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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 |
| 7289032 | Intelligent flame scanner Techniques for determining a characteristic of a flame are provided by the present invention. Provided are methods as well as devices. A flame is monitored across a contiguous spectral range to detect light emitted by the monitored flame. The contiguous spectral ran... | 10/30/2007 |
| 6461154 | Method for burning carbonate-containing material In a method for burning carbonate-containing material the latter moves as a result of gravity in counter-current to the cooling and combustion air through a shaft kiln. The fuel supply takes place by means of burning lances introduced into the granular bu... | 10/08/2002 |
| 6419481 | Cooler for rotary kilns The present invention relates to a cooler (2) for a rotary drum kiln (1). The cooler comprises two cylindrical housings disposed one inside the other (6, 7), surrounding the kiln and rotating with it, which housings are mounted at the discharge end of the... | 07/16/2002 |
| 6312252 | Cooler for combustion products Cooler for combustion products, with a conveyor through which air flows, which cooler is formed by a stationary grate surface (7) and a conveyor (8). The conveyor contains a plurality of drivers (9) moved at a distance from one another over the grate surf... | 11/06/2001 |
| 5476377 | Method and grate cooler for hot bulk material The invention relates to the cooling of hot bulk material, particularly cement clinker, ore material or the like, in a grate cooler, in which the bulk material is transported on the cooler grate surface toward an outlet and exposed to cooling gas from bel... | 12/19/1995 |
| 5093085 | Fluidized bed reactor method and apparatus Fluidized bed reactor method and apparatus for removal of coarse material from the reactor. The apparatus comprises a discharge device including a substantially vertical pipe portion connected at one end with an outlet opening in the reactor grid, and at ... | 03/03/1992 |
| 4728287 | Apparatus for uniformly drawing and cooling pyroprocessed particulate material Apparatus for cooling a bed of pyroprocessed particulate material such as lime received from a source as a kiln, the cooler including a shaft with one or more underlying hoppers through which the material flows as cooling air is forced upwardly therethrou... | 03/01/1988 |
| 4708196 | Shaft cooler for the dry quenching of coke A shaft cooler for dry quenching of coke includes an inner masonry ring that is an independent structure suspended on the top edge of the outer masonry of the shaft cooler. The weight of the inner masonry ring is carried by stays which bear on the top edg... | 11/24/1987 |
| 4680009 | Apparatus for removing oversize from the hot material discharged from a rotary kiln used to produce sponge iron by a direct reduction of iron oxide containing materials The discharge end of the rotary kiln (24) is surrounded by and gas-tightly sealed to a stationary kiln head (2), which contains a rigid, cooled, inclined grate (1). A container (3) for collecting oversize is mounted on the kiln head (2) and is provided at... | 07/14/1987 |
| 4431407 | Process for burning limestone, dolomite or the like and annular shaft furnace for performing the same A process for burning and sintering material in lump form in a shaft furnace in which part of the cooling air flowing in a counterflow through the cooling zone is removed from the shaft furnace before the upper end of the cooling zone and is introduced in... | 02/14/1984 |
| 4403951 | Shaft furnace for burning or firing and sintering material in lump form or pellet form and with an internal burner A shaft furnace for burning or firing and sintering material, such as limestone, dolomite, etc in lump or pellet form, in which the cooling air is introduced into the external cooling air duct in the vicinity of the furnace bottom, flows upwardly through ... | 09/13/1983 |
| 4365953 | Cooler for combustible material A cooler for combustible material has a first section of cooling grate which is traversed by a cooling air that is fed completely to a burner as air for combustion, and has a further section likewise traversed by cooling air under the effect of at least o... | 12/28/1982 |
| 4360976 | Dry cooling of coke A method and apparatus for the dry cooling of coke is disclosed wherein a cooling gas is routed through a coke charge by means of a distributor or manifold disposed in the bottom of a vertical cooling chamber. The gas passing upwardly through the coke cha... | 11/30/1982 |
| 4352661 | Shaft kiln Air heated outside the calcining zone of a shaft kiln is passed through raw material in a hopper mounted above the kiln in order to preheat the raw material. In one embodiment the preheating air is heated by an excess air burner which communicates with th... | 10/05/1982 |
| 4315735 | Process for calcining mineral raw materials in a uniflow regenerative shaft furnace Either sulphur-containing raw materials or sulphur-containing fuels may be used in the calcination of mineral raw materials in a calcining furnace, with significant desulphurization of the calcined material being achieved if, on the one hand, cooling air ... | 02/16/1982 |
| 4277235 | Process of producing cool agglomerated solids In a process and plant for producing cool sintered particulate agglomerated solids of ore, the solids are moved in a continuous stream through a heat-treating zone to form a layer of the agglomerated solids and hot particles thereof are obtained from the ... | 07/07/1981 |
| 4002422 | Packed bed heat exchanger Apparatus for treating particulate material with hot gases wherein preheated gases are introduced to the particulate material to heat and treat such material and a second cooler gas is introduced to the heated material to impart some cooling to the materi... | 01/11/1977 |
