Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7246938 | Apparatus and method for measuring the heating value of gases A heating value meter for gases has an outer cylindrical mantle with an outer thermostatic heating apparatus and at least one inlet for introduction of air and at least one inlet for introduction of test or calibration gas. The outer mantle has an outer heating mant... | 07/24/2007 |
| 7188637 | Methods, systems, and articles for controlling a fluid blending system Described herein are methods, systems, and articles that are useful for controlling a fluid blending system, such as a fluid utility system. The methods, systems, and articles of this invention allow for the control of both a quantity metric (e.g., pressure) of the ... | 03/13/2007 |
| 6571817 | Pressure proving gas valve A pressure proving gas valve insures safe and efficient operation of a fuel-burning appliance by monitoring combustion air pressure and appropriately controlling the valve based upon this air pressure. An air pressure sensor is incorporated into a pressur... | 06/03/2003 |
| 6371147 | Evaluation and regulation of the thermal power of a flow of combustible gas; characterization of a thermal mass flowmeter The subject of the present invention is: processes for the evaluation and the regulation, to a value P0, of the net (or gross) thermal power P of a flow of a combustible gas CG of composition close to that of a reference gas, said flow of gas passin... | 04/16/2002 |
| 5265635 | Control means and method for controlling feed gases A hot feed gas is controlled by utilizing a nuclear magnetic resonance analyzer to analyze the composition of the gas and to provide at least one corresponding composition signal. A valve controls the flow of the gas in accordance with a control signal. A... | 11/30/1993 |
| 4459098 | Method and apparatus for controlling secondary air distribution to a multiple fuel combustor Method and apparatus for controlling the distribution of secondary air (30) between at least two fuel burners (14,16) in a multiple fuel combustor (16). Total chemical energies of the individual fuel streams (44,60) are determined and compared (64,66) wit... | 07/10/1984 |
| 4369803 | Control of fuel gas blending In a process in which a fuel gas stream having a high BTU content is mixed with a fuel gas stream having a low BTU content to form a mixed fuel gas stream, the flow rate of the high BTU content fuel gas stream is manipulated to maintain a desired BTU cont... | 01/25/1983 |
| 4249886 | Combustion control system The well-known "Jack-shaft" or "Single-point" positioning or a two-point parallel combustion control system has been modified by a trim link member articulated on the master arm to introduce a phase angle between the master arm associated with fuel supply... | 02/10/1981 |
| 4157238 | Control system for combustion apparatus and method Apparatus and method for changing the calibrated linkage relationship between two flow control devices of combustion apparatus without impeding the normal operation of the associated process. Means are provided, responsive to remote, manual or automatic c... | 06/05/1979 |
| 4118172 | Method and apparatus for controlling burner stoichiometry The ratio of fuel to oxidant in a gas mixture to main burners in a furnace, wherein the fuel is of variable composition, is controlled to a predetermined level by burning a portion of the fuel in a control burner, adjusting the oxidant to obtain a ratio o... | 10/03/1978 |
| 4095930 | Fuel burning system A system for burning two fuels in a burner wherein the second fuel is available in varying amounts. In response to the sensing of the available supply of the second fuel and the sensing of the total fuel required to be supplied to the burner, the system p... | 06/20/1978 |
