GB174606A - Improvements in phototelegraphy - Google Patents

Improvements in phototelegraphy

Info

Publication number
GB174606A
GB174606A GB2212/22A GB221222A GB174606A GB 174606 A GB174606 A GB 174606A GB 2212/22 A GB2212/22 A GB 2212/22A GB 221222 A GB221222 A GB 221222A GB 174606 A GB174606 A GB 174606A
Authority
GB
United Kingdom
Prior art keywords
selenium
synchronism
screen
action
motor
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
GB2212/22A
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
Publication of GB174606A publication Critical patent/GB174606A/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
    • H04N5/04—Synchronising

Abstract

174,606. Mihßly, D. von. Feb. 18, 1919, [Convention date]. Copying telegraphs; synchronous movements. -A copying telegraph is synchronized by the action of selenium cells which correct the speed of the motor at the receiving station. Elements of the picture T at the transmitting station are successively projected .on to the selenium cell Sz by known means. The light rays pass through a lens B, which bears one or more opaque marks F corresponding with selenium cells such as E located on the screen K at the receiving station. Elements of the screen K are successively illuminated in correspondence with the action at the transmitting station. If synchronism fails, some element other than F is projected on to the cell E which, being consequently illuminated, acts to apply the brake MF to the motor M11. Synchronism is coarsely preserved by the governors 51, 511, which control the shunt resistances 41, 411, of the motors M1, M11.
GB2212/22A 1919-02-18 1922-01-25 Improvements in phototelegraphy Expired GB174606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU174606X 1919-02-18

Publications (1)

Publication Number Publication Date
GB174606A true GB174606A (en) 1923-05-25

Family

ID=10977864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2212/22A Expired GB174606A (en) 1919-02-18 1922-01-25 Improvements in phototelegraphy

Country Status (2)

Country Link
FR (1) FR546714A (en)
GB (1) GB174606A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543066A (en) * 1947-02-01 1951-02-27 Farnsworth Res Corp Automatic picture phasing circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543066A (en) * 1947-02-01 1951-02-27 Farnsworth Res Corp Automatic picture phasing circuit

Also Published As

Publication number Publication date
FR546714A (en) 1922-11-22

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