US2907818A (en) * 1951-07-23 1959-10-06 Minnesota Mining & Mfg Magnetic recording of television signals
US2947809A (en) * 1952-02-29 1960-08-02 Karolus August Magnetic picture recording
US4270150A (en) * 1977-01-28 1981-05-26 Ampex Corporation Video frame storage recording and reproducing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE950560C (de) * 1952-02-29 1956-10-11 Dr August Karolus Vorrichtung zur magnetischen Bildaufzeichnung
US5431491A (en) * 1993-10-12 1995-07-11 Despatch Industries Insertion and ejection apparatus for environmental test chambers

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517265A (en) * 1947-07-18 1950-08-01 Wald George Multichannel television system
US2517808A (en) * 1948-12-22 1950-08-08 Rca Corp Image recording and reproducing apparatus
US2690473A (en) * 1949-07-16 1954-09-28 Times Facsimile Corp Facsimile recording system and apparatus
US2839601A (en) * 1950-09-27 1958-06-17 Julius Cato Vredenburg Inglesb Methods of and apparatus for rendering visible magnetic and electric field patterns
US2794066A (en) * 1950-11-14 1957-05-28 Minnesota Mining & Mfg System for recording and reproducing television signals
US2907818A (en) * 1951-07-23 1959-10-06 Minnesota Mining & Mfg Magnetic recording of television signals
US2695331A (en) * 1952-02-18 1954-11-23 John T Mullin System for stabilizing reproducers of television signals
US2867685A (en) * 1952-02-18 1959-01-06 Minnesota Mining & Mfg Television recording and reproducing system
US2947809A (en) * 1952-02-29 1960-08-02 Karolus August Magnetic picture recording
US2907819A (en) * 1954-06-24 1959-10-06 Philips Corp Device for the magnetic recording and/or reproduction of television signals
US2894064A (en) * 1958-03-11 1959-07-07 Digital Control Systems Inc High speed facsimile transmission systems
US4270150A (en) * 1977-01-28 1981-05-26 Ampex Corporation Video frame storage recording and reproducing apparatus

Also Published As

Publication number Publication date
NL24600C (fr)
FR33683E (fr) 1928-11-29
BE348203A (fr)
FR35073E (fr) 1929-12-10
FR640115A (fr) 1928-07-06
GB284717A (en) 1928-10-18
DE595369C (de) 1934-04-11

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