GB513640A - Electron discharge devices particularly cathode ray tubes - Google Patents

Electron discharge devices particularly cathode ray tubes

Info

Publication number
GB513640A
GB513640A GB764838A GB764838A GB513640A GB 513640 A GB513640 A GB 513640A GB 764838 A GB764838 A GB 764838A GB 764838 A GB764838 A GB 764838A GB 513640 A GB513640 A GB 513640A
Authority
GB
United Kingdom
Prior art keywords
cathode
electron discharge
cathode ray
ray tubes
discharge devices
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
GB764838A
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
Priority to NL66322D priority Critical patent/NL66322C/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB764838A priority patent/GB513640A/en
Priority to FR849625D priority patent/FR849625A/en
Publication of GB513640A publication Critical patent/GB513640A/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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

513,640. Making cathodes. STANDARD TELEPHONES & CABLES, Ltd., GOOD - CHILD, F. D., BLACK, D. H., and FOULKES, C. H. March 11, 1938, No. 7648. [Class 83 (ii)] [Also in Group XL] An indirectly heated tubular cathode for an electron discharge device is formed by bending back into parallel relation two or more radially extending arms of a sheet metal blank. To obtain a tubular cathode, each arm is curved. In the form shown in Fig. 5, cuts are made in the central part of a star-shaped blank and the tongues' 7 are bent in one direction and the limbs in the other direction to form a cathode as shown in Fig. 6, the tongues serving to support the cathode on a mica bridge 6. In a modification, the ends of the limb are cut and bent to serve for fixing.
GB764838A 1938-03-11 1938-03-11 Electron discharge devices particularly cathode ray tubes Expired GB513640A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL66322D NL66322C (en) 1938-03-11
GB764838A GB513640A (en) 1938-03-11 1938-03-11 Electron discharge devices particularly cathode ray tubes
FR849625D FR849625A (en) 1938-03-11 1939-01-30 Electronic discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB764838A GB513640A (en) 1938-03-11 1938-03-11 Electron discharge devices particularly cathode ray tubes

Publications (1)

Publication Number Publication Date
GB513640A true GB513640A (en) 1939-10-18

Family

ID=9837126

Family Applications (1)

Application Number Title Priority Date Filing Date
GB764838A Expired GB513640A (en) 1938-03-11 1938-03-11 Electron discharge devices particularly cathode ray tubes

Country Status (3)

Country Link
FR (1) FR849625A (en)
GB (1) GB513640A (en)
NL (1) NL66322C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436264A (en) * 1945-06-14 1948-02-17 Kreisler Mfg Corp Jacques Electron gun for cathode-ray tubes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717325A (en) * 1952-04-08 1955-09-06 Int Standard Electric Corp Indirectly heated cathode, for cathode ray tubes in particular

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436264A (en) * 1945-06-14 1948-02-17 Kreisler Mfg Corp Jacques Electron gun for cathode-ray tubes

Also Published As

Publication number Publication date
NL66322C (en)
FR849625A (en) 1939-11-28

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