GB249021A - Improvements in and connected with methods of and means for the telegraphic transmission of pictures, diagrams and other impressions - Google Patents

Improvements in and connected with methods of and means for the telegraphic transmission of pictures, diagrams and other impressions

Info

Publication number
GB249021A
GB249021A GB22777/24A GB2977724A GB249021A GB 249021 A GB249021 A GB 249021A GB 22777/24 A GB22777/24 A GB 22777/24A GB 2977724 A GB2977724 A GB 2977724A GB 249021 A GB249021 A GB 249021A
Authority
GB
United Kingdom
Prior art keywords
light
lamp
lamps
picture
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
Application number
GB22777/24A
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
Priority to GB22777/24A priority Critical patent/GB249021A/en
Priority to US74591A priority patent/US1692232A/en
Priority to FR609196D priority patent/FR609196A/en
Publication of GB249021A publication Critical patent/GB249021A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
    • H04N1/036—Details of scanning heads ; Means for illuminating the original for picture information reproduction for optical reproduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

249,021. Baker, T., Thorne-. Dec. 11, 1924. Copying-telegraphs.- Light reflected from successive elemental areas of the picture or like at the transmitting station is incident on a light-sensitive cell, the varying current is transmitted to the receiving station where it produces corresponding variations in the intensity of a source of light arranged to illuminate successive elemental areas of a photographic reproducing surface, and means are provided for effecting the exploring movements at the two stations in synchronism. In the transmitter, Fig. 1, the picture wrapped around a rotary cylinder a reflects light emitted from a source f and concentrated by a lens c to a prism d which reflects it on to the light-sensitive cell e. In the receiver, Fig. 2, the current passes through lamps f, f<1> in parallel mounted in a casing g directing a spot of light on to the photographic surface wrapped around a rotary cylinder a. Normally the lamp f is in use, the lamp f<1> being masked by a pivoted shutter h which is moved by gravity to unmask the lamp f<1> upon deenergization of a magnet j in the event of failure of the lamp f. To obtain more brilliant illumination the lamps may be subjected to a current which would over-run them but for the variations due to the transmission. The cell e at the transmitting station may be arranged to act as a variable grid leak in connection with a thermionic valve for wireless transmission, the lamps at the receiving station being controlled by connection with the plate circuit of a receiving valve. The exploring movements are preferably effected as described in Specification 248,837 and synchronism may be maintained as described in Specification 249,020. According to the Provisional Specification the picture at the transmitting station may be explored simultaneously by two or more light-sensitive cells to accelerate the transmission.
GB22777/24A 1924-12-11 1924-12-11 Improvements in and connected with methods of and means for the telegraphic transmission of pictures, diagrams and other impressions Expired GB249021A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB22777/24A GB249021A (en) 1924-12-11 1924-12-11 Improvements in and connected with methods of and means for the telegraphic transmission of pictures, diagrams and other impressions
US74591A US1692232A (en) 1924-12-11 1925-12-10 Picture-transmission system
FR609196D FR609196A (en) 1924-12-11 1925-12-10 Telegraphic transmission of images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22777/24A GB249021A (en) 1924-12-11 1924-12-11 Improvements in and connected with methods of and means for the telegraphic transmission of pictures, diagrams and other impressions

Publications (1)

Publication Number Publication Date
GB249021A true GB249021A (en) 1926-03-11

Family

ID=31898271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22777/24A Expired GB249021A (en) 1924-12-11 1924-12-11 Improvements in and connected with methods of and means for the telegraphic transmission of pictures, diagrams and other impressions

Country Status (3)

Country Link
US (1) US1692232A (en)
FR (1) FR609196A (en)
GB (1) GB249021A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790249A (en) * 1969-10-02 1974-02-05 Richards Mfg Co Illuminating means for operating microscope

Also Published As

Publication number Publication date
US1692232A (en) 1928-11-20
FR609196A (en) 1926-08-10

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