F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
26/145, 113/90
F28F 9/18 (2006.01) B23K 1/00 (2006.01)
Patent
CA 1090990
Abstract of the Disclosure A set of metal heat exchange tubes is simultaneously brazed into a metal tube sheet more rapidly and with greater uniformity by holding tube-and-sheet assembly under radiant heater with sheet essentially horizontal and carrying brazing metal, and forcing gases from above tubes down into tubes as assembly is heated. Heater can envelope the top and sides of the sheet, or can have flat heating surface, but is preferably a ceramic fiber gas burner. Such burner, for this or other uses, can have ceramic fiber mat fitted over a combustion mixture plenum with margin of mat sealed by a high-temperature-resistant impregnant that fills its pores. Burner can be divided into two portions using a single ceramic fiber mat and separate combustion mixture supplies, with non-combusti- ble gas fed through one portion when other portion is the only one operating.
280951
Smart & Biggar
Smith Thomas M.
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