Title: Xenon arc lamp with compressive ceramic to metal seals

Abstract: A high pressure arc lamp envelope having an anode portion and cathode portion, separated by a ceramic insulator, is configured to prevent the high pressure from causing tensile stresses in the ceramic and its associated hermetic seals. The window seal is configured to reduce tensile stresses in the window and to place the metal-to-window bond of the seal in compression.

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Inventors: Chan, Edwin T. (Sunnyvale, CA, US)
Jepson, Stanley R. (Campbell, CA, US)

Application Number: 906371
Filing Date: 1978-05-15
Publication_date: 1979-12-18
Assignee: Varian Associates, Inc. (Palo Alto, CA)
Primary Class(es): 220/2.3R 313/113, 313/623
Other Classes:
US Patent Ref:

2513920	Jul, 1950	De Walt	220/2.
2677781	May, 1954	Drieschmann	220/2.
3458744	Jul, 1969	Sowers et al.	313/220.
3551719	Dec, 1970	Peacher et al.	313/220.
3715613	Feb, 1973	Parkman	313/220.
3808496	Apr, 1974	McRae et al.	313/220.

Other Refs:
Primary Examiner: Marcus, Stephen
Assistant Examiner:
Attorney: Cole; Stanley Z., Herbert; Leon F., Berkowitz; Edward H.