Brazed lower vacuum housing for a dewar

US5598966A · kind A · utility

Assignee

• Santa Barbara Research Center · US

Inventors

• Timothy S. Romano · Santa Ynez, US
• Tom K. Evans · Goleta, US
• Gary B. Hughes · Goleta, US
• Karl H. Neumann · Sankt Augustin, DE

Key dates

• Filing date: Jul 19, 1994
• Grant date: Feb 4, 1997
• Expiry date: Jul 19, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K1/19
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A lower vacuum housing (34) of a sensor dewar (26) is fabricated in a single brazing operation from ceramic and metallic components. The components are assembled with ceramic-to-metal interfaces and metal-to-metal interfaces. Brazing is accomplished by active brazing of the ceramic-to-metal interfaces and non-active brazing of the metal-to-metal interfaces. Specific combinations of active braze alloys and non-active braze alloys are provided for various combinations of dewar materials.