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| Number | Title | Issue Date |
| 7885520 | Dual element heater element for vending apparatus and method therefor A dual heater element for heating a liquid for use in a vending apparatus is provided. The heater element includes two elements. A first heating element is operable for use at a conventional first operating voltage or range (e.g., 120 VAC) while a separate second he... | 02/08/2011 |
| 7328653 | Industrial apparatus for applying radio-frequency electromagnetic fields to semiconductive dielectric materials Industrial apparatus for applying radio-frequency electromagnetic fields to semiconductive dielectric materials comprises a radio-frequency voltage generator and an applicator device for applying radio-frequency electromagnetic fields. The applicator device comprise... | 02/12/2008 |
| 7263283 | Electronic thermostat for liquid heating apparatus An electronic thermostat (20) has a mechanical switch (22) and a solid-state switch (24). The electronic thermostat (20) is suitable for use in a liquid heating apparatus, such as a coffee maker or any other apparatus that dispenses heate... | 08/28/2007 |
| 7236692 | Spa heater system and methods for controlling A spa system comprises an electrically powered heater. The electrically powered heater comprises a heating element capable of drawing a rated current when switched on to an AC line voltage. An electronic control system is programmed to control the heating element to... | 06/26/2007 |
| 7171111 | Method of heating water with rod shaped electrodes in a two-dimensional matrix An improved scheme for dissociating water into hydrogen and oxygen is provided in which a two dimensional matrix of electrodes is provided in a reaction vessel. The electrodes are connected to a source of electrical power for providing a potential difference there b... | 01/30/2007 |
| 7112768 | Temperature control system for a bathing unit A temperature control system for a bathing unit that includes a water holding receptacle and a heating module. The temperature control system comprises a plurality of actuators associated to the heating module and a temperature regulation device in communication wit... | 09/26/2006 |
| 6728602 | Control system for an electric heater A control system for an electric heater, e.g., an electric catalyst heater (ECH), includes a current sensor, a voltage sensor, a switching element, and a control circuit. The control circuit is coupled to the current sensor, the voltage sensor and a control terminal... | 04/27/2004 |
| 6509557 | Apparatus and method for heating single insulated flowlines Apparatus and method are provided for electrically heating subsea pipelines. An electrically insulating layer is placed over the pipe in the segment of the pipeline to be heated and electrical current is caused to flow axially through the steel wall of th... | 01/21/2003 |
| 6437300 | Method and apparatus for compensating for varying water conductivity in a direct electrode water heating vaporizer A vaporizer that adjusts to the conductivity of the water used in the vaporizer, and that also adjusts to changes in the conductivity of the water while in operation, thereby decreasing warm-up time and maintaining a relatively constant boiling rate and r... | 08/20/2002 |
| 6130990 | On-demand direct electrical resistance heating system and method thereof A liquid heater includes an electrical power supplier and a heating passage configured to receive unheated liquid. The heating passage is defined by a first electrode and a second electrode. The first and second electrodes are electrically connected to th... | 10/10/2000 |
| 5903709 | Electrode-type steam production device with automatically controlled water inlet and outlet valves Electrode elements directly heat water and with an electric current controller that is controlled by the heated water volume, which structurally enables immediate production of high temperature steam. The innovations of the invention here include: the uti... | 05/11/1999 |
| 5758015 | Methods and apparatus for electroheating food employing concentric electrodes An electroheating apparatus to continuously treating pumpable food is made up of a number of connected electroheating cells. In one embodiment, all of the cells include a pair of concentric electrodes between which the food is pumped. The electrodes are c... | 05/26/1998 |
| 5440667 | OHMIC heater including electrodes arranged along a flow axis to reduce leakage current An ohmic heater comprises at least two electrodes contained within a vessel such that the electrodes lie along the length of the vessel. The vessel has inlet and outlet ports in the top and bottom through which a fluid to be heated flows, passing through ... | 08/08/1995 |
| 5222185 | Portable water heater utilizing combined fluid-in-circuit and induction heating effects A portable electric water heater has spaced concentrically disposed ferromagnetic electrodes defining an annular chamber for an electrically conductive liquid to be contained between the electrodes. The electrodes are encased in a housing having a liquid ... | 06/22/1993 |
| 5051562 | Temperature controlled fluid circulating system A temperature control system for use with a fluid circulating system operable in a heating or cooling state to monitor and control the temperature and flow of fluid circulated through a remote liquid circulation manifold comprising a display/control panel... | 09/24/1991 |
| 5033107 | Electric sauna heater This invention relates to an electric sauna heater comprising one or more heating resistors (1, 2) and means (3, 4) such as a time switch (3) for controlling the supply of electric power to the heating resistors, the time switch (3) comprising at least th... | 07/16/1991 |
| 4994641 | Beverage brewer with an electric flow-through heater operable in two power steps A beverage brewer has an electric flow-through heater operable in two power steps. In a first embodiment of the invention, the first and second pilot lamp (15 and 18, respectively) light up when the flow-through heater is operated at its upper and respect... | 02/19/1991 |
| 4953536 | Water heating apparatus Water heating apparatus by flow of electric current through the water from a set, for example, of eight electrodes whose surface areas for current flow are proportional to the value of two raised to the eight exponents zero to seven, that is 1 to 128. Thi... | 09/04/1990 |
| 4554440 | Automatic circuit control for electrical resistance cooking apparatus In an electric resistance cooker for quickly cooking food, such as ground meat, contactably interposed between electrodes, a food doneness control circuit is connected with the supply circuit. The control circuit senses the rate of change of the root mean... | 11/19/1985 |
| 4093847 | Temperature control system for electric fluid heater An electric fluid heater of the type in which the fluid is heated by passing electricity through it includes an electronic temperature control system responsive to a temperature sensor in the fluid for controlling the flow of electric current to the heati... | 06/06/1978 |
| 4052593 | Electric heating apparatus for heating thermoplastic articles A device for electrically heating thermoplastic articles includes a housing having means for receiving the article in position to be heated. An infrared generator in the form of a tungsten halogen lamp is located in the housing and a split, out-of-phase p... | 10/04/1977 |
| 4036716 | Method to prevent the formation of incrustations on working electrodes in electrode steam generators or the like and a means for performing the method The present invention relates to electrically heated steam generators and means for preventing and removing incrustations due to hard water in such generators. According to the invention this is achieved by means of a superimposed direct current the polar... | 07/19/1977 |
| 4029937 | Control system for electrically conductive liquid heating apparatus Electrically resistive liquids such as tap water are heated in an all solid state electrical apparatus. Spaced inner and outer conically shaped electrodes provide a flow path for the water or other liquid which is heated to a preselected temperature by se... | 06/14/1977 |
| 3983359 | Electrical fluid heater An electric fluid heater includes a metallic container defining a heating chamber provided with a pair electrodes for passing electric current through the fluid for heating the fluid. The container has a fluid input port, a fluid output port and a safety ... | 09/28/1976 |
| 3978313 | Power regulating arrangement for a three phase electrode-type water heater A water heater has a pair of concentric, relatively rotatable, electrically insulating supports between which the water to be heated can pass. Each support mounts three parts of equidistantly spaced electrodes. The spaced electrodes of the first set are e... | 08/31/1976 |
| 3943332 | Cooking device A device utilizing thermal and electrical energy for cooking food in a minimal time, particularly pieces of food in a flat configuration such as meat patties or hamburgers, steaks, and bacon.... | 03/09/1976 |
