US2001509A - Electric discharge apparatus - Google Patents

Electric discharge apparatus Download PDF

Info

Publication number
US2001509A
US2001509A US678952A US67895233A US2001509A US 2001509 A US2001509 A US 2001509A US 678952 A US678952 A US 678952A US 67895233 A US67895233 A US 67895233A US 2001509 A US2001509 A US 2001509A
Authority
US
United States
Prior art keywords
cathode
anode
electric discharge
envelope
tube
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
US678952A
Other languages
English (en)
Inventor
Uyterhoeven Willem
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2001509A publication Critical patent/US2001509A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr

Definitions

  • the present invention relates to electric discharge apparatus and particularly to glow lamps which employ hot cathodes coated with electronically active material.
  • Tubes of this character usually contain one or more gases, or vapors, or a mixture of a gas and a vapor. During operation, a discharge is produced within the tube which is accompanied by light of an intense character.
  • An object of the present invention is to eliminate the presence of this layer so that a glow lamp of this character may operate at optimum efliciency.
  • This object is carried out, in brief, by giving the anode a particular shape of surface, for example, an undulated configuration, consisting of projections and grooves.
  • anode of this sort it has been found that the material evaporated from the glow'cathode is deposited mainly in the grooves of the undulations and not on the walls of the tube.
  • the envelope of the glow lamp is kept free of the opaque material.
  • the improved form of anode offers the further advantage that the dimensions of the anode can be decreased while the anode surface available for the discharge current remains the same. As a result, the anode intercepts a smaller portion of the produced light rays and thus serves to increase the light output and power economy of the tube.
  • the improved shape of anode also offers additional mechanical strength to the member.
  • FIG. 1 illustrates a glow lamp provided with the improved form of anode
  • Fig. 2 is a plan view of the anode.
  • numeral I designates a bulbous form of envelope which terminates in a reentrant stem and press 2.
  • a filamentary cathode 3 which may take the form of a tungsten helix coated with electronically active material, such as alkaline earth oxide.
  • the filament is mounted in position, preferably transversely of the envelope, by means of a pair of rigid leading-in conductors 4 which are sealed in the stem.
  • a tube 5 5 of insulating material may surround the portion of each of these conductors which projects beyond the upper surface of the press.
  • anodes 6 which take the form of a ribbon, such as molybdenum strip, bent into.corrugated or undulated circular form as shown in Fig. 2 and positioned transversely of the envelope.
  • the corrugations extend preferably in a direction toward the cathode, i. e. along the depth of the strip.
  • the anodes are mounted within the envelope by stiff conductors I secured to each anode at suitable places and surrounded by a tubing 8 of insulating material.
  • the en- 2 velope I after being highly evacuated, may be filled with a fixed gas such as neon or may contain a vapor-producing material such as mercury or sodium. If desired, these gases and materials may be combined.
  • the two anodes 6 are preferably connected to opposite ends of a secondary transformer winding (not shown) and the cathode 3 connected to the center of this winding through a series currentlimiting resistance.
  • alternating current is applied to the primary of the transformer, an intermittent discharge is produced between the cathode, which may be heated in any suitable manner, for example, by a transformer, and each of the anodes.
  • the discharge emits light rays, the color of which is determined by the composition of the gas or vapor filling.
  • the anode of the tube is preferably given a dimension such that a minimum satisfactory area is available per unit of current intensity. It is apparent that an anode having an undulated surface, such as described, presents a large area 55 electrode.
  • An electric discharge device comprising an envelope containing a cathode coated with electronically active material, an anode and an.
  • said anode being circular and having a corrugated suri'ace, said anode and said cathode being separated an appreciable distance, the length of the corrugations in said anode extending toward said cathode tocollect the material emanating irom said cathode.
  • An electric discharge device comprising an envelope containing a cathode coated with electronically active material, said anode and said cathodebeing separated an appreciable distance, an anode and an ionizable material, said anode being made of corrugated strip having the length of the corrugations extend toward the cathode to collect the material emanating 'i'rom said cathode.
  • An electric discharge device comprising an envelope containing an electrical filamentary cathode coated with electronically active material, a pair oi flat anodes mounted on opposite sides of the cathode and an ionizable material, said anodes being positioned in planes parallel to said cathode and being corrugated, the length the corrugations extending toward the cathode to collect the material emanating from sa cathode.
  • An electric discharge device comprising an envelope containing a thermionic cathode, an anode and a gaseous atmosphere, said anode and said cathode being separated an appreciable distance, said anode being a corrugated strip having the length 01' the corrugations extend toward said cathode to collect the material emanating from said cathode.
  • An electric discharge device comprising an envelope containing a thermionic cathode, an anode and a gaseous atmosphere comprising a metal vapor, said anode and said cathode being separated an appreciable distance, said anode being a corrugated strip having the length of the corrugations extend toward said cathode to collect the material emanating from said cathode.
  • An electric discharge device comprising an envelope containing a thermionic cathode, an anode and a gaseous atmosphere comprising alkali metal vapor, said anode and said cathode being separated an appreciable distance, said anode being a corrugated strip having the length of the corrugations extend toward said cathode to collect the material emanating from said cathode.
  • An electric discharge device comprising an envelope containing a thermionic cathode, an anode and a gaseous atmosphere comprising sodium vapor, said anode and said cathode being separated an appreciable distance, said anode being a corrugated strip having the length of the corrugations extend toward said cathode to collect the material emanating irom said cathode.

Landscapes

  • Discharge Lamp (AREA)
US678952A 1932-06-30 1933-07-03 Electric discharge apparatus Expired - Lifetime US2001509A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL61706A NL36712C (enrdf_load_stackoverflow) 1932-06-30 1932-06-30

Publications (1)

Publication Number Publication Date
US2001509A true US2001509A (en) 1935-05-14

Family

ID=33550365

Family Applications (1)

Application Number Title Priority Date Filing Date
US678952A Expired - Lifetime US2001509A (en) 1932-06-30 1933-07-03 Electric discharge apparatus

Country Status (3)

Country Link
US (1) US2001509A (enrdf_load_stackoverflow)
BE (1) BE396740A (enrdf_load_stackoverflow)
NL (1) NL36712C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449113A (en) * 1944-07-22 1948-09-14 Fruth Hal Frederick Electric discharge device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449113A (en) * 1944-07-22 1948-09-14 Fruth Hal Frederick Electric discharge device

Also Published As

Publication number Publication date
BE396740A (enrdf_load_stackoverflow)
NL36712C (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US3121184A (en) Discharge lamp with cathode shields
US2262177A (en) Lighting and radiating tube
US2530990A (en) Electric discharge device
US2694785A (en) Electroluminescent oscillator
US2103041A (en) Gaseous electric discharge lamp device
US2064369A (en) Electric discharge tube
US3264511A (en) Glow discharge device
US2001501A (en) Gaseous electric discharge device
US2001509A (en) Electric discharge apparatus
US2438181A (en) Fluorescent and/or cathode glow lamp and method
US1951138A (en) Gaseous electric discharge lamp device
US2692347A (en) Metalized stems for low-pressure discharge tubes
US2273450A (en) High pressure metal vapor lamp
US2906905A (en) Fluorescent lamp
US2241345A (en) Electron emissive cathode
US2479164A (en) Electric glow discharge lamp
US2164183A (en) Electric lamp
US1989786A (en) Base and based electric device
US1919932A (en) Gaseous electric discharge device
US2236289A (en) Thermionic device
US2135726A (en) Gaseous electric discharge lamp
US2010852A (en) Gaseous electric discharge device
US2030715A (en) Gaseous electric discharge lamp device
US1968839A (en) Low voltage discharge tube
US1945979A (en) Electron discharge tube