GB676817A - Improvements in or relating to television pick-up tubes - Google Patents

Improvements in or relating to television pick-up tubes

Info

Publication number
GB676817A
GB676817A GB208350A GB208350A GB676817A GB 676817 A GB676817 A GB 676817A GB 208350 A GB208350 A GB 208350A GB 208350 A GB208350 A GB 208350A GB 676817 A GB676817 A GB 676817A
Authority
GB
United Kingdom
Prior art keywords
photo
electrode
sensitive surface
jan
lamps
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
GB208350A
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.)
GEORGE STANLEY PERCIVAL FREEMA
Cinema Television Ltd
Original Assignee
GEORGE STANLEY PERCIVAL FREEMA
Cinema Television 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 GEORGE STANLEY PERCIVAL FREEMA, Cinema Television Ltd filed Critical GEORGE STANLEY PERCIVAL FREEMA
Priority to GB208350A priority Critical patent/GB676817A/en
Priority to FR1030886D priority patent/FR1030886A/en
Priority to DEC3690A priority patent/DE884823C/en
Publication of GB676817A publication Critical patent/GB676817A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube

Landscapes

  • Transforming Electric Information Into Light Information (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

676,817. Cathode-ray tubes. CINEMATELEVISION, Ltd., and FREEMAN, G. S. P. Jan. 25, 1951 (Jan. 26, 1950], No. 2083/50. Class 39 (i). The target electrode 2 of an image iconoscope 1 is flooded with low velocity photo-electrons from a photo-sensitive surface 5 separate from the main photo-sensitive cathode 3 with an electron permeable electrode or electrode in close proximity thereto. This surface 5 in the form of a coating overlies and is insulated from the wall anode and is in two or more portions, and the electron permeable electrode 6 is electrically connected to the wall anode. A ring of lamps is disposed outside the tube with individual or group control of brightness, and the various sections of the photo-sensitive surface are connected to individually variable potentials to give a masking effect or to compensate for brightness variation in the lamps. The photo-sensitive surface is at a potential of up to ten volts negative with respect to the final wall anode.
GB208350A 1950-01-26 1950-01-26 Improvements in or relating to television pick-up tubes Expired GB676817A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB208350A GB676817A (en) 1950-01-26 1950-01-26 Improvements in or relating to television pick-up tubes
FR1030886D FR1030886A (en) 1950-01-26 1951-01-11 Improvements to television analyzer tubes or the like
DEC3690A DE884823C (en) 1950-01-26 1951-01-20 Image decomposition tube with storage electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB208350A GB676817A (en) 1950-01-26 1950-01-26 Improvements in or relating to television pick-up tubes

Publications (1)

Publication Number Publication Date
GB676817A true GB676817A (en) 1952-08-06

Family

ID=9733281

Family Applications (1)

Application Number Title Priority Date Filing Date
GB208350A Expired GB676817A (en) 1950-01-26 1950-01-26 Improvements in or relating to television pick-up tubes

Country Status (3)

Country Link
DE (1) DE884823C (en)
FR (1) FR1030886A (en)
GB (1) GB676817A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE521216A (en) * 1952-07-05
DE948614C (en) * 1952-11-25 1956-09-06 Fernseh Gmbh Image storage tubes in which the storage electrode is sprinkled with slow electrons
DE1173513B (en) * 1962-07-28 1964-07-09 Fernseh Gmbh Method and arrangement for recording television images with storage tubes

Also Published As

Publication number Publication date
FR1030886A (en) 1953-06-17
DE884823C (en) 1953-07-30

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