Abstract: A group of domestic appliances mounted next to each other and substantially similarly oriented, each domestic appliance including a plurality of operator control elements, the group of domestic appliances comprising at least two domestic appliances and wherein the plurality of operator control elements is duplicated in the at least two of domestic appliances.
Abstract: The present invention provides a golf club head cover which provides conventional protection to golf clubs and in addition provides a heating function for a hitting surface of the golf club in order to keep the temperature within a optimized range for hitting. The golf club head cover has a main housing having an opening side for inserting a top portion of the golf club and a heating side for disposing a temperature controlling device for heating. The temperature controlling device has a power source, a circuit board, and a heating plate which couples with the hitting surface of the top portion of the golf club to apply heat to control the temperature.
Abstract: A desalinization system for converting a saltwater solution to a purified water composition is provided. The desalinization system (1000) has a primary tank (40) which contains a heated silicone composition within a heated silicone composition zone (210) and water globules (30) which pass through the heated silicone zone (14) to form an initially treated or initially heated water zone (60) within the primary tank (40). The initially heated water zone (60) then is fluidly displaced through a heating conduit (115) for passage into a secondary tank (120) in the form of steam (180). The steam (180) then condenses within a condensation zone (200) and forms a purified water zone (140) within secondary tank (120). The water within the purified water zone (140) of the secondary tank (120) may be removed through a water output line (150) from secondary tank (120).
Abstract: A protective wrap material enclosing a stack of cut sheets of paper is folded so that overlapping flaps of the wrap material cover opposite ends of the stack. The overlapping flaps are secured and sealed together only at selected areas that comprise a minor portion of the overlapped flaps, wherein the sealed areas have sufficient burst strength to avoid inadvertent opening of the wrap but at the same time are relatively easy to separate when it is desired to open the wrap to gain access to the cut sheets of paper. In a preferred embodiment the wrap material is heat sealable, and a modified heat plate for applying heat only to the selected areas has a grooved front surface defining heat focusing bars that concentrate heat sufficient to fuse the wrap material only in the selected areas.
Abstract: Apparatus and methods for detecting molecules in a fluidic environment are provided, including nanodevices and methods for fabricating, functionalizing, and operating such nanodevices. At least one of the methods includes selective heating of nanodevices in an array.
Type:
Application
Filed:
December 4, 2007
Publication date:
November 13, 2008
Inventors:
Rashid Bashir, Oguz Elibol, Pradeep Ramachandran Nair, Donald Bergstrom, Ashraf Alam, Bobby Reddy, JR.
Abstract: A heat trace system (10) is used for heating water to prevent freezing in a conduit (20) while servicing an aircraft positioned at a passenger loading bridge (52). An upstream fitting (26) is attached onto the conduit adjacent to a building structure and a downstream fitting (48) is attached onto the conduit adjacent to the cab of the passenger loading bridge. A coated retractable coiled wire disposed within the conduit and cold lead wires (46) enter through the upstream fitting and leave through the downstream fitting. A low voltage solid state power control box (56) is in communication with the cold lead attached to the coiled wire inside providing regulated electrical energy for heating the coiled wire thus preventing freezing the water within in the conduit.
Abstract: A heated handle construction for integration within an umbrella, cane, walker, crutches, wheelchair, snow shovel, baby stroller, golf club, hockey stick, animal lead/leash, knitting needle and crochet hook is provided having an integral stem portion constructed with a handle portion, a central shaft, and a bearing member. The handle has an outer show surface and is composed of a thermally insulating material, wound with wrapped flexible heating tape or strip, and connected through an on-off switch to a plurality of batteries present in a hollow cavity of the central shaft. Optionally, a thermally insulating foam tape is inserted between the heating element and the thermally insulating handle. An infrared reflector placed below the heating element directs heat to the user's hand. The heating element raises the temperature of the handle, radiating heat to the hand of the user, thereby providing a comfortable grip during use in wintry weather.
Abstract: A heated handle construction for integration into a cane, walker, walking stick, snow shovel, baby carriage or stroller has an integral stem portion constructed with a handle portion, a central shaft, and a bearing member. The handle is thermally insulating, wound with wrapped flexible heating tape or strip, and connected through an on-off switch to a plurality of batteries present in a hollow cavity of the central shaft. Optionally, a thermally insulating foam tape is inserted between the heating element and the thermally insulating handle. An infrared reflector placed below the heating element directs heat to the user's hand. The heating element raises the temperature of the cane, walking stick, walker, snow shovel, or baby carriage handle, radiating heat to the hand of the user, thereby providing a comfortable grip during use in wintry weather.
Abstract: A heated handle construction for integration and/or detachable mounting on an umbrella, cane, walker, crutches, wheelchair, snow shovel, baby stroller, golf club, hockey stick, animal lead/leash, knitting needle and crochet hook has an integral stem portion constructed with a handle portion, a central shaft, and a bearing member. The handle has an outer show surface and is composed of a thermally insulating material, wound with wrapped flexible heating tape or strip, and connected through an on-off switch to a plurality of batteries present in a hollow cavity of the central shaft. Optionally, a thermally insulating foam tape is inserted between the heating element and the thermally insulating handle. An infrared reflector placed below the heating element directs heat to the user's hand. The heating element raises the temperature of the handle, radiating heat to the hand of the user, thereby providing a comfortable grip during use in wintry weather.
Abstract: An electronic device for controlling plastics injection molds; the electronic device being completely separate and independent of the central temperature regulating control unit of the mold, and having a number of electronically controlled electric switching assemblies, each of which is interposable between one electric power module of the central temperature regulating control unit of the mold and the two independent resistors and two independent temperature sensors which together form each heating unit of the injection device of the mold; each electric switching assembly selectively and alternatively connecting one of the two resistors and one of the two temperature sensors of a corresponding heating unit to a respective electric power module of the central temperature regulating control unit of the mold; and the electronic device also having an electronic central control unit which controls the various electric switching assemblies as a function of the state of the resistors and temperature sensors of the
Abstract: A heating apparatus comprising a textile based heating element, a power source and related components. The heating apparatus can be designed, retrofitted or manufactured into articles of clothing or equipment such as gloves, vests, jackets, shirts, pants, socks, insoles, mitts, handwarmers, seats and other common articles. A textile based heating element comprises one or more conductive wires stitched into a fabric carrier. Various conductive wire configurations can desirably adjust the resistance of the textile based heating element thereof. Methods of manufacture and use are disclosed in conjunction with the heating apparatus.
Abstract: A towel and garment warmer comprising an elongated cabinet having sidewalls that define a warming chamber with an open upper end that is closed by a lid pivotally attached to a sidewall. The cabinet is configured to allow the articles to be warmed to hang in the warming chamber. Attached to the bottom surface of the lid is one or more hooks or other securing mechanisms configured to secure the articles in the warming chamber. A source of warm air is located at the lower end of the heating chamber to direct warm air upward so as to substantially evenly warm the articles. Air is discharged from the warming chamber through vents located in the lid. A cooling system has a source of cool air in communication with the warming chamber to allow the user to inject cool air so as to cool and freshen the articles therein.
Abstract: Rapid heating of a surface of an object is achieved by moving the surface of the object proximate to one or more flexible baffles. The one or more flexible baffles are in fluid communication with a pressurized and heated flow of air. The one or more baffles are arranged to contact the surface of the object in the absence of the flow of air. The flow of air creates a gap between the one or more flexible baffles and the adjacent portions of the surface. The flow of air traveling through the gap heats these portions of the surface with a high thermal transfer efficiency. Objects to be heated may include substantially two-dimensional planar objects such as thin plates, as well as three-dimensional objects such as cylinders.
Abstract: Induction heatable clothing items such as footwear (22) and apparel (160) are provided which include a clothing body having an induction heatable element (36, 108, 112, 114, 116) and preferably having heat retentive material containing phase change material, wherein the element (36, 108, 112, 114, 116) is operable to be heated when subjected to an alternating magnetic field. The clothing items (22, 160) are heated using induction heaters (26, 84). In preferred forms, wireless temperature sensing is used to control heating of the items (22, 160). To this end, the heating elements (36, 108, 112, 114, 116) may be provided with RFID tag/temperature sensor assemblies (58, 60, 110), and the induction heaters (26, 84) are equipped with correlated RFID reader/writer devices (80). Alternately, microwire temperature sensors (120) may be used with the induction heaters (26, 84) having microwire detectors. In other embodiments, temperature monitoring is achieved using impedance detection feedback control.
Abstract: Systems and methods for pulse electrothermal and heat-storage ice detachment. A pulse electrothermal ice detachment apparatus includes one or more coolant tubes, and optionally, fins in thermal contact with the coolant tubes. The tubes and/or fins form a resistive heater. Apparatus applies electrical power to the resistive heater, generating heat to detach ice from the tubes and/or the fins. A freezer unit forms a heat-storage icemaking system having a compressor and a condenser for dissipating waste heat, and coolant that circulates through the compressor, the condenser and a coolant tube. The coolant tube is in thermal contact with an evaporator plate. A tank, after the compressor and before the condenser, transfers heat from the coolant to a heating liquid. The heating liquid periodically flows through a heating tube in thermal contact with the evaporator plate, detaching ice from the evaporator plate.
Abstract: There is disclosed a heater for an automotive vehicle or other article of manufacture. The heater typically includes a first conductive medium and a second conductive medium disposed upon a carrier. In a preferred embodiment, the first conductive medium includes a first section and a second section that are electrically connected by a second conductive medium. The second conductive medium preferably exhibits a positive thermal coefficient.
Abstract: A pet pad that can be configured to fit in a variety of different vehicle cargo spaces. The pet pad has a main portion and a plurality of extending portions coupled to the main portion. The extending portions have a first position in which they are drawn into the main portion and a second position in which the extending portions increase a surface area of the pet pad. The pet pad can include a heating and/or cooling device.
Type:
Application
Filed:
January 18, 2007
Publication date:
July 24, 2008
Applicant:
Hyperion Innovations, Inc.
Inventors:
Amy Martin, Russell Borgmann, Paul Vincent, Michael Deilke, Alison Deilke, Richard Fine
Abstract: A heater assembly for a dryer is stably assembled and reduces noise. The heater assembly for a dryer includes hot wires electrically heated an insulator provided with a groove at the center, having lower and upper portions into which the hot wires are fixed, and a partition plate including an insertion hole into which the insulator is inserted and at least one clamp portion provided at the rim of the insertion hole and fixed into the groove.
Abstract: The present invention is a BLISK airfoil heat treating apparatus and method for heat treating the leading and/or trailing edge section(s) of a BLISK airfoil using the BLISK airfoil heat treating apparatus. The apparatus comprises a pair of hingedly connected heat treating shells, each shell having a cavity for receiving an airfoil edge section requiring heat treatment. A resistive heating element is positioned with the shells to heat the cavities.
Abstract: Described is a heatable utensil and system. A device comprises a utensil attachment and a handle. The utensil attachment includes a housing, a first connector and a heating element. The housing at least partially situates the heating element. The handle includes a handheld housing, a second connector and a power source. The handheld housing at least partially situates the power source. The utensil attachment and the handle are detachably coupled using the first and second connectors. When the first and second connectors are coupled together, the heating element draws power from the power source to increase a temperature of at least a portion of the housing of the utensil attachment.
Type:
Application
Filed:
September 19, 2006
Publication date:
April 10, 2008
Inventors:
Michele Degrace, Bruce Peter Popek, Damian Mucaro, Carrie Burns
Abstract: A method and apparatus for removing moisture from a lighting apparatus is disclosed. In one embodiment of the present invention, the apparatus for removing moisture from a lighting apparatus includes at least one light emitting diode (LED) for outputting visible light and at least one LED for outputting infrared light to remove moisture from the housing.
Abstract: An electric PCB heating component for a heating electric component is coupleable to an electronic circuit board. The PCB heating component includes a fastening element, a heating element for generating thermal energy, and a heating body. The heating body emits thermal energy via a heat radiating surface. For a low cost PCB heating component, the heating element is a PTC heating element. A plurality of heating projections of the heating element cooperate to form a relatively large heat radiating surface such that thermal energy can be emitted in a substantially directional mode. The heating projections can be convection or radiation elements.
Type:
Grant
Filed:
November 10, 2005
Date of Patent:
February 26, 2008
Assignee:
DBK David + Baader GmbH
Inventors:
Friedrich von der LĂ¼he, William Muirhead
Abstract: An installation for heating products, in particular, a food composition formed from a heterogeneous mixture of a liquid phase and solid particles, including at least one heating pipe of tubular cross-section, the heating installation being supplied by a feed pump opening directly into the heating tube and driven by a first motor. The heating tube includes a worm that consists of a non-conductive material and is driven by a second motor controlled to provide a flow rate in the heating chamber.
Type:
Application
Filed:
July 13, 2007
Publication date:
January 24, 2008
Applicant:
Campbell France S.A.S., a corporation of France
Abstract: The invention is a system that provides a means to using passing air to turn on an electronically powered device that is removably attached to an exterior portion of a vehicle as the vehicle travels betweens two locations. The invention is also embodied as a device that provides a means to turn on an incandescent light bulb that illuminates an ornament that is attached to an automobile window using passing air caused a moving automobile.
Abstract: A heater for a window of an optical gas sensor is provided. The heater may be positioned over a portion of the window or may form at least a portion of the window. Alternatively, the heater may be separate from the optical gas sensor and positionable over the window either in contact therewith or in close proximity thereto. In one embodiment, the heater is substantially transparent to the relevant wavelengths of electromagnetic radiation that are used in optical monitoring of respiratory gases, anesthetic agents, or the like. Alternatively, the heater may be configured so as to provide a substantially unobstructed optical pathway through the window. Optical gas sensors and complementary transducers that include the heater are also disclosed.
Abstract: One or more heating elements comprise a heating element. One or more elongated beams comprise an elongated beam. The heating element is coupled with the elongated beam and induces a time-varying thermal gradient in the elongated beam to cause one or more oscillations of one or more of the one or more elongated beams.
Abstract: A cryostat (1) having a sealable housing (2) is described, the housing (2) enclosing a coolable cryostat chamber (3). For cooling the cryostat chamber (3), a refrigeration device (4), a control system (5) and a power supply (6) are provided. For cutting frozen samples, a microtome is arranged in the cryostat chamber (3). A temperature-controllable heating plate (7) is integrated into the housing (2) of the cryostat (1), outside the cryostat chamber (3).
Abstract: In some instances, ice can form on the surface of a compressor airfoil. If the ice dislodges, it can impact and damage other compressor components. Aspects of the invention relate to systems for detecting the presence of ice or water on a compressor vane during engine operation. A ceramic insulating coating can be deposited on a portion of the surface of the vane. A heater and a thermocouple can be provided near the outermost surface of the coating such that the thermocouple can sense heat from the heater. The heater and the thermocouple can be provided within the coating. The presence of water film and/or ice on the coating surface can be detected by taking a thermocouple measurement following a heater pulse. The presence of a water film or ice results in a delay in the temperature rise detected by the thermocouple.
Abstract: This invention relates to RV stand offs or breaks and in particular, but not exclusively not to stand offs which are suitable for use in plasma generating apparatus. A stand off 14 includes a resistive or insulating cylinder 15, through which gas feeds are drilled and a close coupled helically wound combination, generally indicated at 16. This combination 16 comprises an RF conductive tube 17 in the form of a braided cable; a thermocouple 18 having twisted pair supply cables 19 and a heater element 20 in the form of a cable loop or pair.
Abstract: A construction box includes a power connector for connection to a power source and a heater constructed for generating heat within the construction box when connected to the power source. The construction box also functioning as a warmed seat.
Abstract: A heated motorcycle handgrip is securable to a motorcycle handlebar and includes a grip housing that has a first end adapted to receive the handlebar, and a second end opposite the first end. The grip housing includes a heating element that is operable to provide a heat output, and a heater control dial is coupled to the second end of the handgrip to control the heat output of the heating element.
Type:
Grant
Filed:
October 20, 2005
Date of Patent:
March 13, 2007
Assignee:
Harley-Davidson Motor Company Group, Inc.
Abstract: Sensor structure of a flow body protruding into a current for carrying out measurements of flow states, containing a structural part (1) with at least two measuring orifices (5), to which transfer lines (7) are coupled, which guide the flow medium from the measuring orifices (5) to a pressure converter system (13) for the purpose of determining the flow states. The outer shell (3) of the structural part (1) contains two areas (21, 22), which are arranged behind each other viewed in the direction of flow, wherein the first area (21) has greater thermal conductivity than the second area (22). Within the first area (21) heating elements (31) are arranged on the structural part (1), and are connected with a temperature control circuit with the temperature on the surface of the first area (21) as a control variable.
Type:
Grant
Filed:
May 4, 2002
Date of Patent:
March 6, 2007
Assignee:
EADS Deutschland GmbH
Inventors:
Herbert Zippold, Horst Odebrecht, Roland Lang, Ronald Gerbig, Heinz Meister, Manfred Palik, Hermann Wandel
Abstract: A heating mat employs electrical resistance foils to provide a uniform heat. In embodiments of the invention applicable for providing heat to individuals, the mat provides this uniform heat at a comfortable temperature. The heating mat structure comprises protective layers surrounding the heating element to provide a durable structure that is suitable for industrial and commercial use.
Abstract: A heated construction box includes a power connector for connection to a power source and a heater constructed for generating heat within the construction box when connected to the power source. The construction box may function as a warmed seat, heated office, heated workbench, for example, and may attach to a vehicle such as a bed of a pick-up truck. In one embodiment, the power source for the construction box may provide 12V and be removed for remote recharging.
Abstract: High-frequency AC voltage with a frequency in a range of from 60 to 100 kHz supplied from a power source at 3 to 15 kV is applied to an electrical conductor within about 30 cm of a cableway. The high-frequency AC voltage generates an alternating electric field. Capacitive AC current associated with the alternating electric field flows through the ice on the cableway and on the electrical conductor, causing dielectric loss heat that melts the ice.
Type:
Grant
Filed:
January 24, 2002
Date of Patent:
January 16, 2007
Assignee:
The Trustees of Dartmouth College
Inventors:
Victor F. Petrenko, Charles R. Sullivan
Abstract: Conducting-fiber deicing systems and methods. In one embodiment, an assembly includes a surface subject to an accumulation of ice, the surface at least partially including a heating portion having a layer of multi-directional electrically-conductive fibers formed between first and second non-electrically conductive layers. The layer of electrically-conductive fibers is coupled to a power supply member and is adapted to conduct an electrical current such that the layer of electrically-conductive fibers, and at least one of the first and second non-electrically conductive layers of the heating portion, are raised to an elevated temperature to at least partially inhibit the accumulation of ice on the surface.
Abstract: A device for remotely decoupling coupled objects with a fusible link underwater using a replaceable fusible link of appropriate electrical resistance, a method to supply a high-power charge of electricity across the fusible link, a mechanism held by the fusible link to hold and release a secondary link between the coupled objects and to add mechanical advantage to the strength of the fusible link, and a command-signal delivery system that enables remote activation of the device.
Type:
Grant
Filed:
February 6, 2004
Date of Patent:
November 21, 2006
Assignee:
Desert Star Designs, LLC
Inventors:
Marco Flagg, Andrew Eric Goldstein, Adam Paul Harvey, Gregg Michael Holtmeier
Abstract: A rechargeable, reusable heated hand grip for use on a ski pole, shovel or other cold weather hand-held tool or object is provided. The hand grip includes a bushing for receiving the end of a tubular object and retaining the object within a bore in the central core of the hand grip, which compresses around the bushing for tight engagement. A wire-wound heating element is wrapped around the exterior surface of the central core and an outer housing surrounds the heating element and the central core. The bore houses a pair of lithium-ion batteries connected in series, a switch with the switch control protruding from the top of the grip, and a printed circuit board connected to the switch.
Abstract: Certain exemplary embodiments comprise a system comprising: a heating element; and a control system adapted to control a heating of a shaft to a temperature within a predetermined temperature range for a predetermined time interval, the heating sufficient to reduce an electrical runout value of the shaft, the heating occurring while the shaft is rotating.
Abstract: A high voltage circuit breaker with a gas-insulated tank is provided. Enclosed with the tank is an elongated heater having at least one heating element enclosed in an outer tube. The heater is located coaxially within the tank and is surrounded by the insulating gas.
Type:
Grant
Filed:
October 6, 2005
Date of Patent:
September 5, 2006
Assignee:
Pennsylvania Breaker LLC
Inventors:
David S. Johnson, Jeffry R. Meyer, Daniel C. Schiffbauer
Abstract: One or more heating elements comprise a heating element. One or more elongated beams comprise an elongated beam. The heating element is coupled with the elongated beam and induces a time-varying thermal gradient in the elongated beam to cause one or more oscillations of one or more of the one or more elongated beams.
Abstract: An adjustable diving mask with a frame assembly has two-frames for mounting two lenses, and an angle adjusting mechanism mounted between the two frames for adjusting the included angle between the two frames, and accordingly, the included angle between the two lenses. The angle 10 adjusting mechanism includes a tight fit shaft having a tapered section and a non-circular section, about which the first and the second frame could be pivotally turned relative to each other to obtain a desired included angle between them.
Abstract: A heater mat for using the Joule effect to heat an aerodynamic surface. The heater mat is provided with a resistor element including at least two substantially parallel segments of electrically-conductive fibers disposed on the aerodynamic surface. The segments come from a single strip of electrically-conductive fibers, with two adjacent segments being obtained by folding a portion of the single strip at least twice.
Abstract: A heating element autobalance device includes a fixing mount, a balance device, a heating element, a top cover, a bottom cover and a base, wherein the fixing mount is disposed in the top cover, The balance device is configured atop the fixing mount, and is structured to include large rockers and small rockers, wherein the small rockers are separately configured on another side of each of the large rockers for disposing the heating element thereon, thereby achieving effectiveness and suitability for placing any body to be heated atop the heating element. The heating element penetrates the fixing mount and is fixedly configured atop insulation boards. Upon a body to be heated presses downwards and thereby comes in contact with the heating element, the balance device is thereby actuated, which effectuates clinging of the heating element to the body to be heated, and thus achieves effectiveness of even heating.
Abstract: The invention relates to a heater for an electric central buffer coupling in which at least one heating element (3) is placed in a recess of the coupling head (1) and is covered toward the outside. To improve the transfer of heat from the heating element (3) into the coupling head (1) and to reduce the expense of assembling and dismantling the heating element (3), the recess is precision fitted to the diameter of the heating element (3) and the recess is constructed in such a way that after completion of the recess the heating element (3), including its seal to the front side, can be introduced into the recess and is to be removably affixed to the coupling head (1).
Abstract: A household electric appliance including a heating part and titanium oxide particles to be activated by heating, the heating part being a heating device inherently possessed by the household electric appliance and/or an additional heating device not inherently possessed by the household electric appliance.
Type:
Grant
Filed:
November 4, 2004
Date of Patent:
May 2, 2006
Assignees:
Osada Giken Co., Ltd., Hideharu Osada
Inventors:
Hideharu Osada, Hironobu Shibamoto, Shoma Osada
Abstract: A method modifies friction between an object and ice or snow. The method utilizes a heating element to apply a pulse of thermal energy to an interface between the object and the ice or snow; the first pulse is sufficient to melt an interfacial layer of ice at the interface. Water forming the interfacial layer refreezes to form a bond between the object and the ice or snow. The steps of the method may be repeated to form a second bond between the object and the ice or snow.
Abstract: An electric blanket includes a substrate made of cotton cloth, a heating member mounted on the substrate, a plurality of digital temperature sensors mounted to the heating member at a plurality of positions for detecting temperature of the heating member at the positions and sending signals relating to the temperature of the heating member at the positions and indicating the positions, a temperature protection switch, an electromagnetic radiation interference filter electrically connected to an AC power source, a DC power supply circuit, a display for displaying at least temperature of the electric blanket, a zero-cross detector, a triac electrically connected to the heating member, and a central processing unit. The central processing unit receives and processes the signals from the digital temperature sensors and a feedback signal from the temperature protection switch to control temperature of the electric blanket.
Abstract: A heating device into which a compule of dental material can be inserted to elevate the temperature of the dental material to above ambient temperature prior to clinical use having a base for housing a heating element, a temperature control mechanism for controlling the temperature of the heating element, a power connection for electrically connecting the temperature control mechanism to a source of power and a heating receptacle removably mounted on the base. The heating receptacle comprises a heating tray composed of a conductive material and an upstanding section extending from the heating tray and having a heating chamber open to the atmosphere which is adapted to receive one end of a conventional dispenser in which the compule of dental material is stored for raising the temperature of said dental material in said compule to an elevated temperature.
Abstract: A heat generator includes a heat generating member including a heat flow output face, a heat flow insulative member attachably surrounding the heat generating member except the heat flow output face for insulating the heat generating member except the heat flow output face, a heat flow compensating member attachably surrounding the heat flow insulative member but exposing the heat flow output face to allow it contacting with a specimen, and a heat flow compensating circuit connected between the heat flow insulative member and the heat flow compensating member. The circuit is capable of controlling heat generated by the heat flow compensating member to cause no heat flow flowing between the heat flow compensating member and the heat flow insulative member whereby the heat energy of the heat flow outputing from the heat flow output face of the heat generating member is equal to the heat energy of heat generated by the heat generating member.