Patent ID: 8758673
Filing Date: 2014-06-24
Classification: F27B,F27D

Abstract:
1. A portable thermal oven for melting gold and other precious metals, said oven comprising: a metal frame, means for supporting said frame above the level of a floor and a plurality of insulating terracotta plates disposed in said frame and defining an enclosed chamber having a front panel, a rear panel, two opposite side panels, a top panel, a bottom panel and a lower portion; a terracotta door having four sides hingedly disposed in said front panel along one side thereof and including a handle on one side thereof for opening and closing said door; a plurality of gas manifolds and a plurality of gas burners disposed on each of said opposite sides of said chamber and a ventilation hatch in said top panel for exhausting excess heat and fumes from said furnace; a first gas cylinder containing a supply of flammable gas and a pipe connecting said first gas cylinder to said manifolds; a supply of air or oxygen and means for feeding said air or oxygen into said furnace; control means for regulating the flow of gas and the amount of air and/or oxygen from said gas cylinder and said supply of air and oxygen to said manifolds for ignition in said burners; a support member for receiving a mass of gold or precious metal for melting disposed in said lower portion of said chamber and including a plurality of passageways extending therethrough; and a cone shaped terracotta lined receptacle disposed in said bottom of said chamber and extending through said bottom panel with a larger portion thereof adapted to receive molten metal therein and said bottom portion of said cone-shaped receptacle adapted to direct molten metal into a mold.