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| Number | Title | Issue Date |
| 4982347 | Process and apparatus for producing temperature profiles in a workpiece as it passes through a belt furnace A given target temperature profile T is produced in a workpiece as it passes through an elongated passageway of a belt furance by the steps of: (1) determining a set of temperature setting TSX for the belt furnace thermostats which satisfy an e... | 01/01/1991 |
| 4907177 | Computerized multi-zone crystal growth furnace precise temperature and heating control method A computerized method of digitally controlling the temperature profile of a heated article in which the temperature profile is defined by a plurality of temperature zones spaced about the article. The temperature profile of the article is monitored and a ... | 03/06/1990 |
| 4817009 | Furnace zone temperature control A computer system for a zone fired furnace generates a plurality of temperature set point signals for a plurality of furnace zones. The set point signals are derived from a master controller acting on the measured temperature of fluid that is heated in th... | 03/28/1989 |
| 4781324 | Preheat temperature balancing control A supervisory computer automatically equalizes the temperature of effluent streams of a multipass heating system to maximize heat transfer, without substantially disturbing a desired total flow through the heating system. Temperature control is achieved b... | 11/01/1988 |
| 4380317 | Furnace control In a process in which a furnace having multiple coils is utilized to heat a fluid stream, a comparison of a measured pressure of the fluid stream to a desired pressure is utilized to bias a temperature control system for the furnace which maintains the fu... | 04/19/1983 |
| 4323763 | Parametric power controller Disclosed is a vacuum furnace temperature controller for the stable regulation of temperature over a wide range of temperatures. The control loop includes a multiplier responsive to the desired temperature which modifies the overall loop gain and the maxi... | 04/06/1982 |
| 4144997 | Control of multiple fuel streams to a burner The control of the flow rates of multiple fuel streams to furnace burners is accomplished by manipulating the flow rate of each fuel stream in response to a calculation of the heat duty which must be supplied by the respective fuel stream. Where the suppl... | 03/20/1979 |
| 4141539 | Heat treating furnace with load control for fan motor Gas is circulated within the chamber of a heat treating furnace by a fan which is driven by an electric motor. The current drawn by the motor is detected and, when the current exceeds a predetermined magnitude, the density of the gas in the chamber is red... | 02/27/1979 |
| 4060377 | Temperature monitoring furnace Apparatus for monitoring product temperature in a furnace, the furnace being of the open ended and secondary emission type, and having a plurality of serially arranged heating zones therein, each of the zones being adjustably heated. The furnace includes ... | 11/29/1977 |
| 4031950 | Process fluid circulation and temperature control system A process liquid circulation and temperature control system including a pump for circulating water or other process liquid through a path including a heating unit, a cooling unit, and a process apparatus that is returned to the pump; the pump and the heat... | 06/28/1977 |
| 3967614 | Gas fired fusion furnace and fusion head assembly In an assembly of fusion furnace and fusion head for applying heat to plastic pieces to be fused, the furnace being fired with gaseous fuel fed through a conduit to a burner head in the furnace from a source of fuel, a temperature sensing probe projects i... | 07/06/1976 |
