GB474591A - Dielectric member more particularly for use in television transmitters - Google Patents
Dielectric member more particularly for use in television transmittersInfo
- 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
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.
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)
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)
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 |
-
0
- NL NL49655D patent/NL49655C/xx active
-
1936
- 1936-08-27 US US98144A patent/US2173923A/en not_active Expired - Lifetime
-
1937
- 1937-06-25 GB GB17724/37A patent/GB474591A/en not_active Expired
- 1937-08-25 FR FR831049D patent/FR831049A/en not_active Expired
- 1937-08-28 DE DE1937I0058955 patent/DE700870C/en not_active Expired
Cited By (1)
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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