Title: Vacuum-tight windows for passage of X-rays or similar penetrating radiation

Abstract: A vacuum-tight window construction for the passage of X-ray and similar penetrating radiation, the edge of the window having the shape of a tube and being tightly secured with a tube-shaped frame. The connection between the window and the frame is effected by a press-fit combination of three tube-shaped parts one into the other. One part is the tubular edge of the window, the second part is the edge of the frame, and the third part is an additional ring, the materials being selected such that the coefficient of thermal expansion of the outermost part is lower than that of the part disposed in the middle, and that of the innermost part is at least equal to that of the outermost part and less than that of the center part. The outermost and innermost parts can be composed of steel, and the middle part of pure or alloyed aluminum.

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Inventors: Kotschak, Otto (Erlangen-Buckenhof, DE, US)
Frank, Richard (Erlangen, DE, US)

Application Number: 669725
Filing Date: 1976-03-23
Publication_date: 1978-10-10
Assignee: Siemens Aktiengesellschaft (Berlin & Munich, DE)
Primary Class(es): 220/2.1R 313/420, 378/140, 378/161
Other Classes:
US Patent Ref:

1517322	Dec, 1924	Templin	250/505.
2187126	Jan, 1940	Kern et al.	313/420.
2222197	Nov, 1940	Engels	220/2.
2820168	Jan, 1958	Stiff	313/420.
3828190	Aug, 1974	Dahlin et al.	250/505.
3878417	Apr, 1975	Eberlein	313/59.

Other Refs: 618,8111,103,563829,695

Jul, 1947	GB
Feb, 1968	GB
Mar, 1960	GB

Primary Examiner: Marcus, Stephen
Assistant Examiner:
Attorney: Hill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson