GB439328A - Indirectly heated electronic tube - Google Patents

Indirectly heated electronic tube

Info

Publication number
GB439328A
GB439328A GB30958/34A GB3095834A GB439328A GB 439328 A GB439328 A GB 439328A GB 30958/34 A GB30958/34 A GB 30958/34A GB 3095834 A GB3095834 A GB 3095834A GB 439328 A GB439328 A GB 439328A
Authority
GB
United Kingdom
Prior art keywords
tube
insulating tube
oct
leads
emitting surface
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
GB30958/34A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB439328A publication Critical patent/GB439328A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503—Safety buckles
    • A44B11/2526—Safety buckles with an operating lever
    • 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

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

439,328. Discharge apparatus. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Germany. Oct. 29, 1934, No. 30958. Convention date, Oct. 30, 1933. Addition to 421,471. [Class 39 (i)] An indirectly-heated cathode consists of an electron emitting surface 3 produced by the metal vapour process on the mid-portion of an equipotential tube 2 surrounding an insulating tube 1, the ends of the tube being at least partly coated with heat-radiating material 4 such as platinum black or a-colloidal dispersion of graphite, the length of a heating helix 5 being equal to that of the emitting surface 3, and the leads 6, projecting into the tube 1, being of such a diameter that no appreciable heating occurs. In a modification, two helices mounted in openings in an insulating tube, are connected at one end by a U- shaped lead of large diameter, and the insulating tube is closed at that end by a porcelain member. The ratio of the resistance of the leads and the heater should be 1 : 10. Screens as described in the parent Specification may be provided.
GB30958/34A 1933-10-31 1934-10-29 Indirectly heated electronic tube Expired GB439328A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0089095 1933-10-31

Publications (1)

Publication Number Publication Date
GB439328A true GB439328A (en) 1935-12-04

Family

ID=42712436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30958/34A Expired GB439328A (en) 1933-10-31 1934-10-29 Indirectly heated electronic tube

Country Status (2)

Country Link
US (1) US2094657A (en)
GB (1) GB439328A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757106C (en) * 1937-04-01 1953-02-23 Siemens & Halske A G Radiation-cooled heat conductor for regulating very small powers

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589521A (en) * 1952-03-18 Heater
US3125701A (en) * 1964-03-17 Thermionic emitter for high frequency tube apparatus
US2594897A (en) * 1945-09-19 1952-04-29 Bell Telephone Labor Inc Cathode structure for electron discharge tubes
US2490096A (en) * 1946-05-01 1949-12-06 Rothstein Jerome Cathode anticontamination structure
US2872611A (en) * 1953-11-16 1959-02-03 Sylvania Electric Prod Cathode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757106C (en) * 1937-04-01 1953-02-23 Siemens & Halske A G Radiation-cooled heat conductor for regulating very small powers

Also Published As

Publication number Publication date
US2094657A (en) 1937-10-05

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