GB715794A - Improvements in or relating to indirectly heated electric discharge tubes - Google Patents
Improvements in or relating to indirectly heated electric discharge tubesInfo
- Publication number
- GB715794A GB715794A GB25430/52A GB2543052A GB715794A GB 715794 A GB715794 A GB 715794A GB 25430/52 A GB25430/52 A GB 25430/52A GB 2543052 A GB2543052 A GB 2543052A GB 715794 A GB715794 A GB 715794A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- insulating cylinder
- filament
- indentations
- sleeve
- 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
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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
- C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Solid Thermionic Cathode (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
715,794. Discharge apparatus. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 10, 1952 [Oct. 13, 1951], No. 25430/52. Class. 39(1) An electric discharge tube is provided with an indirectly heated cathode comprising a filament body housed in an insulating cylinder which engages the cathode sleeve only at a few points, the cathode being characterized in that near each end the cathode sleeve has indentations which hold the insulating cylinders spaced apart from the cathode sleeve, whilst at the area of these indentations the filament body does not engage the inner side of the insulating cylinder. In one arrangement, Fig. 1, the insulating cylinder 5 is supported by indentation 4 at the top and bottom of the cathode sleeve 3. The helical heater 6 does not extend so far as the top indentations 4 and at the bottom end has straight limbs in the vicinity of the lower indentation 4 so that it does not contact the insulating cylinder 5 in this region. In another arrangement, Fig. 2, the V-shaped filament is coated with insulation except at the parts which lie near the lower indentation 8. With the improved electrical insulation thus provided between the filament and cathode the tube may be operated with 6000 volts difference between filament and cathode. The cathode may have a diameter of 3 mm., the spacing between the cathode and the insulating cylinder may be 0.1 to 0.2 mm., and the insulating cylinder may have a wall thickness of 0.38 mm.; the insulating cylinder is preferably of magnesia but may be of quartz or ceramic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL715794X | 1951-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB715794A true GB715794A (en) | 1954-09-22 |
Family
ID=19814946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25430/52A Expired GB715794A (en) | 1951-10-13 | 1952-10-10 | Improvements in or relating to indirectly heated electric discharge tubes |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2870366A (en) |
| BE (1) | BE514709A (en) |
| DE (1) | DE927521C (en) |
| FR (1) | FR1064299A (en) |
| GB (1) | GB715794A (en) |
| NL (1) | NL84125C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127617A (en) * | 1981-12-11 | 1984-04-11 | Tokyo Shibaura Electric Co | Cathode structure for electron tube |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE973812C (en) * | 1954-01-20 | 1960-06-15 | Siemens Ag | Indirectly heated cathode for electrical discharge vessels with a tubular cathode sleeve |
| BE572249A (en) * | 1957-10-23 | |||
| US2973449A (en) * | 1957-10-23 | 1961-02-28 | Philips Corp | Electric discharge tube |
| NL275209A (en) * | 1961-02-24 | |||
| US3214628A (en) * | 1962-06-11 | 1965-10-26 | Rca Corp | Cathode assembly for electron tube |
| US3287080A (en) * | 1963-06-27 | 1966-11-22 | Rca Corp | Electron tube mount and method of making the same |
| DE1614495B1 (en) * | 1967-04-10 | 1971-03-11 | Siemens Ag | MEDIUM HEATED STORAGE CATHODE FOR ELECTRIC DISCHARGE VESSELS |
| DE1933309B2 (en) * | 1969-07-01 | 1971-05-06 | INDIRECTLY HEATED GLOW CATHODE | |
| US3767958A (en) * | 1971-12-23 | 1973-10-23 | Gte Sylvania Inc | Electron discharge device having increased heater-cathode breakdown voltage |
| FR2186706B1 (en) * | 1972-06-02 | 1974-12-27 | Commissariat Energie Atomique |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE360807A (en) * | 1928-05-21 | |||
| US1974448A (en) * | 1930-04-05 | 1934-09-25 | Henry L Crowley & Co Inc | Indirectly heated cathode and insulator assembly |
| US2079057A (en) * | 1931-06-01 | 1937-05-04 | Raytheon Production Corp | Thermionic cathode |
| US1982885A (en) * | 1932-04-02 | 1934-12-04 | Stupakoff Lab Inc | Insulator and cathode embodying the same |
| US2081415A (en) * | 1934-09-05 | 1937-05-25 | Bell Telephone Labor Inc | Electron emitter |
-
0
- BE BE514709D patent/BE514709A/xx unknown
- NL NL84125D patent/NL84125C/xx active
-
1952
- 1952-10-01 US US312592A patent/US2870366A/en not_active Expired - Lifetime
- 1952-10-10 GB GB25430/52A patent/GB715794A/en not_active Expired
- 1952-10-10 FR FR1064299D patent/FR1064299A/en not_active Expired
- 1952-10-11 DE DEN6206A patent/DE927521C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127617A (en) * | 1981-12-11 | 1984-04-11 | Tokyo Shibaura Electric Co | Cathode structure for electron tube |
Also Published As
| Publication number | Publication date |
|---|---|
| DE927521C (en) | 1955-05-09 |
| BE514709A (en) | |
| NL84125C (en) | |
| US2870366A (en) | 1959-01-20 |
| FR1064299A (en) | 1954-05-12 |
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