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| Number | Title | Issue Date |
| 7264781 | Calcining plant and method Particulate material to be calcined is conditioned and then introduced into a stream of flue gases which transport the material along a sloping drying duct while drying the material. The dried material is then introduced into the same stream of flue gases upstream o... | 09/04/2007 |
| 7065431 | System and method for controlling temperature of a liquid residing within a tank A system for controlling a temperature of a liquid residing within a tank comprises a temperature sensor, a temperature control element, memory, and logic. The temperature sensor is configured to detect the temperature of the liquid residing within the tank, and the... | 06/20/2006 |
| 7033165 | Gas furnace controller A gas furnace controller for disrupting the flow of gas to a gas furnace upon detection of excessive levels of carbon monoxide comprises an air sample collector in fluid communication with a carbon monoxide detector, a gas supply shutoff circuit for controlling a va... | 04/25/2006 |
| 7002114 | Methods and apparatus for a variable resistor configured to compensate for non-linearities in a heating element circuit An improved variable resistor at least partially compensates for non-linearities in an electrical circuit containing a heating element, for example, a thin-film heating element. A controllable heater includes a heating element, a voltage source (for example, a stand... | 02/21/2006 |
| 6772045 | System for determining dry cleaning timing, method for determining dry cleaning timing, dry cleaning method, and method for manufacturing semiconductor device A system for determining dry cleaning timing, includes: a manufacturing apparatus configured to process materials assigned by a sequence of lots; an apparatus controller configured to control the manufacturing apparatus and obtaining operational conditions of the ma... | 08/03/2004 |
| 6725099 | Ramp rate limiter to control stress during ramping The present invention includes a method and system for limiting the ramp rate of a variable under control in order to control stress in a process or plant under control. The present invention takes a limit curve provided by the user and combines that limit curve wit... | 04/20/2004 |
| 6609906 | Adjustable ratio control system and method Systems and methods for performing adjustable ratio control for a furnace with a plurality of workpieces located within a furnace and a sensor for determining the temperature of each of the workpieces. Adjustable ratio control is performed by controlling ... | 08/26/2003 |
| 6607379 | Temperature control method in hot pressing In a known control method, a large deviation between the temperature of a heating plate and a temperature-setting pattern occurs, and an overshoot or undershoot occurs. Therefore, a workpiece is unstably formed, the number of defective parts is increased ... | 08/19/2003 |
| 6461438 | Heat treatment unit, cooling unit and cooling treatment method A substrate cooling unit comprises a cooling plate on which the substrate is placed, a cooling temperature adjusting element which adjusts the cooling plate to a predetermined temperature, a temperature controller which controls a temperature of the cooli... | 10/08/2002 |
| 6454562 | Oxy-boost control in furnaces A process controls oxy-boost firing and air-fuel burner firing in furnaces, including large glass furnaces such as float furnaces. The large side-fired regenerative float furnaces use oxy-boost firing for a variety of reasons, including production increas... | 09/24/2002 |
| 6435866 | Radiation furnace with independently controlled heating elements A radiation furnace assembly for use in heating parts. The radiation furnace assembly includes a muffle having a top side, a bottom side, and a first side wall. The muffle defines a chamber with a main heating portion and a first side heating portion. Dis... | 08/20/2002 |
| 6398547 | Oxy-fuel combustion firing configurations and methods An oxy-combustion firing configuration, process, and apparatus can reduce the consumption of oxygen and fuel in an oxy-fuel combustion processes. Processes in accordance with the present invention include operation of an automated logic control device whi... | 06/04/2002 |
| 6183562 | Thermal protection system for a chemical vapor deposition machine A thermal protection system for a chemical vapor deposition machine (CVD). The system of the present invention includes a thermal sensor for providing a temperature signal corresponding to a CVD chamber temperature, a heating component for heating the CVD... | 02/06/2001 |
| 5857847 | Brazing furnace parts feeding control A method of controlling the feeding of part trays into a roller-hearth brazing furnace includes feeding a part tray into the furnace after the expiration of a time period. The temperatures in each heating zone of the furnace are monitored. After the expir... | 01/12/1999 |
| 5807098 | Gas heater with alarm system A heater including a housing, a heating assembly having a burner, and at least one of an oxygen level detection assembly adapted to distinguish between a relatively normal oxygen level, a relatively low oxygen level and relatively unsafe oxygen, a carbon ... | 09/15/1998 |
| 5711802 | Heat treatment of lime sludge A method and plant for heat treatment of lime sludge (CaCO3) formed by the causticizing process during the manufacture of paper pulp. The lime sludge is dried and pulverized in a first process stage and preheated in a second process stage by me... | 01/27/1998 |
| 5630714 | Process for controlling combustion of burners in furnace and an apparatus therefor A process for controlling combustion of burners arranged in a plurality of respective control zones divided in a furnace, includes the step of repeating a cycle of successively subjecting the burners to combustion for a short time. At least one temperatur... | 05/20/1997 |
| 5530222 | Apparatus for positioning a furnace module in a horizontal diffusion furnace Performance of a high temperature diffusion furnace is enhanced by an improved multi-furnace module design. The furnace is constructed of materials suitable for clean room environments with an adjustable leveling frame assembly. A slide out assembly and h... | 06/25/1996 |
| 5391860 | Temperature-controlling method, for example in systems for injection of plastics materials, and respective system A method for controlling the temperature, for example in an injector of a thermoplastics injection system which uses a closed-loop servocontrol system in which the electrical heating resistor (R) is periodically deactivated for short periods of time (Vc, ... | 02/21/1995 |
| 5369597 | System for controlling heating or cooling capacity in heating or air conditioning systems A heat pump or air conditioning system includes a process for calculating on a real time basis the capacity contribution of each of a number of heating or cooling stages. The calculated contribution is utilized to determine the number of stages that need ... | 11/29/1994 |
| 5040972 | Pyrolyzer-kiln system A pyrolyzer-kiln system for generating combustible fume from waste material and supplementing the fuel used to provide heat energy to a clinker kiln. The system includes a pyrolyzer for generating a combustible pyrolytic fume, a kiln for burning the fume ... | 08/20/1991 |
| 4797776 | Furnace temperature safety system A system to continually monitor the integrity of control and safety thermocouples within a furnace comprising a low furnace temperature reader connected in parallel with a high furnace temperature reader to a single safety thermocouple.... | 01/10/1989 |
| 4752219 | Wafer softlanding system and cooperative door assembly A wafer softlanding system and cooperative door assembly are disclosed for gently and reliably loading and unloading a batch of wafers onto and off of the floor of a processing furnace tube. The disclosed softlanding system is coupled to a wafer receiving... | 06/21/1988 |
| 4720261 | Explosion relief panel A high-temperature, rapid-cycle pin oven for the curing of coatings on hollow container components, includes an oven unit (2) whose housing (14) is divided into three compartments interconnected by internal explosion relief panels (136,142,144). One of th... | 01/19/1988 |
| 4609343 | Temperature distribution regulating sample holder-adapter for forming conditions for gradient heat treatment in heat treatment ovens or furnaces The invention concerns a temperature distribution controlling sample holding adaptor for setting up gradient heat treatment conditions in heat treatment ovens, which has a sample holder for realizing temperature distribution and setting and adjustment uni... | 09/02/1986 |
| 4602904 | Method of obtaining temperature of an object being heat treated The present invention provides a method and apparatus for determining the temperature of an object as it moves through a heat treating furnace. The furnace includes a hearth adapted to move through it thusly enabling a number of objects placed on the hear... | 07/29/1986 |
| 4588376 | Electric signal transfer systems A rotary kiln has a number of thermocouples respectively sensing the kiln temperature at spaced locations and respectively connected to annular slip rings each in kiln sections. Laterally facing peripheral surfaces of the rings are respectively cooperable... | 05/13/1986 |
| 4543891 | Apparatus and process for heat treatment Apparatus and process is disclosed for heat treating of material in a furnace comprising a fan driven by an electric motor, a load sensor which senses the motor load and a speed controller responsive to the load sensor signal for controlling the speed of ... | 10/01/1985 |
| 4533319 | Method of and apparatus for monitoring a rotary kiln assembly A problem that can occur with a large rotary kiln assembly is that it can move out of position or seals can become defective, making an escape of materials possible. The present invention provides transducers (10, 15) for detecting movement of the rotary ... | 08/06/1985 |
| 4500950 | Industrial process control apparatus and method The present control apparatus and method for controlling a plurality of intercoupled industrial process operations each having an operation control member. The control member position correction is implemented in accordance with a predetermined characteri... | 02/19/1985 |
| 4489376 | Industrial process control apparatus and method The present control system and method for controlling the combustion chamber pressure in a non-linear combustion process is operative in relation to one or more combustion chambers each having a flue gas damper. In the case of a plurality of such chambers... | 12/18/1984 |
| 4489375 | Industrial process control apparatus and method A control system and method are provided for an industrial process operation, wherein a controller is coupled with a process control member and has a gain that is adjustable in accordance with a predetermined relationship of the controller reference itera... | 12/18/1984 |
| 4487575 | Method and apparatus for monitoring rotary drums during thermal processing A method and apparatus for monitoring the operation of a rotary drum such as a rotary kiln while engaged in thermal processing of fine grained materials such as cement which involves measuring the temperature distribution existing instantaneously during s... | 12/11/1984 |
| 4474825 | Monitoring temperature of wire during heating Temperature monitoring of electrically conductive wire during heating in which the current in the wire in the heating zone is measured and the voltage at the downstream end portion of the zone is measured, signals corresponding to the measured values then... | 10/02/1984 |
| 4468195 | Thermal treatment apparatus The semiconductor device manufacturing process for producing semiconductors (transistor, IC, LSI or the like) needs a large number of thermal treatments for semiconductor wafers, such as thermal oxidation, diffusion, CVD, annealing or the like. The above-... | 08/28/1984 |
| 4461616 | Ceramic heat treatment regulating apparatus and method An efficient method for using a periodic kiln to heat ceramic material to a state of maturation, and the apparatus for carrying out the method, duplicate the action of pyrometric cones. In a microcomputer, data is stored describing the relationship betwee... | 07/24/1984 |
| 4452585 | Combustion air blower surge control for a melting furnace Disclosed is a surge control method and apparatus for a combustion air blower used with a metal melting furnace which includes a variable restriction on the blower inlet regulated by a pressure sensing means near the blower outlet.... | 06/05/1984 |
| 4439143 | Heat roller fixing device A heat roller fixing device comprising a changeover arrangement to be selectively changed over in accordance with thickness of a copy paper, and a control circuit for causing a heating roller and a pressure roller in pressure contact with the heating roll... | 03/27/1984 |
| 4424023 | Method and apparatus for temperature control in heating furnaces A method is disclosed for temperature control in a heating furnace including a step of regulating the emissivity of the flame in the heating furnace. This regulation is accomplished by adjusting the soot content of the flame. The soot content is changed b... | 01/03/1984 |
| 4416623 | Muffle furnace Muffle furnace having an elongated metallic muffle extending through several heating zones of the furnace. Temperature of muffle is measured at different parts thereof. In order to minimize the difference of temperature which causes the deformation of muf... | 11/22/1983 |
