Welding process for slotted tungsten rod
AssigneeGTE Sylvania Incorporated
InventorRobert S. White, Jr.
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Abstract
In the process of inserting and fastening a thin molybdenum ribbon into the slot of a slotted tungsten rod, for use in the press seal of a high silica glass lamp envelope, a two step welding process is used. The first weld is made with the two welding electrodes at the internal end of the slot. The second weld is made with the electrodes closer to the end of the rod.
Claims5
In the process of connecting a refractory metal ribbon to a refractory metal rod having a diametrical slot at one end thereof, for embedment in a press seal of an electric lamp having a high silica glass envelope, the improvement which comprises inserting the ribbon into the slotted rod, making a first weld on the rod at about the internal end of the slot by closing a pair of electrodes thereon and passing electric current between the electrodes, and then making a second electric weld on the slotted portion of the rod at about the external end of the slot, the second weld closing the sides of the slot onto the ribbon.
Dependencies are inferred from the claim text.