GB767948A - Improvements relating to envelopes for electron discharge devices - Google Patents
Improvements relating to envelopes for electron discharge devicesInfo
- Publication number
- GB767948A GB767948A GB2195653A GB2195653A GB767948A GB 767948 A GB767948 A GB 767948A GB 2195653 A GB2195653 A GB 2195653A GB 2195653 A GB2195653 A GB 2195653A GB 767948 A GB767948 A GB 767948A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- metal band
- end wall
- envelope
- metal
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
767,948. Cathode ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Aug. 3, 1954 [Aug. 8, 1953], No. 21956/53. Class 39(1). A metal band 6 is shrunk directly on to the periphery of a soft glass end wall portion 3, 4 of the envelope of an electron discharge device, e.g. a cathode ray tube especially a television receiver of the projection type, the metal band 6 not being sealed to the glass but having a higher coefficient of thermal expansion than the glass, so as to keep the end wall portion 3, 4 under compressive stress. This produces the effect of toughening the glass and so minimises cracking due to heat generated in operation. In manufacture the end wall part 3 is fused by means of flange 4 to cone 2 and the metal band is then applied to flange 4 while the glass and band are heated to 500‹-600‹C., i.e. below the softening temperature of the glass. The metal band may be of chrome-nickel alloy or stainless steel and the glass end wall may be of plate window glass or more generally of lead glass ; the entire envelope may be of soft glass. The end wall 3 may be of meniscus shape, as shown. If the main body part of the envelope is of metal, the metal band is shrunk directly on the glass end part and is not applied to the metal envelope wall portion. The provisional Specification states in addition that the metal band may be of chrome-iron alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2195653A GB767948A (en) | 1953-08-08 | 1953-08-08 | Improvements relating to envelopes for electron discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2195653A GB767948A (en) | 1953-08-08 | 1953-08-08 | Improvements relating to envelopes for electron discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB767948A true GB767948A (en) | 1957-02-13 |
Family
ID=10171573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2195653A Expired GB767948A (en) | 1953-08-08 | 1953-08-08 | Improvements relating to envelopes for electron discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB767948A (en) |
-
1953
- 1953-08-08 GB GB2195653A patent/GB767948A/en not_active Expired
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