Leonard P Nowak

Author:

Leonard Nowak

ISBN #:

8386336242

US Patent:

41658655, Aug 28, 1979

Filed:

Mar 1, 1978

Appl. No.:

5/882512

Inventors:

Leonard G. Nowak - Ypsilanti MI
Maurice Nunes - Arlington MA
Paul K. Shefsiek - Farmington MI

Assignee:

Holcroft and Company - Livonia MI

International Classification:

F27B 1402
F27B 1414

US Classification:

266138

Abstract:

A crucible furnace for high-temperature melting of metals or other materials which includes a capped vessel for serving as a crucible to hold a charge of material to be melted, a solid baffle surrounding and closely spaced from the vessel to form a restricted passageway and a refractory wall surrounding and widely spaced from the baffle to form a combustion chamber. Fuel is supplied at the base of the combustion chamber and mixed with air preheated by a compact internal recuperator operative from exhaust gases exiting the restricted passageway. The fuel is burned in the combustion chamber, heating the baffle which in turn radiates heat to the vessel containing the charge. Several of the elements forming the combustion and heat transfer system also serve as structural elements providing rigid support to internal components when the furnace is upright and when it is tilted to pour off melt. Adjacent its top, openings are formed through the baffle to permit flame and combustion products to pass from the combustion chamber downwardly through the restricted passageway and recuperator region to the exhaust flue. Thus, heating of the vessel is also had by convection.

US Patent:

40982556, Jul 4, 1978

Filed:

Sep 7, 1976

Appl. No.:

5/721139

Inventors:

Leonard G. Nowak - Ypsilanti MI
Paul K. Shefsiek - Farmington MI

Assignee:

Thermo Electron Corporation - Waltham MA

International Classification:

F24C 300

US Classification:

126 91A

Abstract:

A radiant tube burner mixes liquid fuel and/or gaseous fuel with air for combustion in a radiant tube to produce a quiet and stable luminous flame through the entire length of the radiant tube. A flame holding plate is positioned within the radiant tube to define a feed zone and a combustion zone. A liquid fuel nozzle positioned centrally in the plate directs fuel through the plate and into the combustion zone. The plate defines a series of apertures circumscribing the nozzle and another passage outward from the series of openings and concentric therewith. Combustion air is proportioned and admitted to the combustion zone through the series of openings and the passage. Gaseous fuel may be admitted to the combustion zone through the series of openings.