Furnace preheater
AssigneeFisher Scientific Company
InventorsSolomon Jarmell, Barry E. Rodgers
Life of this patent
Estimating the term…
Abstract
A preheater suitable for a laboratory furnace provides improved furnace temperature uniformity and atmosphere control. The preheater comprises a rectangular chamber which is adapted to be placed in the bottom of the furnace chamber. The preheater includes a pair of longitudinal passageways on opposite sides of the preheater chamber. There is a plurality of perforations in the top wall at one end of the preheater and along each passageway for distributing preheated air or other gas into the furnace chamber. In a preferred embodiment, the preheater is made of stainless steel, and the preheater chamber contains stainless steel wool which aids in heat transfer.
Claims14
A preheater for a furnace chamber comprising:
- A. a rectangular chamber defined by two sidewalls, two end walls, a top wall and a bottom wall, one end wall having an opening for admitting air or gas to the preheater;
- B. a pair of passageways extending between the top and bottom walls along opposite sides of the preheater chamber, each of said passageways being closed at an end adjacent said opening;
- and
- C. a plurality of perforations in the top wall of the preheater at an end opposite said opening and along each passageway for distributing preheated air or other gas into the furnace chamber.
In a laboratory furnace, a preheater for heating air or other gas forced into the furnace chamber, said preheater comprising:
- A. a rectangular chamber defined by two sidewalls, two end walls, a top wall and a bottom wall, one end wall having an opening for admitting forced air or gas to the preheater;
- B. a pair of passageways formed by a pair of ribs extending substantially parallel to but spaced from the sidewalls along the length thereof and partially through the chamber between the top and bottom walls thereof along opposite sides of the preheater chamber, each of said passageways being closed at an end adjacent said opening;
- and
- C. a plurality of perforations in the top wall of the preheater at an end opposite said opening and along each passageway for distributing preheated air or gas into the furnace chamber.
Dependencies are inferred from the claim text.