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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5794549 | Combustion optimization system Information relating to combustion conditions within a fossil-fueled boiler that includes a plurality of burners adapted to produce flames combining to form a fireball is provided by acquiring data relating to the physical and temperature characteristics ... | 08/18/1998 |
| 5280756 | NOx Emissions advisor and automation system A method and system for controlling and providing guidance in reducing the level of NOx emissions based on controllable combustion parameters and model calculations while maintaining satisfactory plant performance and not causing other harmful ... | 01/25/1994 |
| 5277134 | Coal mill control process The temperatures of the primary carrier gas supplied to a coal pulverizer and the fuel stream discharged from the pulverizer are controlled to keep the fuel stream temperature within a predetermined safe and efficient operating range regardless of the rat... | 01/11/1994 |
| 4928604 | Control system for pulverized coal fired boiler A control system for a pulverized coal fired boiler provided with a pulverized coal producing equipment including a coal feeding section, a milling section and a classifying section and an adjuster for adjusting a coaling rate thereof, and a pulverized co... | 05/29/1990 |
| 4697530 | Underfed stoker boiler for burning bituminous coal and other solid fuel particles An automatic stoker boiler has a heat transfer compartment above a combustion chamber which is divided by a horizontal partition inclined upwardly from the rear end of the boiler towards but terminating short of the front end thereof to provide a restrict... | 10/06/1987 |
| 4635567 | Monitoring of burner operation Three burners are supplied with pulverized fuel entrained in air from a splitter and are brought to combustion under optimum conditions by adjustment of the secondary air flow to each. The rates of flow of primary and secondary air are determined and sign... | 01/13/1987 |
| 4620491 | Method and apparatus for supervising combustion state This invention relates to the supervision of a combustion state of a combustion furnace. A flame formed concentrically with the direction of a fuel jetted from a burner being the center is measured from its side, and two oxidizing flame zones as high lumi... | 11/04/1986 |
| 4598648 | Fire failure safety control for stokers A control circuit for a stoker-fed heating system is effective, whenever the primary sensing control (thermostat or aquastat) of the system calls for heat, to determine whether there is sufficient fire in the furnace to assure maintained combustion, and i... | 07/08/1986 |
| 4517902 | Control circuit for a solid fuel furnace A control circuit for a solid fuel furnace which includes a combustion chamber, means for delivering solid fuel to the combustion chamber, and means for delivering combustion air to the combustion chamber, wherein the control circuit includes thermo-sensi... | 05/21/1985 |
| 4368678 | Injection of pulverized material into a pressurized furnace A fuel stream comprising a combustible pulverized material entrained in a carrier gas is formed and subsequently injected into a blast furnace with the hot blast air without any detrimental effect on the hot air blast and with minimum energy consumption. ... | 01/18/1983 |
| 4173188 | Coal firing systems for kilns Coal particles are discharged from a hopper into a common, vibrating feed pan which, in turn, distributes the particles evenly across the surface thereof and delivers the particles along the length thereof to a metering trough positioned below and along a... | 11/06/1979 |
