GB474591A - Dielectric member more particularly for use in television transmitters - Google Patents

Dielectric member more particularly for use in television transmitters

Info

Publication number
GB474591A
GB474591A GB17724/37A GB1772437A GB474591A GB 474591 A GB474591 A GB 474591A GB 17724/37 A GB17724/37 A GB 17724/37A GB 1772437 A GB1772437 A GB 1772437A GB 474591 A GB474591 A GB 474591A
Authority
GB
United Kingdom
Prior art keywords
glass
acid
centre
mixture
silver chloride
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
GB17724/37A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB474591A publication Critical patent/GB474591A/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
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • H01J29/43—Charge-storage screens using photo-emissive mosaic, e.g. for orthicon, for iconoscope
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate

Landscapes

  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Surface Treatment Of Glass (AREA)
  • Glass Compositions (AREA)

Abstract

474,591. Glass manufacture. STANDARD TELEPHONES & CABLES, Ltd. June 25, 1937, No. 17724. Convention date, Aug. 27, 1936. [Class 56] [Also in Groups XL, XVI, and XXXVI] A dielectric element for use in a condenser, as an insulating support for material which emits secondary electrons or as the base plate of a mosaic screen in a cathode-ray tube, is formed of glass the centre 21 of which has been etched away until it is very thin but supported by the thicker edge or border 22. To form the plate a sheet of glass has its edge coated with beeswax and the centre treated' with hydrofluoric acid either on both sides or only on one side ; the treatment may be effected in stages 'with acid of varying concentration. A mixture of hydrofluoric acid, sulphuric acid and water may be used as the etching means with silver chloride or a mixture of silver chloride and iodide as the resist.
GB17724/37A 1936-08-27 1937-06-25 Dielectric member more particularly for use in television transmitters Expired GB474591A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US98144A US2173923A (en) 1936-08-27 1936-08-27 Cathode ray tube

Publications (1)

Publication Number Publication Date
GB474591A true GB474591A (en) 1937-11-03

Family

ID=22267464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17724/37A Expired GB474591A (en) 1936-08-27 1937-06-25 Dielectric member more particularly for use in television transmitters

Country Status (5)

Country Link
US (1) US2173923A (en)
DE (1) DE700870C (en)
FR (1) FR831049A (en)
GB (1) GB474591A (en)
NL (1) NL49655C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743019C (en) * 1939-04-03 1943-12-16 Philips Patentverwaltung Single-sided photoelectric mosaic screen for storing picture transmission tubes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474988A (en) * 1943-08-30 1949-07-05 Sargrove John Adolph Method of manufacturing electrical network circuits
US2504972A (en) * 1946-04-29 1950-04-25 Farnsworth Res Corp Picture and sound transmitter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743019C (en) * 1939-04-03 1943-12-16 Philips Patentverwaltung Single-sided photoelectric mosaic screen for storing picture transmission tubes

Also Published As

Publication number Publication date
FR831049A (en) 1938-08-18
NL49655C (en)
US2173923A (en) 1939-09-26
DE700870C (en) 1941-01-02

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