Claims
- 1. A method for position orienting a base assembly with respect to a curved arc tube of a high intensity discharge lamp, said base assembly including a base shell having an eyelet and a locator structure attached thereto, said method comprising the steps of:
- providing within said discharge lamp an arc tube support structure coplanar with said arc tube;
- providing means for welding said locator structure to said base shell, said welding means capable of separately receiving and supporting each of said lamp and said locator structure;
- disposing said locator within said welding means and positioning said lamp within said welding means such that said base shell and said locator are in operative contact before welding;
- providing a light source proximate to said welding means and aligning the light beam of said light source perpendicular to both the longitudinal axis of said lamp and to the plane formed by said arc tube and said locator structure;
- providing a screen opposite said lamp such that a shadow image of said arc tube support structure is formed thereon when the light beam passes through the center of the neck of said lamp and impinges on said screen;
- rotating said lamp radially within said welding means until the plane formed by said arc tube and said support structure is perpendicular to said arc tube-locator plane; and
- activating said welding means to weld said locator structure to said base shell, thereby forming a base assembly that is position oriented with respect to said arc tube.
- 2. The method according to claim 1 wherein said locator structure is of the tab-type.
- 3. The method according to claim 2 wherein said locator is L-shaped in form.
- 4. The method according to claim 1 wherein said welding means comprises a welding fixture attached to a resistance welder.
- 5. The method according to claim 4 wherein said welding fixture comprises a frame, a bottom electrode disposed within said frame, two guide pins to guide said lamp within said fixture positioned on either side of said bottom electrode, a back stop positioned proximate to said guide pins and a retractable top electrode positioned above and spaced from said bottom electrode.
- 6. The method according to claim 5 wherein said bottom electrode has a surface with an aperture therein for holding said locator structure within said welding fixture.
- 7. The method according to claim 5 wherein said welding fixture further includes a support bracket spaced from said bottom electrode, said bracket providing support for a lamp positioned within said welding fixture.
Parent Case Info
This is a divisional application of co-pending application Ser. No. 810,953 filed on Dec. 19, 1985.
US Referenced Citations (6)
Divisions (1)
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Number |
Date |
Country |
Parent |
810953 |
Dec 1985 |
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