GB357144A - Improvements in and relating to photo-telegraphy and the like - Google Patents

Improvements in and relating to photo-telegraphy and the like

Info

Publication number
GB357144A
GB357144A GB1835930A GB1835930A GB357144A GB 357144 A GB357144 A GB 357144A GB 1835930 A GB1835930 A GB 1835930A GB 1835930 A GB1835930 A GB 1835930A GB 357144 A GB357144 A GB 357144A
Authority
GB
United Kingdom
Prior art keywords
drum
picture
telegraphy
adjusted
gearing
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
GB1835930A
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 GB1835930A priority Critical patent/GB357144A/en
Priority to FR718664D priority patent/FR718664A/en
Publication of GB357144A publication Critical patent/GB357144A/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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/17—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa the scanning speed being dependent on content of picture

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

357,144. Copying-telegraphy. HARRIES, J. H. O., Shirley, Old Road, Frinton-on-Sea. June 16, 1930, No. 18359. [Class 40 (iii).] In copying telegraphy, the centre of interest of the picture is scanned more finely than the remainder. The picture drum 1, Fig. 1, is rotated and the scanning device 2 is traversed by a lead screw of which the centre portion 4 has a finer thread that the outer portion 3. Gearing 5, 6 allows the lead screw to be adjusted so that the finely-scanned area may be adjusted over the picture. The drum 1, Figs. 2 and 3, is driven by an eccentric cam 10 driven by a pinion 8 from a constantly-rotating gear 9. This arrangement allows the drum to be more slowly rotated over one portion. Adjustment of the position of the pinion 8 is effected by gearing 13, 14. In order to adjust the scanning spot, an iris diaphragm 15, Fig. 4, is closed or opened under the action of a cam arm 17 moving in a cam slot 19, so that the beam of light 16 is suitably adjusted. Specification 357,143 is referred to.
GB1835930A 1930-06-16 1930-06-16 Improvements in and relating to photo-telegraphy and the like Expired GB357144A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1835930A GB357144A (en) 1930-06-16 1930-06-16 Improvements in and relating to photo-telegraphy and the like
FR718664D FR718664A (en) 1930-06-16 1931-06-15 Improvements in photo-telegraphy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1835930A GB357144A (en) 1930-06-16 1930-06-16 Improvements in and relating to photo-telegraphy and the like

Publications (1)

Publication Number Publication Date
GB357144A true GB357144A (en) 1931-09-16

Family

ID=10111101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1835930A Expired GB357144A (en) 1930-06-16 1930-06-16 Improvements in and relating to photo-telegraphy and the like

Country Status (2)

Country Link
FR (1) FR718664A (en)
GB (1) GB357144A (en)

Also Published As

Publication number Publication date
FR718664A (en) 1932-01-27

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