GB871594A - Improvements relating to the sealing of cathode ray tubes, thermionic valves and the like - Google Patents
Improvements relating to the sealing of cathode ray tubes, thermionic valves and the likeInfo
- Publication number
- GB871594A GB871594A GB3434058A GB3434058A GB871594A GB 871594 A GB871594 A GB 871594A GB 3434058 A GB3434058 A GB 3434058A GB 3434058 A GB3434058 A GB 3434058A GB 871594 A GB871594 A GB 871594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exhaust tube
- sleeve
- cathode ray
- fins
- induction coil
- 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
- 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
- H01J9/40—Closing vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
871,594. Discharge apparatus. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 30, 1959 [Oct. 27, 1958; July 23, 1959], Nos. 34340/58 and 25340/59. Class 39(1). In a cathode ray tube or thermionic valve wherein a glass exhaust tube extends from the centre of the pressed glass base and is encircled by a ring array of fins passing through the base, the exhaust tube is heated for sealing off short by a sleeve surrounding the exhaust tube and heated by an induction coil, the sleeve having a radially thin portion which extends in the annular space between the ring of fins and the exhaust tube. In one form, Fig. 1, the induction coil 7 heats carbon sleeve 6 which surrounds the 'exhaust tube 3. The cathode ray tube has a cap (not shown) through which the fins 4 pass and which accommodates the exhaust pipe. After the exhaust tube has been sealed off the pipe is annealed by the heat radiated from sleeve 6. In a modification, Fig. 2, a stainless steel sleeve 7 is supported by a refractory insulating member 12 grooved to hold the induction coil 7. Members 13, 15, 16 are also of refractory insulating material. 16<SP>1</SP> may be a single annular recess.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3434058A GB871594A (en) | 1958-10-27 | 1958-10-27 | Improvements relating to the sealing of cathode ray tubes, thermionic valves and the like |
| FR808447A FR1238198A (en) | 1958-10-27 | 1959-10-26 | Sealing the cathode ray tube tail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3434058A GB871594A (en) | 1958-10-27 | 1958-10-27 | Improvements relating to the sealing of cathode ray tubes, thermionic valves and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB871594A true GB871594A (en) | 1961-06-28 |
Family
ID=10364423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3434058A Expired GB871594A (en) | 1958-10-27 | 1958-10-27 | Improvements relating to the sealing of cathode ray tubes, thermionic valves and the like |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1238198A (en) |
| GB (1) | GB871594A (en) |
-
1958
- 1958-10-27 GB GB3434058A patent/GB871594A/en not_active Expired
-
1959
- 1959-10-26 FR FR808447A patent/FR1238198A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1238198A (en) | 1960-08-05 |
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