High temperature connector for fused silica capillary body

A connector arrangement capable of withstanding temperatures of 600.degree. C. or more for making connections to fused silica tubing said connector comprising:

• a fused silica body defining a first bore open to a distal end of said body and a convergent tapered surface formed on the outside of said distal end, said convergent tapered surface having an included angle of from 20.degree. to 40.degree.;
• an alignment body comprising a material suitable for withstanding temperatures of up to 600.degree. C. defining a second bore having one end forming a divergent tapered surface having substantially the same included angle as said first tapered surface for receiving said distal end of said silica body;
• and,
• means for securing a conduit to said alignment body, communicating said conduit with said first bore and urging said divergent and convergent tapered surfaces into contact.

A connector for capillary tubing defining a capillary bore, said connector comprising:

• a fused silica body fixed to said capillary tubing at a proximate end and defining a first bore in communication with said capillary bore;
• a first trunated conical surface formed on the outside of the silica body at and converging in the direction of the distal end of said silica body and defining a convergent tapered surface having a first included angle of from 20.degree. to 40.degree.;
• a first contact face defined by said silica body at the end of said conical surface surrounding an end of said first bore;
• an alignment body defining a second bore having one end forming a concave second truncated conical surface defining a divergent tapered surface having a second included angle that differs from said first included angle by less than 0.5 degrees;
• a second contact face located in said second bore, having a surface for contacting said first contact face, and defining a central opening;
• and,
• means for securing a conduit to said alignment body, communicating said conduit with said central opening and urging said divergent and convergent tapered surfaces and said first and second contact faces into contact.

A fused silica connector arrangement for joining capillary tubing to metallic tubing, said connector arrangement comprising:

• a fused silica body fixed to said capillary tubing at a proximate end and defining a transverse first bore in communication with a capillary bore of said capillary tubing, the distal end of said body having outer diverging and converging frusto-conical surfaces defining an enlarged distal end with said converging frusto-conical surface having an included angle of from 20.degree. to 40.degree.;
• a first contact face at the distil end of said body formed by the small end of said convergent frusto-conical surface, said contact face extending perpendicular to said first bore and having a central portion defining an opening for said first bore;
• an alignment body defining a cylindrical second bore having one end forming a concave truncated conical surface for receiving said distal end of said body, said concave truncated conical surface defining a second included angle that differs from said fast included angle by less than 0.1 degrees;
• a collar surrounding said diverging frusto conical-surface with a coincident tapered surface;
• at least one bolt extending into said alignment block and collar for urging said distil end of said body against said concave truncated surface;
• a ferrule having a cylindrical end adapted to extend into said second bore and defining a transverse third bore aligned with said fast bore and means for retaining metallic tubing, said cylindrical end deeming a second contact face at the proximate end of said ferrule adapted for sealing contact with said first contact face;
• and,
• a cap that engages said alignment block and ferrule to urge said first and second contact faces into contact.