GB1115962A - Improvements in or relating to dark trace cathode-ray tubes - Google Patents

Improvements in or relating to dark trace cathode-ray tubes

Info

Publication number
GB1115962A
GB1115962A GB18551/66A GB1855166A GB1115962A GB 1115962 A GB1115962 A GB 1115962A GB 18551/66 A GB18551/66 A GB 18551/66A GB 1855166 A GB1855166 A GB 1855166A GB 1115962 A GB1115962 A GB 1115962A
Authority
GB
United Kingdom
Prior art keywords
mica
tenebrescent
screen
layer
cathode
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
GB18551/66A
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.)
Thomas Electronics Inc
Original Assignee
Thomas Electronics Inc
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 Thomas Electronics Inc filed Critical Thomas Electronics Inc
Publication of GB1115962A publication Critical patent/GB1115962A/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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/14—Screens on or from which an image or pattern is formed, picked up, converted or stored acting by discoloration, e.g. halide screen
    • 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
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/122—Direct viewing storage tubes without storage grid

Abstract

1,115,962. Cathode-ray tubes. THOMAS ELECTRONICS Inc. 27 April, 1966 [27 April, 1965], No.18551/66. Heading H1D. In a dark trace cathode-ray tube having a screen comprising a layer 36 of tenebrescent material, e.g. an alkali halide, on a thin sheet 35 of mica or glass, an annular or toroidal tungsten filament 40 is provided around the periphery of the screen as a source of heat for erasing the opacity centres formed in the tenebrescent layer by the electron beam. Also an aluminium coating 44 is provided on the flared portion of the envelope to reflect and focus the heat radiation, and heat absorbing material 38, e.g. chromium or a nickel-chromium alloy, is provided on the front of the mica or glass sheet 35 or between the tenebrescent layer 36 and the sheet 35 or intermixed with the mica. A green fluorescent lamp 46 is provided as a source of rear lighting for improving the contrast of the image, the lamp illuminating the screen through a window 48 provided in the aluminium coating 44. The intensity of the rear lighting may be varied by means of a mask or mechanical shutter over the window.
GB18551/66A 1965-04-27 1966-04-27 Improvements in or relating to dark trace cathode-ray tubes Expired GB1115962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45114965A 1965-04-27 1965-04-27

Publications (1)

Publication Number Publication Date
GB1115962A true GB1115962A (en) 1968-06-06

Family

ID=23791016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18551/66A Expired GB1115962A (en) 1965-04-27 1966-04-27 Improvements in or relating to dark trace cathode-ray tubes

Country Status (3)

Country Link
US (1) US3447020A (en)
DE (1) DE1564833A1 (en)
GB (1) GB1115962A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715618A (en) * 1969-03-05 1973-02-06 Loral Corp Vidicon viewed storage tube in which the newest line of information is displayed on the uppermost portion of the tube
US3720859A (en) * 1970-05-04 1973-03-13 Dicomed Corp Image display system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836753A (en) * 1942-09-14 1958-05-27 Nat Union Electric Corp Dark trace cathode-ray tubes and screens therefor
US2836754A (en) * 1942-09-14 1958-05-27 Nat Union Electric Corp Dark trace cathode-ray tube and method of manufacture
US2755404A (en) * 1954-03-25 1956-07-17 Nat Union Electric Corp Dark trace cathode-ray tube and method of manufacture
US3148281A (en) * 1961-02-28 1964-09-08 Litton Prec Products Inc Cathode ray storage tube using a dark trace layer and a phosphor layer
US3253497A (en) * 1961-10-30 1966-05-31 Polacoat Inc Information storage device
US3277241A (en) * 1963-06-03 1966-10-04 Raytheon Co Tenebrescent display tube

Also Published As

Publication number Publication date
US3447020A (en) 1969-05-27
DE1564833A1 (en) 1970-01-22

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