GB514758A - Improvements in and relating to electric discharge devices - Google Patents

Improvements in and relating to electric discharge devices

Info

Publication number
GB514758A
GB514758A GB1654438A GB1654438A GB514758A GB 514758 A GB514758 A GB 514758A GB 1654438 A GB1654438 A GB 1654438A GB 1654438 A GB1654438 A GB 1654438A GB 514758 A GB514758 A GB 514758A
Authority
GB
United Kingdom
Prior art keywords
bars
frame
filament
electric discharge
tensioned
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
GB1654438A
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.)
DAVID ARTHUR RANKIN
MO Valve Co Ltd
Original Assignee
DAVID ARTHUR RANKIN
MO Valve Co 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 DAVID ARTHUR RANKIN, MO Valve Co Ltd filed Critical DAVID ARTHUR RANKIN
Priority to GB1654438A priority Critical patent/GB514758A/en
Publication of GB514758A publication Critical patent/GB514758A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/18—Supports; Vibration-damping arrangements

Landscapes

  • Discharge Lamp (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

514,758. Thermionic cathodes. M-0 VALVE CO., Ltd., and RANKIN, D. A. June 2, 1938, No. 16544. [Class 39 (i)] The filamentary cathode 1 of an electric discharge device is threaded through the gaps between two or more cross bars 3, 4, 5, of an insulating frame 2 and tensioned so that it is drawn against opposite sides of adjacent cross bars. In the Fig. the hair pin filament 1 is tensioned by a spring 6 at the light and pulled against the front of the bars 3 and 5 and the back of the bar 4. The side bars at the upper end of the mica frame 2 enter slots 7 in the mica plate 8. The limbs of a V or W or other shaped filament may be threaded in opposite senses. The bars are as small as is consistent with rigidity, and the frame need not be supported otherwise than by the filament. The Provisional Specification states that the frame may be rigidly secured to electrode supports or held within slots on grooves in an electrode. Specifications 372,758 and 477,787 are referred to.
GB1654438A 1938-06-02 1938-06-02 Improvements in and relating to electric discharge devices Expired GB514758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1654438A GB514758A (en) 1938-06-02 1938-06-02 Improvements in and relating to electric discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1654438A GB514758A (en) 1938-06-02 1938-06-02 Improvements in and relating to electric discharge devices

Publications (1)

Publication Number Publication Date
GB514758A true GB514758A (en) 1939-11-16

Family

ID=10079222

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1654438A Expired GB514758A (en) 1938-06-02 1938-06-02 Improvements in and relating to electric discharge devices

Country Status (1)

Country Link
GB (1) GB514758A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496530A (en) * 1946-04-01 1950-02-07 Hivac Ltd Cathode for thermionic tubes
US2527166A (en) * 1948-08-02 1950-10-24 Bell Telephone Labor Inc Electrode assembly for electron discharge devices
US2707771A (en) * 1946-07-05 1955-05-03 Sylvania Electric Prod Electron discharge device of the dynatron oscillator type

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496530A (en) * 1946-04-01 1950-02-07 Hivac Ltd Cathode for thermionic tubes
US2707771A (en) * 1946-07-05 1955-05-03 Sylvania Electric Prod Electron discharge device of the dynatron oscillator type
US2527166A (en) * 1948-08-02 1950-10-24 Bell Telephone Labor Inc Electrode assembly for electron discharge devices

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