GB724202A - Improvements relating to the production of light absorbent surfaces in electron discharge devices - Google Patents

Improvements relating to the production of light absorbent surfaces in electron discharge devices

Info

Publication number
GB724202A
GB724202A GB2266/52A GB226652A GB724202A GB 724202 A GB724202 A GB 724202A GB 2266/52 A GB2266/52 A GB 2266/52A GB 226652 A GB226652 A GB 226652A GB 724202 A GB724202 A GB 724202A
Authority
GB
United Kingdom
Prior art keywords
substance
exposed
tube
alkali metal
lead
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
GB2266/52A
Inventor
Harry Cassman
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2266/52A priority Critical patent/GB724202A/en
Priority to US333528A priority patent/US2843774A/en
Priority to FR1070158D priority patent/FR1070158A/en
Publication of GB724202A publication Critical patent/GB724202A/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
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

724,202. Electrode materials and processing. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Jan. 16, 1953 [Jan. 28, 1952], No. 2266/52. Class 39 (1). An electron discharge device which includes a photo-electrically sensitive surface and a further surface liable to reflect unwanted light on the sensitive surface, is characterized in that the further surface is provided with a light absorbing coating comprising alkali metal and a substance which blackens when exposed to the alkali metal; the substance is preferably lead, but may be tin, germanium or silicon. In one embodiment the ion trap mesh 5 of a c.p.s. television pick-up tube is coated with lead 7 to a thickness of about 1000 A.U. by evaporation; during the sensitization of the mosaic 1 caesium is admitted to the tube in the normal way, and the lead coating is thus exposed to caesium. Other meshes mounted in front of the target of a television pick-up tube, e.g. a stabilizing mesh, may be treated in the same way, and the invention may also be applied to photo-electric cells. According to the Provisional Specification antimony or bismuth may be used for the substance which blackens when exposed to an alkali metal.
GB2266/52A 1952-01-28 1952-01-28 Improvements relating to the production of light absorbent surfaces in electron discharge devices Expired GB724202A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2266/52A GB724202A (en) 1952-01-28 1952-01-28 Improvements relating to the production of light absorbent surfaces in electron discharge devices
US333528A US2843774A (en) 1952-01-28 1953-01-27 Light absorbent surfaces
FR1070158D FR1070158A (en) 1952-01-28 1953-01-28 Light absorbing surface manufacturing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2266/52A GB724202A (en) 1952-01-28 1952-01-28 Improvements relating to the production of light absorbent surfaces in electron discharge devices

Publications (1)

Publication Number Publication Date
GB724202A true GB724202A (en) 1955-02-16

Family

ID=9736539

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2266/52A Expired GB724202A (en) 1952-01-28 1952-01-28 Improvements relating to the production of light absorbent surfaces in electron discharge devices

Country Status (3)

Country Link
US (1) US2843774A (en)
FR (1) FR1070158A (en)
GB (1) GB724202A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188506A (en) * 1959-11-23 1965-06-08 Machlett Lab Inc Cathode ray tube with signal plate connected to contact ring having envelope diameter
US3268764A (en) * 1963-01-09 1966-08-23 Westinghouse Electric Corp Radiation sensitive device
US3400015A (en) * 1963-03-22 1968-09-03 Texas Instruments Inc Energy converter
US3402074A (en) * 1963-03-22 1968-09-17 Texas Instruments Inc Energy converter
US4509824A (en) * 1982-02-01 1985-04-09 Nippon Sheet Glass Co., Ltd. Plate lens and a method for manufacturing the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495042A (en) * 1947-11-12 1950-01-17 Remington Rand Inc Two-sided mosaic and method of manufacturing same

Also Published As

Publication number Publication date
FR1070158A (en) 1954-07-20
US2843774A (en) 1958-07-15

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