GB802852A - Improvements in or relating to bifilarly wound filaments for cathodes of electric discharge tubes - Google Patents

Improvements in or relating to bifilarly wound filaments for cathodes of electric discharge tubes

Info

Publication number
GB802852A
GB802852A GB37637/56A GB3763756A GB802852A GB 802852 A GB802852 A GB 802852A GB 37637/56 A GB37637/56 A GB 37637/56A GB 3763756 A GB3763756 A GB 3763756A GB 802852 A GB802852 A GB 802852A
Authority
GB
United Kingdom
Prior art keywords
cathodes
relating
electric discharge
discharge tubes
bifilarly wound
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
GB37637/56A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB802852A publication Critical patent/GB802852A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/22—Heaters

Landscapes

  • Discharge Lamp (AREA)

Abstract

802,852. Electric heaters for cathodes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 10, 1956 [Dec. 13, 1955], No. 37637/56. Class 39(3) [Also in Group XL(a)] A bifilarly wound heater filament 1 has within it an electro-phoretically produced insulating tube 2a and is covered electrophoretically with an insulating coating 4 terminating in a conical or pear-shaped knob 3a. This knob enters partially into the cathode sleeve, thus seating the heater firmly therein. The tube 2a may be made by coating a molybdenum wire 2b with the insulating material (preferably pure aluminium oxide) and dissolving out the wire.
GB37637/56A 1955-12-13 1956-12-10 Improvements in or relating to bifilarly wound filaments for cathodes of electric discharge tubes Expired GB802852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE348752X 1955-12-13

Publications (1)

Publication Number Publication Date
GB802852A true GB802852A (en) 1958-10-15

Family

ID=6257686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37637/56A Expired GB802852A (en) 1955-12-13 1956-12-10 Improvements in or relating to bifilarly wound filaments for cathodes of electric discharge tubes

Country Status (4)

Country Link
BE (1) BE553315A (en)
CH (1) CH348752A (en)
FR (1) FR1162076A (en)
GB (1) GB802852A (en)

Also Published As

Publication number Publication date
BE553315A (en)
FR1162076A (en) 1958-09-09
CH348752A (en) 1960-09-15

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