Inlead and method of making a discharge lamp

Details Inlead and method of making a discharge lamp Inlead and method of making a discharge lamp

1979-04-23

1981-03-03

Demeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

29 2516, 174 5064, 313220, 313318, 313332, H01J 932, H01J 6106, H01J 6136

Patent

active

042543568

ABSTRACT:
The inlead for the electrode sealed into a quartz arc tube has a foil portion which is stiffened by reversely folded lateral edges. The folds overlap the tapering region of greater stiffness where the foil portion joins the end portions. In making a discharge lamp, the electrode-inlead assembly is self-centering as a result of making the overall width of the foil portion and its folded edges exceed slightly the internal diameter of the quartz tube or neck. The frictional engagement between the folded edges and the inside wall of the neck retains the assembly in place while the neck is heat-collapsed onto the foil to seal the electrode assembly in place.

REFERENCES:
patent: 2667595 (1954-01-01), Noel et al.
patent: 2786882 (1957-03-01), Krefft
patent: 2965698 (1960-12-01), Gottschalk
patent: 3151922 (1964-10-01), Preschel et al.
patent: 3419947 (1969-01-01), Gottschalk
patent: 3868528 (1975-02-01), Lake et al.
patent: 4110657 (1978-08-01), Sobieski

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