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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 4976611 | Method and apparatus for the thermal treatment of waste materials In a method for the thermal treatment of wastes (combustible, poorly combustible and incombustible), especially those which cannot be harmlessly dumped, air is preheated in a first regenerator (2) to a temperature of 800° to 1200° C. and fed through a f... | 12/11/1990 |
| 4806098 | Heat transfer and stabilizing apparatus A metal compressible bellows-type container or canister is used in a hot uniaxial pressing process with a mixture of high level radioactive nuclear waste material and a synthetic rock forming material filling the canister. The canister has a bottom wall, ... | 02/21/1989 |
| 4460335 | System for preventing excess pressure in a gap between a double-shell structure of a blast heating apparatus A blast heating apparatus includes an inner metal shell and an outer metal shell defining therebetween a gap filled with at least one pourable dry material, for example a mixture of SiC and graphite. To prevent excess pressure in the gap and to prevent co... | 07/17/1984 |
| 4435157 | Heat exchanger construction and method of operation A heat exchanger and especially a blast preheater (or cowper) for blast furnaces with refractory lining, insulating layer and steel jacket is described, the insulating layer of which is designed so that a steel jacket temperature of from 20° to 60° C. c... | 03/06/1984 |
| 4334861 | Method and apparatus for generating a hot air blast A system to supply high temperature blast air and a method for providing preheating of a cold air blast by gas-to-air heating in a tube-type heat exchanger with heat from waste products of combustion. Such combustion products are recovered in a header by ... | 06/15/1982 |
| 4311456 | Blast furnace stove A vertically-fired blast furnace stove includes a mixing bed comprised of a multitude of spheres, cylinders or berl saddles supported by a carrier having openings therein located in the bottom portion of a vertically-extending combustion chamber. The bed ... | 01/19/1982 |
| 4145033 | Hot blast stove and method of operation Intercrystalline stress corrosion of the walls of heat exchangers employed to produce hot air for injection into a blast furnace, particularly the wall of the passage interconnecting the combustion and heat exchange chambers, is avoided by eliminating pre... | 03/20/1979 |
| 4022573 | Hot blast stove and method of operation Intercrystalline stress corrosion of the walls of heat exchangers employed to produce hot air for injection into a blast furnace, particularly the wall of the passage interconnecting the combustion and heat exchange chambers, is avoided by eliminating pre... | 05/10/1977 |
| 3966393 | Hot blast stove apparatus A hot blast stove apparatus comprising a hot blast stove having a discharge passage for hot blast gases, and a temperature equalizer material in the passage such that the hot blast gases discharged from the hot blast stove, gradually lowering in temperatu... | 06/29/1976 |
