GB582892A - Apparatus for controlling the velocity of a cathode ray beam - Google Patents

Apparatus for controlling the velocity of a cathode ray beam

Info

Publication number
GB582892A
GB582892A GB1725/44A GB172544A GB582892A GB 582892 A GB582892 A GB 582892A GB 1725/44 A GB1725/44 A GB 1725/44A GB 172544 A GB172544 A GB 172544A GB 582892 A GB582892 A GB 582892A
Authority
GB
United Kingdom
Prior art keywords
circuit
grid
frequency
bias
strands
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
GB1725/44A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB582892A publication Critical patent/GB582892A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/40—Circuit details for pick-up tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/16—Picture reproducers using cathode ray tubes
    • H04N9/22—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information
    • H04N9/24—Picture reproducers using cathode ray tubes using the same beam for more than one primary colour information using means, integral with, or external to, the tube, for producing signal indicating instantaneous beam position

Abstract

582,892. Television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 31, 1944, No. 1725. Convention date, Jan. 30, 1943. [Classes 39 (i), 40 (iii) and 40 (v)] [Also in Group XXXV] A grid 14, Fig. 1, is placed in the path of an electron beam 17 and connected to an external circuit of a television transmission tube so that electric pulsations are produced on the grid or on the picture signals of a frequency depending on the scanning speed of traverse of the electron beam and this frequency is compared in tho circuit with a standard frequency to produce a correcting bias if the frequencies differ, the bias being applied to the scanning circuit to ensure uniform scanning speed. The grid 14 may comprise a single set of strands 18 in front of the usual mosaic 15 ; or, as shown in Fig. 3, the grid may comprise two interlaced sets of strands 79, 81, and a -capacity screen 70 is interposed between the grid and the mosaic 82. The pulsations produced on either of the two sets of strands 79, 81 may be used singly or in combination. In the circuit shown in Fig. 1, the frequency of the produced pulsations is compared with the frequency to which a resonating circuit 38, 39 is tuned, and a difference berween these frequencies causes a double diode combination 46, 47 to produce a voltage bias in one direction or the other between the outer ends of a resistance 43. This bias is fed into the grid circuit of an amplifier 52 in the circuit transmitting the scanning control to the cathode-ray tube.
GB1725/44A 1943-01-30 1944-01-31 Apparatus for controlling the velocity of a cathode ray beam Expired GB582892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US474100A US2385563A (en) 1943-01-30 1943-01-30 Deflection control system

Publications (1)

Publication Number Publication Date
GB582892A true GB582892A (en) 1946-12-02

Family

ID=23882179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1725/44A Expired GB582892A (en) 1943-01-30 1944-01-31 Apparatus for controlling the velocity of a cathode ray beam

Country Status (2)

Country Link
US (1) US2385563A (en)
GB (1) GB582892A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840738A (en) * 1954-05-05 1958-06-24 Westinghouse Electric Corp Color television tube
US2860271A (en) * 1955-06-03 1958-11-11 Sylvania Electric Prod Cathode ray tube
US2967262A (en) * 1956-07-30 1961-01-03 Madey Richard Multi-color display tube

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB641936A (en) * 1946-08-02 1950-08-23 Cinema Television Ltd Improvements in or relating to television systems
US2476698A (en) * 1946-11-05 1949-07-19 Philco Corp Beam-velocity control system for cathode-ray tubes
US2634328A (en) * 1947-06-27 1953-04-07 Rca Corp Television system
US2566698A (en) * 1947-08-28 1951-09-04 Rca Corp Modulation distortion correction
US2611816A (en) * 1948-02-28 1952-09-23 Rca Corp Deflection control system
US2611819A (en) * 1949-02-26 1952-09-23 Rca Corp Television signal control system
US2623196A (en) * 1950-02-28 1952-12-23 Products And Licensing Corp Television apparatus and method for phase-shift scanning
US2594513A (en) * 1950-11-20 1952-04-29 Rca Corp Linearity control sweep circuits
US2762949A (en) * 1951-07-27 1956-09-11 Du Mont Allen B Lab Inc Comparator circuit
US2816231A (en) * 1953-09-29 1957-12-10 High Voltage Engineering Corp Method and apparatus for imparting a scanning movement to a beam of charged particles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840738A (en) * 1954-05-05 1958-06-24 Westinghouse Electric Corp Color television tube
US2860271A (en) * 1955-06-03 1958-11-11 Sylvania Electric Prod Cathode ray tube
US2967262A (en) * 1956-07-30 1961-01-03 Madey Richard Multi-color display tube

Also Published As

Publication number Publication date
US2385563A (en) 1945-09-25

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