X-ray apparatus and method of construction
Abstract
Abstract 554,545. Copper -containing solder alloys. BRITISH THOMSON - HOUSTON CO., Ltd., (General Electric Co.). June 16, 1942, No. 8247. Drawings to Specification. [Class 82 (i)] [Also in Groups XXII and XL] In soldering or brazing beryllium to steel or other metals such as in forming a vacuum-tight joint between a beryllium window and the body of an X-ray apparatus for examining chemical substances &c. an alloy is used of a metal which goes into solution relatively slowly with beryllium when both metals are in the molten state. The alloy has a melting point above 700‹C and preferably between 700‹C and 900‹C and may consist of equal parts of copper and silver and brazing may be effected in a hydrogen furnace with calcium chloride as a flux. Another alloy may consist of 80 per cent of copper, 15 per cent of nickel and 5 per cent of iron which has a melting point about 1200 ‹C.
Inventors
- 👤 Zed J Atlee
- 👤 Brackney Howard
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-02-08 | 1946-08-10 | 1947-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-08 | 1950-08-10 | 1951-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-08 | 1954-08-10 | 1955-02-09 | $7700.00 | Window Closed / Lapsed |