GB595260A - Television signal amplifier - Google Patents

Television signal amplifier

Info

Publication number
GB595260A
GB595260A GB24445/44A GB2444544A GB595260A GB 595260 A GB595260 A GB 595260A GB 24445/44 A GB24445/44 A GB 24445/44A GB 2444544 A GB2444544 A GB 2444544A GB 595260 A GB595260 A GB 595260A
Authority
GB
United Kingdom
Prior art keywords
potential
resistor
gain
hence
focus
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
GB24445/44A
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.)
Farnsworth Television and Radio Corp
Original Assignee
Farnsworth Television and Radio Corp
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 Farnsworth Television and Radio Corp filed Critical Farnsworth Television and Radio Corp
Publication of GB595260A publication Critical patent/GB595260A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/42—Image pick-up tubes having an input of visible light and electric output with image screen generating a composite electron beam which is deflected as a whole past a stationary probe to simulate a scanning effect, e.g. Farnsworth pick-up tube
    • H01J31/44—Tubes with image amplification section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/023—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements

Abstract

595,260. Electron multipliers and circuits therefor. FARNSWORTH TELEVISION & RADIO CORPORATION. Dec. 6, 1944, No. 24445. Convention date, April 26, 1943. [Classes 39 (i), 40 (iii) and 40 (v)] The gain of an electron multiplier amplifying the output of a television image dissector tube is varied in accordance with the tube cathode current, and hence the mean brightness of the scene, by applying the potential across a resistor 43 in the cathode circuit to a multiplier electrode 24, to vary its potential, and hence its gain. The potential across resistor 43 is also applied to valve 44 in the focus circuit so that the focus is not affected by variations in anode potential caused by the inclusion of resistor 43.
GB24445/44A 1943-04-26 1944-12-06 Television signal amplifier Expired GB595260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US484583A US2396023A (en) 1943-04-26 1943-04-26 Television signal amplifier

Publications (1)

Publication Number Publication Date
GB595260A true GB595260A (en) 1947-12-01

Family

ID=23924743

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24445/44A Expired GB595260A (en) 1943-04-26 1944-12-06 Television signal amplifier

Country Status (2)

Country Link
US (1) US2396023A (en)
GB (1) GB595260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202988A (en) * 1987-02-13 1988-10-05 Hamamatsu Photonics Kk Photomultiplier

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463038A (en) * 1944-07-06 1949-03-01 Rca Corp Direct current insertion circuit
US2502218A (en) * 1946-12-26 1950-03-28 Rca Corp Facsimile system with regulated power supply
US2774909A (en) * 1951-08-09 1956-12-18 Hartford Nat Bank & Trust Co Television pick-up tube comprising electrostatic electron-optical means
US2878393A (en) * 1955-01-12 1959-03-17 Picker X Ray Corp Waite Mfg X-ray tube with variable focal spot and control means therefor
US2904694A (en) * 1958-01-10 1959-09-15 Gen Precision Lab Inc Exposure control system
NL239261A (en) * 1958-05-20
US3171032A (en) * 1962-03-08 1965-02-23 Control Data Corp Photomultiplier with stabilized gain
US3476197A (en) * 1966-06-23 1969-11-04 Goodyear Aerospace Corp Electron image correlator tube with improved read-out means
FI792752A (en) * 1979-09-05 1981-03-06 Lindblom Karl Peter ADJUSTMENT OF OPERATING OPTICAL EQUIPMENT WITH HOUSING
NL8100600A (en) * 1981-02-09 1982-09-01 Philips Nv TELEVISION CAMERA EQUIPPED WITH A CONTROL CIRCUIT FOR THE ELECTRON BEAM CURRENT STRENGTH AT LEAST ONE RECORDING TUBE.
US4588922A (en) * 1984-03-19 1986-05-13 Rca Corporation Electron discharge device having a thermionic electron control plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2202988A (en) * 1987-02-13 1988-10-05 Hamamatsu Photonics Kk Photomultiplier
US4825066A (en) * 1987-02-13 1989-04-25 Hamamatsu Photonics Kabushiki Kaisha Photomultiplier with secondary electron shielding means
GB2202988B (en) * 1987-02-13 1991-10-23 Hamamatsu Photonics Kk Photomultiplier

Also Published As

Publication number Publication date
US2396023A (en) 1946-03-05

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