Patent ID: 6659829
Filing Date: 2003-12-09
Classification: H01K

Abstract:
A method of making a single ended halogen lamp, comprising the steps of:(a) providing a glass tube cut to an appropriate length; (b) forming a spherical or ellipsoidal section in the glass tube; (c) cutting the glass tube to a final working length after forming the spherical or ellipsoidal section; (d) mounting a filament within the glass tube utilizing a mandrel alignment tool that is inserted from a first end of the glass tube and that engages the filament such that the filament is centered radially within the spherical or ellipsoidal section; (e) sealing a second end of the glass tube while the mandrel alignment tool is inserted within the glass tube; (f) removing the mandrel alignment tool from the glass tube; (g) necking the glass tube from the first end to form an exhaust tube; and (h) filling the glass tube via the exhaust tube with an inert halogen gas and tipping off the exhaust tube.