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| Number | Title | Issue Date |
| 4377739 | Average power control apparatus and method A power control method and apparatus maintains a constant average power at an electrical load, such as a fuser in an electrophotocopy machine. A power monitor measures the average power delivered to the load and compares the measured power to a predetermi... | 03/22/1983 |
| 4377738 | Method of controlling the temperature of an electrically heated element The temperature of an electrically heated element is controlled by applying a current until the element reaches a threshold temperature, preferably determined by the expanded length of the elements, and then applying a predetermined voltage-current condit... | 03/22/1983 |
| 4374321 | Automatic temperature controller for an electrophotographic apparatus fuser and method therefor A copier fuser roll's temperature is accurately maintained by supplying selected half-cycles of current from a power supply to a heater in accordance with signals from a temperature sensor. Each sequential half-cycle is assigned a unique digital input num... | 02/15/1983 |
| 4370536 | Efficiency adaptive EDM apparatus and method An EDM apparatus provided with an adaptive self-correcting system for achieving optimum maximum efficiency of machining operations. As the machining performance factor or index of an EDM apparatus continuously varies as a function of one of the machining ... | 01/25/1983 |
| 4359626 | Electric blanket heating control with capacitance sensing An electric blanket control effective to deactivate power to the blanket's resistance wire heating circuit, the control having a capacitance detector constructed and adapted to respond to differences in the capacitance of the heating circuit attributable ... | 11/16/1982 |
| 4354088 | Gas shielded welding torch Disclosed herein is a gas shielded welding torch of the TIG type, having a removable head portion to readily accommodate heads of different angular configurations. The torch includes a body portion which can be either air or water cooled, a removable head... | 10/12/1982 |
| 4354095 | Infrared heating apparatus for heating web-like material An apparatus for heating a sheet- or web-like material during its passage through a processing machine. The apparatus is provided with at least one heating panel which faces the path of travel of the material and is equipped with a number of infrared-radi... | 10/12/1982 |
| 4352000 | Induction heating cooking apparatus An induction heating cooking apparatus comprises a self-controlled inverter which comprises a series connection of an induction coil and a switching element, a resonance capacitor connected in parallel with the switching element, and a flywheel diode. An ... | 09/28/1982 |
| 4350866 | Discharge device and method for use in processing semiconductor devices An electrical discharge is applied to a wafer mounted in a wafer holder. The wafer includes at least one conducting region covered by an insulating layer. The discharge causes a conductive channel from the conductive region through the insulating layer. T... | 09/21/1982 |
| 4350864 | Traveling wire EDM apparatus with automatic wire rethreading mechanism An automatic wire rethreading mechanism for traveling wire EDM apparatus wherein the workpiece is cut by electrical discharges by an electrode in the form of a wire, comprising a mechanism for automatically threading the electrode wire through a pre-drill... | 09/21/1982 |
| 4350860 | Heating apparatus with sensor Heating apparatus equipped with a sensor element for sensing or estimating the state of a substance being heated, for example, a temperature probe containing a temperature sensor such as a thermistor in one end of a metal tube or a humidity sensor sensiti... | 09/21/1982 |
| 4350863 | High-frequency power feeder circuitry and supply for electrical discharge machining An EDM method and apparatus for supplying successive trains of discrete elementary machining pulses to an EDM gap wherein a high-frequency AC power generally of the frequency of the discrete elementary machining pulses is generated in a high-frequency gen... | 09/21/1982 |
| 4349726 | Control device for electric heating apparatus The control device has a power regulator for the timed power to the heating system of the electrical apparatus. The heating system is provided with a temperature sensor which, up to a given desired temperature, bridges the power regulator with the aid of ... | 09/14/1982 |
| 4348583 | Rapidly-heated periodically-maintained heater for motor vehicle apparatus A heating device for use in motor vehicles to rapidly heat combustion chambers, exhaust gas sensors, catalyzers and other associated apparatus. A resistive heating element is connected in series with a low-impedance measuring resistor and a switch across ... | 09/07/1982 |
| 4348577 | High selectivity plasma etching method A parallel-plate type gas plasma etching apparatus for etching a workpiece having a multilayer structure having a high etch rate ratio. A pair of parallel-plate electrodes are disposed in a reactor. A workpiece to be etched is disposed upon one of the ele... | 09/07/1982 |
| 4347418 | Heat-cooking apparatus incorporating infrared detecting system A heat-cooking apparatus such as an electronic oven of the type having an oven cavity, a heat source, an infrared detecting equipment adapted to detect the rate of radiation of the infrared rays from the surface of the material under cooking and a control... | 08/31/1982 |
| 4347430 | Vapor generator with cycling monitoring of conductivity A water vapor generator having electrodes in a vaporization vessel is disclosed. Current passed through the water between electrodes causes water in the vessel to heat and boil off as steam, make-up water being added when the current drops below a preset ... | 08/31/1982 |
| 4346280 | Method and apparatus for building up surface layer with alternating composition A method comprises feeding two or more, if necessary, alloying materials and simultaneously changing the ratio thereof. The ratio of the alloying materials is changed at the moment of transition from one section to the other one having different compositi... | 08/24/1982 |
| 4345137 | Method of welding several optical fibers end to end in layers and a device for welding in accordance with said method A method of welding several optical fibers end to end in layers in a common welding plane. Each fiber (31) includes a bared portion and a covered portion. The method is applied by a device including: (a) a microplasma welding torch (40) with a vertical axis mo... | 08/17/1982 |
| 4343990 | Heating apparatus safety device using voice synthesizer A heating apparatus with a simplified operating panel comprising a multi-command key actively incorporating several similar functions and a voice synthesizer section such as a PARCOR synthesizer is disclosed. The accepted function of the multi-command key... | 08/10/1982 |
| 4341947 | Glow discharge heating apparatus Typically, a bottom of a cup-shaped electrode opposes to that of a similar electrode through a predetermined gap and in a mixture of helium and hydrogen. A step-up transformer connected across an AC source through a resistor applies a voltage in excess of... | 07/27/1982 |
| 4340807 | Open loop fuser control A controller having dedicated fuser circuitry and a processor for controlling the fuser heating element. The dedicated fuser circuitry interconnects an input voltage source to the processor through a low voltage power supply to provide a reference signal ... | 07/20/1982 |
| 4339649 | Apparatus and method for R-C time constant circuit In a time constant circuit of the type having a resistance capacitance circuit including a capacitor and a resistance network connected in series with the capacitor, wherein the improvement provides digital gate means having an output and at least one inp... | 07/13/1982 |
| 4338511 | Electronic thermostat equipped with an energy-saving device An energy-saving electronic thermostat operates by means of a single temperature probe. The rapid decrease in temperature of the probe when a window is opened causes the heating to be switched off or reduced by means of a comparator circuit combined with ... | 07/06/1982 |
| 4338507 | Water-quenched collection system for use with a plasma-arc torch Molten metal, slag and fumes created during the operation of a plasma-arc torch are discharged downwardly into a duct whose lower end is immersed in a tank of water. A stream of water is directed down the entire inner periphery of the duct and serves to c... | 07/06/1982 |
| 4334143 | Heater protection arrangement for a washing appliance In a washing appliance, such as a dishwasher, employing a high watt density heater for heating washing liquid in the wash chamber of the appliance, a control circuit which integrates a liquid level sensor employed for positive liquid fill control and heat... | 06/08/1982 |
| 4334146 | Method and apparatus for joining thermoplastic line elements Electric welding sleeves used more particularly with larger pipe diameters have a heating wire winding which is under compressive stress due to the shrinkage of the sleeve member. This compressive stress and the elongation of the resistance heating wire o... | 06/08/1982 |
| 4331855 | Gas sensor output/timer output controlled cooking utensil A combined microwave and electric heating oven includes a gas sensor for detecting a completion of the cooking operation, and a timer for determining a cooking time period. A selection lever is slidably secured on a control panel for selecting a desired g... | 05/25/1982 |
| 4330702 | Electronic control system for coffeemaker A coffeemaker is provided with a power circuit and a control circuit. The power circuit is connected to a household source of electric power and it is activated by a relay switch. The control circuit includes a relay coil for the switch, and a triac that ... | 05/18/1982 |
| 4330700 | Plasmaburner with contact protection There is disclosed a plasma burner which has contact protection for protecting the operator against impermissibly high voltage and the burner head itself against destruction. The plasma burner comprises a burner shaft, a nozzle and a nozzle cap surroundin... | 05/18/1982 |
| 4329561 | Method of ensuring the maintenance of constant quality of spot welds A method of improving the reproducibility of the welds in an electric spot welding machine comprises prior to the initiation of a welding operation passing a preheating current of lower magnitude than the welding current through the parts to be welded. Wh... | 05/11/1982 |
| 4329568 | Apparatus for heat treatment, particularly the asepticization, of contact lenses An apparatus for heat treatment (particularly asepticization) of contact lenses. The apparatus comprises a box having a housing adapted to receive a case for contact lenses and includes an electrical circuit comprising a power supply and at least one heat... | 05/11/1982 |
| 4329563 | Glow discharge heating apparatus Typically, a bottom of a cup-shaped electrode opposes to that of a similar electrode through a predetermined gap and in a mixture of helium and hydrogen. A step-up transformer connected across an AC source through a resistor applies a voltage in excess of... | 05/11/1982 |
| 4328407 | Heating system and control An electric heating system employs a control unit including means to connect a resistance heater to a three pole power source and a switch to switch the connections between full voltage and low voltage as temperature is more than or less than several degr... | 05/04/1982 |
| 4326113 | Heater disposed below a turntable in a combination microwave and electric oven A sheath heater is disposed below a turntable in a combination microwave and electric oven to maintain an oven temperature at a predetermined value. The sheath heater is shaped in such a manner that a loop size surrounded by the sheath heater is greater t... | 04/20/1982 |
| 4324966 | Menu responsible automatic sensor selection in a cooking utensil A microwave oven comprises a thermistor and a gas sensor disposed in an exhaustion duct for detecting an exhaustion air temperature and an exhaustion gas concentration, respectively. A menu selection manual lever is disposed on a control panel for selecti... | 04/13/1982 |
| 4324971 | Torch height acquisition using arc transfer Initial torch height is acquired by moving a plasma torch toward a workpiece while operating in a pilot mode. The downward movement of the torch is halted when a current sensing relay coupled to the main arc supply senses the transference of the main arc.... | 04/13/1982 |
| 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 |
| 4322604 | Engine start assisting device The warm-up time of a glow plug starting device in a diesel engine is reduced by using as the material for the heat generating element in the glow plug a metallic resistance material whose resistance up to the starting temperature is less than two-thirds ... | 03/30/1982 |
| 4321454 | Method of and welding torch for arc welding Plasma-MIG welding in which a thermally ionizable gas stream is flowed through a nozzle non-consumable electrode having a central orifice and a surrounding annular opening toward a workpiece and is thereby split into a central gas column enveloped by an a... | 03/23/1982 |
