Claims
- 1. A method of manufacturing a percussion flashlamp which comprises: providing a metal tube having a cylindrical section, one end of which is open and one end of which is closed and a cylindrical glass tube, positioning said glass tube relative to said metal tube in generally axially aligned relationship with an axial section of each in concentric relationship, holding said relationships with at least one holding member which includes an elongated pin, said positioning step including positioning said pin in generally coaxial relationship to each of said tubes and, radially spaced from the interior of all of said cylindrical section of said metal tube with an axial extremity of said pin engaging only said closed end of said metal tube, said metal tube being held on said pin only by gravity, sealing said glass tube to said metal tube by heating, and withdrawing said metal pin from said metal tube, said tubes being radially spaced to avoid conduction of heat away from the area where said glass and metal tubes are joined.
- 2. A method of manufacturing a percussion flashlamp as claimed in claim 1, wherein said pin consists of a material having a low coefficient of thermal conductivity to avoid conducting heat away from the area where said glass and metal tubes are joined.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7305332 |
Apr 1973 |
NL |
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Parent Case Info
This is a continuation of application Ser. No. 446,232, filed Mar. 29, 1974, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3598555 |
Gennocro |
Aug 1971 |
|
3832124 |
Loughridge |
Aug 1974 |
|
3858378 |
Allen et al. |
Jan 1975 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
446232 |
Mar 1974 |
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