Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1984-11-09
1986-03-25
Camby, John J.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432241, 432249, 432251, F27B 916, F27D 312, F27D 2300, F27D 100
Patent
active
045780315
ABSTRACT:
An upper furnace portion (A) includes side walls (12, 14) extending along its lower edge. A dimensionally stable furnace hearth (B) is movably mounted adjacent the furnace lower edge and is displaced a small distance from the side walls, such that the hearth is movable without engaging the side walls, yet sufficiently close that relatively little heat tends to pass between the hearth and the side walls. The hearth includes a metal base plate (20) to which a plurality of vertically extending anchoring plates (26) are connected and supported by gussets (30). A plurality of wires (28) are welded to the anchoring plates and extend into peripheral refractory elements (24) which are integrally molded to the wires and the anchoring plates. A plurality of refractory slabs (34) and bricks (36) are supported by the base plate and are disposed within an area defined by the peripheral refractory elements to define a workpiece supporting surface. A plurality of expansion joints (32) permit the peripheral refractory elements to be constrained against outward or radial movement, and a plurality of expansion joints (32 ) accommodate circumferential or longitudinal expansion. Further expansion joints (38, 40) extend within the peripheral refractory elements and through the refractory slabs and bricks (34, 36) to permit thermal expansion thereof.
REFERENCES:
patent: 1824917 (1931-09-01), Morris
patent: 2074662 (1937-03-01), McLay
patent: 3378242 (1968-04-01), Cone et al.
Johnson Keith A.
Kamlani Vijay M.
Camby John J.
Midland-Ross Corporation
Switzer H. Duane
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