GB610867A - Improvements in and relating to metal-glass seals - Google Patents
Improvements in and relating to metal-glass sealsInfo
- Publication number
- GB610867A GB610867A GB11784/46A GB1178446A GB610867A GB 610867 A GB610867 A GB 610867A GB 11784/46 A GB11784/46 A GB 11784/46A GB 1178446 A GB1178446 A GB 1178446A GB 610867 A GB610867 A GB 610867A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- metal
- metal body
- closure
- pressing
- 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
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/20—Seals between parts of vessels
- H01J5/22—Vacuum-tight joints between parts of vessel
- H01J5/26—Vacuum-tight joints between parts of vessel between insulating and conductive parts of vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
- H01J2893/0037—Solid sealing members other than lamp bases
- H01J2893/0041—Direct connection between insulating and metal elements, in particular via glass material
- H01J2893/0043—Glass-to-metal or quartz-to-metal, e.g. by soldering
Landscapes
- Joining Of Glass To Other Materials (AREA)
Abstract
610,867. Metal-to-glass seals. PHILIPS LAMPS, Ltd. April 17, 1946, No. 11784. Convention date, Aug. 21, 1941. [Class 36] A metal-to-glass seal is formed by pressing the end of a metal body through a pre-heated glass sheet, the metal body being heated, as by high-frequency induction, sufficiently to melt the contacting portion of the glass. As shown in Fig. 3, the severed disc-portion 2b of the glass forms a closure-member for the metal body 1, the separated portion 2a being removed after cooling. Fig. 5 shows a modification in which the flanged edge 7a of an outer glass sleeve 6 is sealed to a tubular metal body 5 by pressing the latter through the pre-closed end of the sleeve. In this case, the part 7b of the glass is removed after cooling. The metal surface required to adhere to the glass may be pre-coated with enamel and the other surface coated with material, such as graphite, to prevent adhesion. Porous glass may be used, and in all cases the relative coefficients of expansion of the metal and glass are chosen according to the location of the seal on the inner or outer surface of the metal body. When the relative thermal expansion of the metal and glass are substantially different, as in the case of a copper body 12, Fig. 7, and a lead-glass closure 13, a band 15 of high tensile strength may be fitted around the lower end of the metal body.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL610867X | 1941-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB610867A true GB610867A (en) | 1948-10-21 |
Family
ID=19788094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11784/46A Expired GB610867A (en) | 1941-08-21 | 1946-04-17 | Improvements in and relating to metal-glass seals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB610867A (en) |
-
1946
- 1946-04-17 GB GB11784/46A patent/GB610867A/en not_active Expired
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