US1675261A - Electric discharge device - Google Patents
Electric discharge device Download PDFInfo
- Publication number
- US1675261A US1675261A US680527A US68052723A US1675261A US 1675261 A US1675261 A US 1675261A US 680527 A US680527 A US 680527A US 68052723 A US68052723 A US 68052723A US 1675261 A US1675261 A US 1675261A
- Authority
- US
- United States
- Prior art keywords
- cathode
- discharge device
- electric discharge
- contact
- conductors
- 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
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
- H01J17/06—Cathodes
Definitions
- the present invention relates to construction of cathodes for electrical discharge devices, and in particular to cathodes for devices in which the cathode constitutes the seat of an arc-like discharge, as, for example,
- the seat of the arelike discharge is an incandescent filament which is commonly heated during operation by its electrical resistance to a current traversing the same during operation.
- This cathode construction and mode of heating the cathode is one of the features limitingthe permissible current carrying capacity of the device and introduces structural difliculties.
- a cathode comprisingmembers of concentrated mass which make an imperfect contact with one another, so that these masses may be heated at the region of high transition resistance by a current which is not too excessive to be conveyed by ordinary sealed-in conductors.
- FIG. 1 a rectifier containing a cathode embodying my in ention
- Fig. 2 is an enlarged view of the cathode
- Figs. 3 and .4 illustrate modifications.
- the rectifier shown in Fig. 1 comprises a glass envelope '1, containing a suitable gas, for example, argon, and being provided with an anode 2, and a cathode 3, joined respectively to leading-in conductors 4, 5 and 6, which are sealed into the glass envelope in the usual way.
- the anode may consist of carbon or a suitable refractory metal, such as molybdenum or tungsten.
- the cathode conductors 5, 6 are joined to the contacts 7 8 of an external screw base.
- a heating current is conveyed thereto by the conductors 9, 10, from any suitable source, as for example, a portion of the secondary of an auto-transformer, 11, which also serves to charge the battery 12 through the conductors 13, 14.
- the cathode comprises cylindrical discs, or buttons 15, 16,
- Fig. 3 illustrates a cathode having a pointed or cone-shaped member 19 contacting at its tip with a disc-shaped member 20, and Fig. 4 illustrates another modification comprising wedge-shaped members 21, 22, making an edge to edge contact.
- the stems 28, 24 are elongated and have a right-angled bend whereas the stems 25, 26 of Fig. 4 are short and straight, being joined by welding across the top of the conductors 5, 6.
- the contacting cathode mem bers are pressed into contact lightly by the springiness of the stems.
- the arc does not concentrate during operation at the hottest portion of the cathode, that is, at the high resistance contact, and there cause local disintegration, but emanates as a diflused glow from the entire heated surface.
- the cathode therefore, has a commercially long life. Because of its exceedingly simple structure, my improved cathode is easily and cheaply constructed.
- a cathode for an electrical discharge device comprising button-shaped members of concentrated mass and supports therefor of lesser cross section than said members and constructed to hold said members in high resistance contact with each 7'
Landscapes
- Discharge Lamp (AREA)
- Lasers (AREA)
- Discharge Heating (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US680527A US1675261A (en) | 1923-12-13 | 1923-12-13 | Electric discharge device |
GB22798/24A GB226165A (en) | 1923-12-13 | 1924-09-26 | Improvements in electric discharge devices |
DEI25394D DE427743C (de) | 1923-12-13 | 1924-11-21 | Kathode fuer elektrische Entladungsvorrichtungen |
FR591596D FR591596A (fr) | 1923-12-13 | 1924-12-12 | Perfectionnements aux dispositifs à décharge électrique |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US680527A US1675261A (en) | 1923-12-13 | 1923-12-13 | Electric discharge device |
Publications (1)
Publication Number | Publication Date |
---|---|
US1675261A true US1675261A (en) | 1928-06-26 |
Family
ID=24731474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US680527A Expired - Lifetime US1675261A (en) | 1923-12-13 | 1923-12-13 | Electric discharge device |
Country Status (4)
Country | Link |
---|---|
US (1) | US1675261A (de) |
DE (1) | DE427743C (de) |
FR (1) | FR591596A (de) |
GB (1) | GB226165A (de) |
-
1923
- 1923-12-13 US US680527A patent/US1675261A/en not_active Expired - Lifetime
-
1924
- 1924-09-26 GB GB22798/24A patent/GB226165A/en not_active Expired
- 1924-11-21 DE DEI25394D patent/DE427743C/de not_active Expired
- 1924-12-12 FR FR591596D patent/FR591596A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE427743C (de) | 1926-04-17 |
FR591596A (fr) | 1925-07-07 |
GB226165A (en) | 1925-07-02 |
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