GB386849A - Improvements in and relating to television systems - Google Patents

Improvements in and relating to television systems

Info

Publication number
GB386849A
GB386849A GB13301/32A GB1330132A GB386849A GB 386849 A GB386849 A GB 386849A GB 13301/32 A GB13301/32 A GB 13301/32A GB 1330132 A GB1330132 A GB 1330132A GB 386849 A GB386849 A GB 386849A
Authority
GB
United Kingdom
Prior art keywords
frequency
receiver
transmitter
line
television
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
GB13301/32A
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 GB386849A publication Critical patent/GB386849A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Abstract

386,849. Television. LOEWE, S., 10, Wiesenweg, Steglitz, and ARDENNE, M. VON, 19, Jungfernstieg, Lichterfelde, both in Berlin. May 9, 1932, No. 13301. Convention date, May 9, 1931. [Classes 40 (iii) and 40 (v).] In a television system wherein the picture &c. is scanned line by line, the lower frequency band resulting from the image repetition is transmitted along wires 3, while the higher frequency band resulting from the line scanning and picture details is transmitted over a high-frequency carrier wave, preferably an ultra-short wave. In the arrangement shown in Fig. 3, the higher frequencies are conveyed by lines 6 from the television transmitter 4 to the high-frequency transmitter 1, while corresponding elements are arranged at the receiver, namely, the high-frequency receiver 2, the television receiver 5, and connecting lines 7 therebetween. A line 3, preferably with an earth return, serves for the transmission of the potential which controls the image frequency, e.g. a saw-tooth or tilting potential applied to one pair of plates of a Braun tube, a high resistance 14 or equivalent safety device being inserted to avoid accidents due to short-circuiting &c., particularly in the case of a number of receivers being supplied. The system may also include a telephone transmitter 8 and receiver 9, the sound frequencies being modulated on to the high-frequency carrier wave, preferably with a suitable filter arranged before the transmitter 1. The receiver includes a high-frequency amplifier for dealing with the picture frequencies and a low frequency amplifier for dealing with the sound and image control frequencies, an additional filter preferably being inserted before the loud-speaker. In a modified arrangement, Fig. 2, lines 10, 11 are arranged at the transmitter for the separate modulation on to the carrier wave of the line frequency band and picture currents, corresponding lines 12, 13 being provided at the receiver. Specification 383,880 is referred to.
GB13301/32A 1931-05-09 1932-05-09 Improvements in and relating to television systems Expired GB386849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE386849X 1931-05-09

Publications (1)

Publication Number Publication Date
GB386849A true GB386849A (en) 1933-01-26

Family

ID=6371031

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13301/32A Expired GB386849A (en) 1931-05-09 1932-05-09 Improvements in and relating to television systems

Country Status (1)

Country Link
GB (1) GB386849A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510046A (en) * 1947-04-18 1950-05-30 Zenith Radio Corp Radio-wire signaling system
US2517265A (en) * 1947-07-18 1950-08-01 Wald George Multichannel television system
US2570209A (en) * 1948-05-01 1951-10-09 Zenith Radio Corp Television program metering system
US2649498A (en) * 1949-03-03 1953-08-18 Zenith Radio Corp Blanking arrangement for subscription television receivers
US2656406A (en) * 1948-07-02 1953-10-20 Zenith Radio Corp Subscriber television system
US2656405A (en) * 1948-06-28 1953-10-20 Zenith Radio Corp Air key subscriber television system
US2656407A (en) * 1949-02-12 1953-10-20 Zenith Radio Corp Subscriber signaling system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510046A (en) * 1947-04-18 1950-05-30 Zenith Radio Corp Radio-wire signaling system
US2517265A (en) * 1947-07-18 1950-08-01 Wald George Multichannel television system
US2570209A (en) * 1948-05-01 1951-10-09 Zenith Radio Corp Television program metering system
US2656405A (en) * 1948-06-28 1953-10-20 Zenith Radio Corp Air key subscriber television system
US2656406A (en) * 1948-07-02 1953-10-20 Zenith Radio Corp Subscriber television system
US2656408A (en) * 1948-07-02 1953-10-20 Zenith Radio Corp Subscriber signaling system
US2656407A (en) * 1949-02-12 1953-10-20 Zenith Radio Corp Subscriber signaling system
US2649498A (en) * 1949-03-03 1953-08-18 Zenith Radio Corp Blanking arrangement for subscription television receivers

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