GB1295607A - - Google Patents

Info

Publication number
GB1295607A
GB1295607A GB1295607DA GB1295607A GB 1295607 A GB1295607 A GB 1295607A GB 1295607D A GB1295607D A GB 1295607DA GB 1295607 A GB1295607 A GB 1295607A
Authority
GB
United Kingdom
Prior art keywords
cathode
conductor
anode
insulating
outer conductor
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
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 filed Critical
Publication of GB1295607A publication Critical patent/GB1295607A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B29/00—Generation of noise currents and voltages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/02—Electron-emitting electrodes; Cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps

Landscapes

  • Plasma Technology (AREA)
  • Amplifiers (AREA)

Abstract

1295607 Thermionic-cathode tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 17 May 1971 [20 May 1970] 15279/71 Heading H1D Apparatus for producing noise signals in high frequency circuits comprises a vacuum diode having a filamentary cathode 5 of an anode 4, and a coaxial line in which the anode is part of the inner conductor 32 and the cathode is coupled for high frequencies to the outer conductor 33. The cathode of thoriated W is supported within the concentric stainless steel anode 4 at one end by means of a fixed connecting pin 2 and at the other end by means of a slidable contact portion 8 connected by tension spring 9 to connection pin 17. The ends of anode 4 are connected to coaxial insulating cylinders 3 and 6 respectively and the outer ends of the insulating cylinders are connected to conducting cylinders 1 and 7 respectively. Slidable contact portion 8 is provided with holes 15 for the purpose of evacuation and an Al coating to make electrical contact with cylinder 7 and to prevent sticking under vacuum. The anode has an outer screw thread 19 which engages a corresponding thread provided in an aperture in stainless steel inner coaxial conductor 32. One end of cathode 5 is conductively connected via cylinder 7 to electrode 38 which is secured by insulating bolts 39 to outer conductor 33 and separated from conductor 33 by an insulating foil 40 to provide a capacitative coupling between the cathode and the outer conductor. The other end of cathode 5 is similarly capacitatively coupled to the outer conductor by means of resilient contact sleeve 41 of phosphor bronze and electrode 42. A voltage of 70-150 volts is connected to inner conductor 32 and a supply of 1-2 volts at 20 mA and 20 kHz is connected to the cathode between pins 2 and 17. Circular grooves 46 and 47 are provided in the outer and inner conductors respectively at both sides of diode 30 for impedance matching. Pin 13 is provided for a getter (not shown) and the pins 2, 10, 13 and 17 may be made of Mo.
GB1295607D 1970-05-20 1971-05-17 Expired GB1295607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7007311A NL7007311A (en) 1970-05-20 1970-05-20

Publications (1)

Publication Number Publication Date
GB1295607A true GB1295607A (en) 1972-11-08

Family

ID=19810119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295607D Expired GB1295607A (en) 1970-05-20 1971-05-17

Country Status (5)

Country Link
JP (1) JPS466814A (en)
DE (1) DE2120110A1 (en)
FR (1) FR2090156B1 (en)
GB (1) GB1295607A (en)
NL (1) NL7007311A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI2A (en) * 1843-04-06 Säkerhetsantändningsrör
DE928190C (en) * 1942-06-18 1955-05-26 Siemens Ag Arrangement for voltage measurement in concentric lines

Also Published As

Publication number Publication date
JPS466814A (en) 1971-12-15
FR2090156A1 (en) 1972-01-14
FR2090156B1 (en) 1975-01-17
NL7007311A (en) 1971-11-23
DE2120110A1 (en) 1971-12-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees