GB829339A - Improvements in or relating to equipotential cathodes for electric discharge tubes and discharge tubes containing such cathodes - Google Patents
Improvements in or relating to equipotential cathodes for electric discharge tubes and discharge tubes containing such cathodesInfo
- Publication number
- GB829339A GB829339A GB31349/58A GB3134958A GB829339A GB 829339 A GB829339 A GB 829339A GB 31349/58 A GB31349/58 A GB 31349/58A GB 3134958 A GB3134958 A GB 3134958A GB 829339 A GB829339 A GB 829339A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathodes
- discharge tubes
- cathode
- equipotential
- relating
- 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
Links
- 229910000679 solder Inorganic materials 0.000 abstract 2
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 abstract 1
- 229910039444 MoC Inorganic materials 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
829,339. Thermionic cathode constructions. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 1, 1958 [Oct. 4, 1957 ; March 13, 1958], No. 31349/58. Class 39(1). An equipotential cathode consist of touching turns 10 of a tungstenthorium wire, the turns being covered with solder 11 on the side adjacent the heater, and ground off to half their thickness on the emissive side, so that said side has a smooth continuous surface. In Fig. 2, the cathode is helically wound to form a cylinder, but it may be in disc form, which may further be either flat or dished, Figs. 3 and 4 (not shown). The solder may be molybdenum carbide, which may also contain powdered molybdenum. The cathode may be heated by electron bombardment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL221344 | 1957-10-04 | ||
| NL225825 | 1958-03-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB829339A true GB829339A (en) | 1960-03-02 |
Family
ID=26641626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31349/58A Expired GB829339A (en) | 1957-10-04 | 1958-10-01 | Improvements in or relating to equipotential cathodes for electric discharge tubes and discharge tubes containing such cathodes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2949557A (en) |
| BE (1) | BE571711A (en) |
| CH (1) | CH366905A (en) |
| DE (1) | DE1063718B (en) |
| FR (1) | FR1204038A (en) |
| GB (1) | GB829339A (en) |
| NL (1) | NL95320C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3318716A (en) * | 1962-09-11 | 1967-05-09 | Pennsalt Chemicals Corp | Foam reduction and coating |
| DE1169039B (en) | 1959-09-03 | 1964-04-30 | Ass Elect Ind | Indirectly heated cathode with an insulated heating wire wound around a spring tensioned wire |
| NL272248A (en) * | 1960-12-15 | |||
| DE1180468B (en) * | 1961-04-21 | 1964-10-29 | Siemens Elektrogeraete Gmbh | Cooking chamber of an HF radiation cooker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2526054A (en) * | 1940-03-13 | 1950-10-17 | M O Valve Co Ltd | Electrode assembly for very highfrequency electron discharge devices |
| GB582162A (en) * | 1940-03-13 | 1946-11-07 | M O Valve Co Ltd | Improvements in thermionic valves adapted to operate at very high frequencies |
| BE518861A (en) * | 1952-04-01 |
-
0
- NL NL95320D patent/NL95320C/xx active
- BE BE571711D patent/BE571711A/xx unknown
-
1958
- 1958-09-30 DE DEN15644A patent/DE1063718B/en active Pending
- 1958-10-01 GB GB31349/58A patent/GB829339A/en not_active Expired
- 1958-10-01 CH CH6455758A patent/CH366905A/en unknown
- 1958-10-03 FR FR1204038D patent/FR1204038A/en not_active Expired
- 1958-10-03 US US765254A patent/US2949557A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR1204038A (en) | 1960-01-22 |
| CH366905A (en) | 1963-01-31 |
| NL95320C (en) | |
| US2949557A (en) | 1960-08-16 |
| DE1063718B (en) | 1959-08-20 |
| BE571711A (en) |
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