US2200950A - Gaseous electric discharge device - Google Patents
Gaseous electric discharge device Download PDFInfo
- Publication number
- US2200950A US2200950A US19086A US1908635A US2200950A US 2200950 A US2200950 A US 2200950A US 19086 A US19086 A US 19086A US 1908635 A US1908635 A US 1908635A US 2200950 A US2200950 A US 2200950A
- Authority
- US
- United States
- Prior art keywords
- container
- electric discharge
- discharge device
- auxiliary electrode
- gaseous
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
Definitions
- the present invention relates to gaseous electric discharge devices generally and more particularly theinvention relates to such devices the containers of whichare atan elevated temperature dur- 5 ing the operation of the device, such as high pressure mercury vapor lamps and lamps the gaseous atmosphere of which consists of or comprises the vapor of a diflicultly vaporizable metal, that is, a metal which is at a pressure of less than 1 mm. at a temperature of 200 0., such as sodium, cadmium, magnesium, or zinc.
- the object of the present invention is to provide a long lived gaseous electric discharge lamp device the container of which is at an elevated 25 temperature during the operation of the device and which container has an auxiliary electrode associated therewith. Still further objects and advantages attaching to the device and to its use and operation will be apparent to those skilled 30 in the art from the following particular description.
- the new and novel gaseous-electric discharge lamp comprises a U- shaped container I having an electrode 2 sealed into each end thereof and having a gaseous atmosphere therein comprising starting gas, such as neon at a low pressure of approximately 1 to 5 mm., and a metal vapor, such as sodium vapor.
- a quantitycf sodium is introduced into said container I during the manufacture of the lamp. which acts as the source of the sodium vapor.
- Said electrodes 2 are electron emitting when 10 heated and comprise a heater element, such as a coiled tungsten filament having another tungsten or nickel filament wrapped around said coiled filament, coated or impregnated with an electron emitting material, such as barium oxide.
- a heater element such as a coiled tungsten filament having another tungsten or nickel filament wrapped around said coiled filament, coated or impregnated with an electron emitting material, such as barium oxide.
- a heat conservator such as a double-walled jacket having the space between the walls thereof evacugo ated, which reduces heat losses from said container I and-in which said container I is removably mounted is useful in this connection.
- the lamp has an auxiliary electrode consisting of an element 3, of nickel, for example, in eontact with said container I at the curved part thereof and a narrow metal strip 4 extending along said container I between the parallel legs thereof.
- the element 3 partially surroundsthe curved part of the container I and is covered with an electrically insulating enamel layer 5, such as aluminium oxide or magnesium oxide, so that said element 3 is separated from the container I.
- the strip 4 is connected to a current lead of one of the electrodes 2 so that the auxil- I iary electrode is at the same potential. as the main electrode 2.
- the auxiliary electrode is at a different potential than said main electrode 2.
- the strip 4 is likewise covered with insulating enamel and is mounted 40 along the container I. Softening of the container- I at the partsthereof covered by the element 3 and the strip 4 doesnot take place in the above described lamp.
- the strip 4 and v the element 3 consist ofaluminium the surface of which is oxidized.
- the element 3 is uncoated o6 auxiliary electrode is a wire wound around the container which wire is covered with insulating j material, and, when desired, the surface o1 the wire is oxidized and is of a material the oxide of which is insulating.
- An electric discharge device comprising a U-shaped container, electrodes sealed therein at the ends thereof, a gaseous atmosphere therein, an external auxiliary electrode mounted on the curved part of said container and a layerof insulating material interposed between said auxiliary electrode and said container.
- An electric discharge device comprising a U-shaped container, electrodes and electrode leads sealed therein at the ends thereof, a gaseous atmosphere therein, an external auxiliary electrode mounted on the curved part of said container, a layer of insulating material interposed between said auxiliary electrode and said container and a current lead connecting said auxiliary electrode to one of said electrode leads.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE429010X | 1934-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2200950A true US2200950A (en) | 1940-05-14 |
Family
ID=6477548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US19086A Expired - Lifetime US2200950A (en) | 1934-05-03 | 1935-04-30 | Gaseous electric discharge device |
Country Status (5)
Country | Link |
---|---|
US (1) | US2200950A (de) |
BE (1) | BE409117A (de) |
FR (1) | FR789199A (de) |
GB (1) | GB429010A (de) |
NL (1) | NL41541C (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5391960A (en) * | 1991-06-27 | 1995-02-21 | Stanley Electric Co., Ltd. | Cold cathode tube for generating light with uniform intensity along the tube |
-
0
- NL NL41541D patent/NL41541C/xx active
- BE BE409117D patent/BE409117A/xx unknown
-
1935
- 1935-02-25 GB GB6033/35A patent/GB429010A/en not_active Expired
- 1935-04-23 FR FR789199D patent/FR789199A/fr not_active Expired
- 1935-04-30 US US19086A patent/US2200950A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5391960A (en) * | 1991-06-27 | 1995-02-21 | Stanley Electric Co., Ltd. | Cold cathode tube for generating light with uniform intensity along the tube |
Also Published As
Publication number | Publication date |
---|---|
FR789199A (fr) | 1935-10-24 |
GB429010A (en) | 1935-05-22 |
NL41541C (de) | |
BE409117A (de) |
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