US2044591A - Gas-filled electric discharge tube - Google Patents

Gas-filled electric discharge tube Download PDF

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Publication number
US2044591A
US2044591A US644703A US64470332A US2044591A US 2044591 A US2044591 A US 2044591A US 644703 A US644703 A US 644703A US 64470332 A US64470332 A US 64470332A US 2044591 A US2044591 A US 2044591A
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US
United States
Prior art keywords
discharge tube
gas
electric discharge
voltage
curve
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 - Lifetime
Application number
US644703A
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English (en)
Inventor
Penning Frans Michel
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US2044591A publication Critical patent/US2044591A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/40—Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes

Definitions

  • This invention relates to. a new negative resistance device formed by a helium-filled electric discharge tube in which the electrode spacing and the pressure of gas are such that with cold electrodes the break-down voltage has more than one value.
  • Figs. 1 and 2 are curves serving to explain the operation of applicants device
  • Fig. 3 is a gas-filled discharge tube in accordance with the present invention
  • Fig. 4 represents curves graphically illustrating the characteristics of the tube shown in Fig. 3
  • Fig. 5 shows the use of applicants invention in a suitable circuit arrangement.
  • break-down voltage of a gas-filled discharge tube provided with two parallel cold electrodes is determined as a function of the product of the electrode spacing and the pressure of gas, this function is found to have a minimum.
  • This function graphically illustrated, has generally the shape of the curve shown in Figure 1 in which the break-down voltage V is shown as a function of the pressure p (with constant electrode spacing) or of the electrode spacing d (with constant pressure).
  • the glass tube 4 has in turn sealed to it a ferrochrome cylinder 1 which surrounds the cylinder l at a small distance for part of its length.
  • the cylinder 1 contains a bottom 8 which separates the interior of the discharge tube from the open air and is furnished with a leading-in wire 9.
  • This member 8 and the bottom ll! of the cylinder l constitute the two electrodes of the discharge tube which is filled with a supply of helium at a pressure of 0.84 ms. ,By displacing the cylinder 1 it is possible to vary the spacing between the electrodes and thus the product of the electrode spacing and the pressure of gas.
  • the curve I3 indicates the results obtained when the electrode spacing is 2.33 cms. and the helium pressure is again 0.84 mm.
  • the second branch of the curve corresponds essentially to the branch 82 but lies higher than the latter and is not shown in the figure.
  • the part of the curve II which is comprised between the points H and K represents, similarly to the part of the curve I3 that is comprised between the points L and M, a negative resistance, as the voltage increases at a decreasing current. Tests revealed that the discharge at a suificiently low current limiting resistance is nevertheless stable in these parts. This current limiting resistance may even be dispensed with entirely.
  • the discharge lends itself therefore with advantage to use as a negative resistance, for example for amplifying electric oscillations.
  • Figure 5 shows, for example, a suitable circuit arangement comprising a discharge tube M of the construction above described, a battery l5 of say 750 volts and an inductance l6 of say 250 henries.
  • the discharge tube M has a negative resistance and the circuit illustrated has occurring in it electric oscillations that may be ob tained between the cnds of the inductance.
  • a voltage with a maximum value of 520 volts and a current intensity up to 30 m. amp. were ascertained.
  • An electric discharge tube comprising a sealed envelope and a plurality of electrodes mounted therein, one of said electrodes being frictionally supported from a metallic member which forms a part of the sealed envelope.
  • An electric discharge tube comprising a sealed envelope and a pair of cold electrodes mounted therein, said envelope having an intermediate portion formed of metal, one of said electrodes being frictionally supported from said intermediate metallic portion, and the other electrode being positioned close to the first electrode and closing one end of the envelope.
  • An electric discharge tube comprising a, sealed cylindrical envelope, an intermediate annular portion thereof being formed of metal, a cylindrical electrode having one end closed and frictionally supported from said metal portion, and a second cylindrical electrode also closed at one end sealed to one end of said envelope and closing that end, the closed ends of said electrodes being disposed in spaced parallel relation.

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  • Primary Cells (AREA)
  • Endoscopes (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US644703A 1931-11-28 1932-11-28 Gas-filled electric discharge tube Expired - Lifetime US2044591A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL59321A NL36228C (enrdf_load_stackoverflow) 1931-11-28 1931-11-28
GB32777/32A GB415373A (en) 1931-11-28 1932-11-19 Improvements in or relating to negative electric resistances

Publications (1)

Publication Number Publication Date
US2044591A true US2044591A (en) 1936-06-16

Family

ID=32510442

Family Applications (1)

Application Number Title Priority Date Filing Date
US644703A Expired - Lifetime US2044591A (en) 1931-11-28 1932-11-28 Gas-filled electric discharge tube

Country Status (5)

Country Link
US (1) US2044591A (enrdf_load_stackoverflow)
DE (1) DE625821C (enrdf_load_stackoverflow)
FR (1) FR746114A (enrdf_load_stackoverflow)
GB (1) GB415373A (enrdf_load_stackoverflow)
NL (1) NL36228C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702355A (en) * 1948-02-26 1955-02-15 Centre Nat Rech Scient Adjustable voltage glow discharge device
US4320435A (en) * 1979-03-06 1982-03-16 Tii Industries, Inc. Surge arrester assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2564157A (en) * 1947-06-12 1951-08-14 Eknayan Hrant Electric heating system and method of heating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702355A (en) * 1948-02-26 1955-02-15 Centre Nat Rech Scient Adjustable voltage glow discharge device
US4320435A (en) * 1979-03-06 1982-03-16 Tii Industries, Inc. Surge arrester assembly

Also Published As

Publication number Publication date
NL36228C (enrdf_load_stackoverflow) 1935-09-16
DE625821C (de) 1936-02-15
FR746114A (fr) 1933-05-23
GB415373A (en) 1934-08-23

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