Abstract: A hair styler for winding hair thereon for curling, comprising a hollow sealed tubular member made of a metallic material having good thermal conductivity and defining a heat pipe having a heat dissipating hair winding portion. The tubular member contains a charge of a working fluid vaporizable at an operating temperature of 50.degree. C. to 70.degree. C. The outer surface of the heat dissipating portion of the heat pipe is covered with an elastic hair engagement member for preventing hair slippage. The heat receiving end portion of the heat pipe is exposed so as to be adapted to receive heat from a separate external heat source having a temperature range of 50.degree. C. to 120.degree. C. Thereby hair wound around the outer surface of the heat dissipating portion of the heat pipe forming the bobbin is heated by the condensation of the vaporized working fluid within the heat pipe.

Abstract: A heating device adapted to be disposed in an opening in the side wall of a compressor that is used with an air conditioner or refrigerator so that fluids in the casing of the compressor can be vaporized. The heating device includes a PTC thermistor disposed in a housing and a generally cylindrical receptacle disposed about the housing. The housing includes at least one outwardly extending, resilient, heat dissipating, arcuate fin overlying the outer surface of the housing in spaced relaton thereto. The fin is biased outwardly to engage the inner walls of a receptacle. The receptacle is welded into the opening in the sidewall of the casing of the compressor. The fins form a snug fit with the housing and provide a good heat transfer contact with the receptacle. Lead-in wires extend from the PTC thermistor to the outside of the housing so that the PTC thermistor can be connected to a power supply.

Abstract: A latent heat storage apparatus for obtaining a sure latent heat from a latent heat storage material includes a plurality of small chambers for encasing at least the latent heat storage material. A capillary member is provided between the plurality of small chambers so that the contents of the plurality of chambers are coupled to each other. With this arrangement, the crystallization of the latent heat storage material in at least one small chamber is spread out into the other small chambers. In the case that the present invention is applied for a supercooling-prevention type heat storage apparatus, a supercooling-prevention material is encased in one of the small chambers. On the other hand, in the case that the present invention is applied for a supercooling type heat storage apparatus, one end portion of the capillary member is put out so that the latent heat storage material in the small chambers is crystallized by stimulation of the end portion thereof.

Abstract: A PTC heater for heating a tubular member includes an elongated profiled carrier body of heat conductive material having a first side provided with a flat support surface having a groove substantially perpendicular thereto extending along opposite longitudinal edges thereof and a second side provided with a channel of semi-circular cross-section for engaging the tubular member. A PTC heater element comprising a plurality of PTC resistance elements disposed between a pair of plate electrodes is positioned on the flat support surface in heat transmitting contact therewith and is covered by an elongate heat conductive cover member in flat surface engagement with the other side of the PTC heater element and provided with longitudinal rim portions closely fitted into the grooves. A U-shaped straddle clamping bracket having legs snap-fittingly anchored to the carrier body presses the cover toward the PTC heater element and carrier body.

Abstract: A heater unit for heating flexible hair roller curlers includes two spaced pairs of side-by-side, elongated juxtaposed heat transmitting plates. The two plates of each pair are connected to each other in heat transmitting relationship to form a closed heat transmitting path and are so shaped and configured to form a plurality of individual hair curler receiving pockets therebetween. An electric heating element is positioned in the space between the two pairs of plates in heat conductive contact with the confronting plates thereof. The width of the plates is less than the length of the curlers so that the opposite ends thereof extend beyond the edges of the plates and are thus not heated thereby.

Abstract: A heater adapted to be disposed in a vessel whereby to heat liquids contained therein. The heater includes a sealed heat-transmitting cannister that is adapted to be immersed in a vessel containing a liquid media. A foraminous PTC thermistor is disposed in the cannister and electrically insulated therefrom. The thermistor is supported in the cannister by a pair of braces resting upon the inside wall surface of the cannister and each brace includes a pair of facing channels engaging the edges of the thermistor. Electrical connections are provided to convey current to opposite sides of said PTC thermistor. A quantity of electrically inert vaporizable fluid of a predetermined boiling point partially fills the cannister to a level covering the thermistor whereby when current is passed to opposite sides of said PTC thermistor, the fluid will boil and then condense upon the walls of the cannister and give up its latent heat of vaporization and radiate heat into said vessel.

Abstract: A reaction system and process for uniformly heating semiconductor substrates and a device for supporting the same and direct conductive heating of IC wafers within a reactor are described. The substrate is held in direct contact with the heating source positioned within the reactor. The heat source is a thermal delivery module made of material such as solid silicon carbide, or high temperature material containing resistive heating elements. The heat is uniformly transferred to the walls of the module by a molten metal having a low melting point and high boiling point such as essentially indium or bismuth or a eutectic of indium and bismuth.

Abstract: An electric heat storage apparatus, such as a steam iron, hot plate, pan, etc., includes a metal body defining a hollow housing enclosing a heat storage device containing a thermally decomposable heat storage substance comprising 30-99% by weight pentaerythritol. The heat storage substance is completely confined in a fluororesin enclosure which isolates the substance from the metal body and prevents contact of ambient air therewith so that the thermal stability of the pentaerythritol is enchanced. The metal body is heated by an electric heating element to a selected temperature for storing heat in the heat storage substance. In the case of use as a cordless electric steam iron, the metal body forms the sole plate of the iron and is provided with a vaporization chamber in heat exchange relationship with the heat storage substance for the generation of steam.

Abstract: A fixedly positioned hot plate, particularly for use with a coffee maker, has an upper surface for receiving a container of liquid to be maintained at a constant temperature. An electric heating device arranged underneath the hot plate includes a plate member movable between a first position in biased engagement with the underside of the hot plate and a second position spaced therefrom to vary the heat exchange rate therebetween. Secured to the underside of the plate member is a metallic sheathed heating having a water heating pipe soldered to the periphery thereof. A temperature sensitive element, e.g. U-shaped bimetal, thermally coupled to the heating device has a first portion connected to a downwardly dependent stud secured to the underside of the hot plate and extending freely through a bore in the plate member an a second portion secured to the plate member.

Abstract: An air cooler having coolant tubes, a drain, a pair of coolant tube supports and a defroster for preventing condensate in the drain from freezing. The coolant tube supports include a vertical plate provided with a pair of horizontally spaced notches for supporting the defroster. The notches open to the lower edge of the plate and converge towards one another.

Abstract: A flatiron is provided with a plane plate (2) onto which a heating coil (5), a tubular coil (8) as evaporator means, and a capillary tube-sensing element (15) in a tube (14) are soldered. The bottom of the tubular coil (8) is provided with bores (12) in alignment with orifices (12) in the plane plate (2), which serve as outlet orifice for the evaporated fluid. The heating coil (5) and the tubular coil (8) are arranged in mutual heat-conducting contact. The plane plate (2) is connected to a casing element (3) and a handle (4) in a way that there will not arise any thermal bridges between the plane plate (2) and the casing or the handle, respectively. A thermostat for regulation of the temperature of the plane plate (2) is provided with a capillary tube-sensing element (15) leading to a regulating switch means arranged in the handle.

Abstract: A multiuse fan includes a housing enclosing an electrically driven fan for providing a flow to air from a grilled air inlet to a grilled air outlet through a generally circular electric heater assembly in the housing. The heater assembly includes a grating formed by a plurality of spaced, parallel, radially extending metallic heating plates, each having inner and outer portions inclined with respect to each other and which form an intermediate ring-like summit portion at the juncture of the inner and outer portions. The inner end of each plate is connected to an inner ring member coaxial with the fan and the outer end of each plate is joined to an outer ring attached to the housing. An electric heating ring member is positioned in an annular groove provided in the summit portion. Controls permit the fan to be engaged alone to merely circulate air or the fan heating ring to be simultaneously energized to heat and circulate the air.

Abstract: A PTC heating device which is widely applicable as a heating source to a variety of electronic apparatuses such as an electronic mosquito destroyer an electronic jar and the like. The PTC heating device includes a porcelain casing in which an electrode structure comprising a PTC thermistor having electrodes arranged on both surfaces thereof and two electrode plates interposing the thermistor therebetween is received in a manner such that terminals of the electrode plates is downwardly led out through the porcelain casing. The PTC heating device also includes a heat radiating plate arranged through an insulating plate on the electrode structure and provided at flanges thereof with a plurality of holding pawls which are located at positions apart from the terminals of the electrode plates on a bottom surface of the porcelain casing to securely hold the heat radiating plate and the porcelain casing together and ensure an adequate insulating distance between the holding pawls and the terminals.

Abstract: This invention concerns a heating pipe for panel heaters disclosed on walls, ceilings or floors to heat a room. The pipe is essentially constructed of a pipe itself, an electric heating wire running through it and aluminum granules stuffed between the two. Because of the simple structure, the production, the installment and the maintenance costs are cheap; as a matter of course, there is no additional need of a circulation pump for heating media and safety devices to watch the leak of heating media or the break of the pipe. Moreover, because spherical aluminum granules are closely packed, the heat conductivity is very good, which minimizes the heat loss and reduces the time to heat up a room. Also, the heat capacity is so small that frequency room temperature control by means of an automatic on-and-off mechanism has becomes possible.

Abstract: A fuel preheating system for an internal combustion engine wherein a preheater includes a body member having defined therein a pair of serially connected, generally parallel bores defining a flow passages through which a flow of fuel may be passed for heating thereof by elongated electric heaters extending within the passages and including a heating element encompassed by helical coils of a heat exchange structure. At least some of the coils of the heat exchange structure define plural tortuous flow paths extending generally axially of the heater.

Abstract: An electric steam iron housing has a sole plate with a generally flat upper surface having affixed thereto a one-piece heating assembly having a front portion and a rear portion. The front portion contains a serpentine steam generating passage with an inlet communicating with a water supply container on the housing and steam outlet leading to steam vent openings extending through the sole plate. The rear portion includes top and sidewalls defining a downwardly open chamber in which is disposed a multilayer PTC electric heating element assembly in surface-to-surface contact with the upper surface of the sole plate for heating the sole plate and the steam generating passage. An adjustable thermostat responsive to the temperature of the sole plate is connected in series with the heating element. The handle of the iron is detachable and designed to serve as a storage case for the iron and the iron can be placed in the case only when the thermostat adjustment knob is in the "Off" position.

Abstract: A PTC heater assembly comprises at least one PTC heater surrounded by an envelope of high thermal conductivity, thus greatly increasing the power output of the heater under operating conditions. In a preferred assembly a strip heater, comprising (i) an elongate strip of a conductive polymer PTC composition, (ii) electrodes embedded in said strip, and (iii) an insulating jacket, is sandwiched between a pair of metal, e.g. aluminum, sheets.

Abstract: The present invention relates to a heat storage element having a latent heat storage material sealed in the container under a reduced pressure. This heat storage element permits effective reduction of air in the heat storage element, and therefore, heat is smoothly transferred from outside to the latent heat storage material through the wall of the container. Accordingly, a heat storage element which has a very high heat storage characteristic is realized. Furthermore, this heat storage element, having almost no air sealed in, has a large heat storage density. When this heat storage element is used in combination with an electric heater element, heat will be uniformly transferred from the electric heater element to the latent heat storage material, involving a very small risk of part of the electric heater element being overheated.

Abstract: An electrically heated spray nozzle, such as for spraying plastics, includes a highly compressed tubular heating body wound about a spray nozzle as a plurality of coil windings. The heating body has a tubular steel inner jacket containing a pair of spaced electric heating elements embedded in a high compressed powdered insulating material. A copper outer jacket encases the inner jacket and a hard solder connection joint as least as broad as the diameter of the outer jacket connects the outer jacket and hence the heating body to the nozzle. The number of coil windings per unit length of nozzle body is larger near the ends of the nozzle than near its middle. A steel wear-resistant lining may cover the surface of the nozzle bore.

Abstract: A liquid heating system, for example a central heating system, including a heat store in the form of a stack of bricks heated to a relatively high temperature by electric heating elements embedded in the bricks and energized by off-peak electricity is thermally connected to a vessel containing the liquid to be heated by a controllable heat pipe. The heat pipe includes an evaporator zone in thermal contact with the heat store and a condenser zone in thermal contact with the vessel, which could be a water tank. The zones are joined by at least one duct to form a hermetically sealed unit containing a small quantity of a volatile liquid which, in use, is a totally evaporated in the evaporator zone so that the rate of heat transfer to the condenser zone from the evaporator zone is determined by the return flow rate of condensed volatile liquid to the evaporator zone.

Abstract: An electrical heating device for a mirror includes a pair of electrically conductive heating lining plates providing for heat distribution on a mirror, and electrical conductors connected to the plates for connecting the plates to a source of power. An insulating layer is disposed between the plates, the insulating layer having openings, and PTC resistor platelettes disposed in the openings and in electrical contact with the pair of plates. One of the plates has a larger area than the insulating layer such that an outer peripheral edge portion of the one plate is spaced outwardly of the outer peripheral edge of the insulating layer, the other of the pair of plates not being larger in area than the insulating layer. The larger of the plates is adapted to be adhered to the backside of a mirror glass for defogging and demisting the mirror.

Abstract: A device for transferring heat from a heating source to contents of an article to be warmed in which the device includes an outer wall adapted to be heated by a heating source, the heat source having a temperature above 212.degree. F., an inner wall secured to the outer wall, a sealed cavity defined between the inner wall and the outer wall, and a heat-transfer liquid located in the sealed cavity for transferring heat from the heating source at a temperature above 212.degree. F. through the inner wall to the contents of the article to heat the contents of the article to a temperature below 212.degree. F.

Abstract: A self-regulating electric heater includes a plurality of ceramic PTC resistors having flat contact surfaces on their opposite sides disposed between a pair of flat electrode plates with the contact surfaces in electrical and thermal contact with the plates. A support frame of electrically insulative material is formed with receiving portions respectively for the PTC resistors and the electrode plates to positions and hold the resistors and plates in assembled relationship for insertion as a single assembly into a closed-end cavity in a metallic radiator with the electrode plates in good heat transfer contact with the inner wall surface of the cavity. The frame is provided with spring seats receiving springs which coact with the radiator to bias the support frame into the cavity to insure stable intimate thermal contact between the electrode plates and inner cavity wall. The PTC resistors may be provided with chamfered edges along the peripheries of the flat contact surfaces thereof.

Abstract: Improved cookware is disclosed having non-ferrous metal sidewalls and a natural stone bottom central portion. The non-ferrous metal sidewalls preferably are formed of an aluminum alloy having a coefficient of thermal expansion substantially equal to the coefficient of thermal expansion of the natural stone bottom. The natural stone bottom preferably comprises an ironrich amphibole rock, and in the particularly preferred embodiment comprises hornblende.

Abstract: A food frying apparatus includes a housing having a front side, a vessel mounted within the housing to contain oil, the vessel having an expansion zone adjacent the front side, and an oil heating container connected to the vessel, the container being positioned adjacent the front side and in communication with the expansion zone. An electrical heater is mounted on the exterior of the container to indirectly heat oil therein. The oil is forcibly circulated between the vessel and the container by means of a motor mounted beneath the container and a rotor coaxially mounted within the container and coupled to the motor. A plug is axially insertable into the top of the container, and an upper end of the rotor is connected to the plug for axial movement therewith. The rotor has a lower end connected to the motor to enable relative telescopic sliding movement therebetween to achieve coupling or uncoupling.

Abstract: A hairsetter for electrically heating a plurality of flexible hair curlers includes a thermally insulated hollow container receiving therein a plurality of vertically disposed elongated flexible hair curlers arranged in a pair of rows. The curlers are heated by a heat sink core portion disposed between the curler rows and in heat conductive contact with the curlers. The heat sink core portion includes a flat electrical resistance heater plate sandwiched between two electrically insulating boards covered by two oppositely facing metallic heat sink members. The heat sink members each have a plurality of vertical channels receiving and contacting a respective one of curlers of a curler row for conducting heat to the curler from the heater plate. The rows of curlers are disposed in a tiered arrangement to facilitate removal of the heated curlers from the container through a top opening on the container closed by a hinged cover.

Abstract: The heating element has a heat conductor in the form of a metal tube. The molten plastic is conveyed to the tube through an inflow aperture. The end of the tube that is remote from the inflow aperture is shaped into a point and has flowthrough apertures. The tube is welded in the vicinity of the point to an outer jacket made out of a material with a low specific electric resistance. Outside the welding point, there is a layer of insulation between the tube and the outer jacket. The layer is between 0.1 and 0.5 mm thick and can be made out of ceramic. The electric energy supplied to the tube is so low that the molten plastic is not subjected to thermal overload in the vicinity of the point.

Abstract: An electric thermal unit is disclosed for controllably heating cylinders in plastic material extruders, rubber drawing machines, and the like apparata. The electric thermal unit is designed to provide closed circuit ventilation air circulation such as to enable the heated outlet air to be used for other applications, whether related or not to the proper operation of the cited apparata.

Abstract: A low power electrical heating device for use in inhibiting the condensation of moisture in the housing of a piece of electrical equipment has an electrical resistor adapted to be connected to the main current circuit encased in an outer cover of thermally conductive material, the cover having a flat surface at one portion of its exterior periphery. A finned heat radiating body of thermally conductive material defines another flat surface and supports the resistor. The heat radiating body has its flat surface in flush engagement with the flat surface of the resistor for direct heat transfer from said resistor to said heat radiating body.

Abstract: An electric heater comprising a metal casting having an electric heating element of sinuate shape cast therein. The casting has a plurality of ventilation openings therethrough located between the sinuations of the heating element for permitting air to flow directly to the surface on which the heater is mounted for ventilating and cooling it.

Abstract: In the heat treating apparatus disclosed herein, semiconductor wafers are baked on the circular hot plate while being sheathed with a uniform vapor flow. The preferred vapor is a mixture of a relatively large volume of nitrogen carrying a relatively small volume of HMDS. After passing over the wafer, the vapor sheath is drawn, through an annular gap, into an exhaust chamber which surrounds and underlies the hot plate thereby avoiding heat and vapor loss into the other portions of the semiconductor fabrication line within which the baking apparatus is typically incorporated.

Abstract: Heating apparatus includes a tray having a layer of insulative material disposed therewithin, above which a number of infra-red lamps are supported. The ends of each lamp are provided with a pinch seal having an amp tag connector, which is connected to the respective end of a filament within the lamp, sealed therein. Each pinch seal is enclosed within a ceramic housing and the heating apparatus is mounted beneath a layer of glass ceramic. A heat-conductive stud is intimately disposed between the layer and the pinch seal, via an aperture in the housing, so as to provide a good heat-conductive path from the pinch seal to the relatively cool glass ceramic.

Abstract: The present invention relates to heat engineering. The essence of the present invention consists in that a condensation chamber is installed essentially horizontally along the object being heated; the device comprises at least two branch pipes: vapour-flow and fluid-flow, which are used for communicating the space of the condensation chamber and the space of the tube with the space of the evaporation chamber.

Abstract: Heating apparatus includes a tray having a layer of insulative material disposed in the base thereof and a number of infra-red lamps disposed thereabove. The apparatus is accommodated within a housing having a layer of glass ceramic to form a hotplate. Each end of each lamp is provided with a pinch seal enclosed within a ceramic end cap. To improve substantially dissipation of heat from the pinch seals, first apertures are provided in a hollow bar and second apertures are provided in a base plate below the pinch seals, so as to permit air to flow into the housing via the second apertures, substantially around the pinch seals, and out of the housing via the first apertures.

Abstract: The invention concerns variable contour rollers for use in calendering or pressing devices, printing presses and like applications. The rollers include an external element of cylindrical form, for example of cast iron, and in their interior a number of transverse elements which can be made to expand radially by heating. More or less substantial radial expansion provokes directly or indirectly a change in the profile of the exterior generally cylindrical working surface. The interior of the roller may be a shaft carrying heating elements and which is fixed or rotates with the external working surface.

Abstract: This disclosure relates to a portable instrument for inducing heat into an object. The instrument includes an enclosure that fastens to and at least partially encloses the object, an electrical power source fastened to the enclosure and including a variable power supply for passing heating current through the enclosure and thereby heating the object, and a thermocouple for sensing the temperature of the object.

Abstract: An electric fluid heating apparatus includes a closed hollow metallic vessel filled with substantially pure gaseous helium at a pressure from about 30 psl absolute to about 100 psl absolute. At least one electric resistance heating element is disposed in the vessel and surrounded by the pressurized helium which acts as a heat transfer medium to conduct heat from the resistance element to the vessel walls by conduction and convection. The vessel is positioned within a closed container having walls spaced from the vessel to define a fluid flow path for the fluid to be heated. A baffle between the container and vessel divides the flow path into an inlet chamber in which the fluid entering the flow path is preheated and an outlet chamber in which the fluid is heated by contact with the vessel walls prior to discharge from the container through a metal outlet conduit passing through the vessel in contact with the helium for transfer of additional heat to the fluid.

Abstract: There is disclosed storage apparatus for storage of energy in the form of heat or cold, preferably over a prolonged storage period. The apparatus comprises a container enclosing an energy storage zone and an insulating zone around the storage zone. The storage zone is filled with a mass of heatable or coolable storage material forming a storage core, and the insulating zone with a porous mass of granular or fibrous material forming a thermal insulating layer. Energy can be supplied to the storage core by, for example, a solar-powered electrical resistance heater and extracted from the core at a desired time by, for example, a heat exchanger. The insulating effect of the insulating layer is enhanced, particularly from the viewpoint of long-term energy storage, by creation of a vacuum in the cellular structure of the insulating layer.

Abstract: This invention relates to hot tip bushing means for a synthetic resin injection molding machine, which can reduce the pressure loss at the injection molding time and determine the position of a heating tip easily and accurately. To attain this purpose, a straight resin flow passage is formed axially in a cylindrical body of the hot tip bushing means and the fused resin passing through the straight resin flow passage is heated by an outer heater. Further, a cylindrical body of the hot tip bushing means which is near the heating tip is fit to a mold sprue, thereby the position of the heating tip is determined easily and accurately.

Abstract: A cylindrical core of a ceramic such as alumina (Al.sub.2 O.sub.3) has grooves in the form of a double lead thread. A coil of Nichrome V is placed in the grooves, starting in one lead of the thread and returning in the other. A split ring of a ceramic such as beryllia surrounds the core. The heater is enclosed in a housing of a metal such as Inconel 600. The entire cartridge is only one inch long and 3/16 inch diameter. It is used as a catalyst bed heater for a satellite thruster.

Abstract: An electric hotplate has a hotplate body with a closed cooking surface made from an iron-based sintered material with additions of other metals.The sintered material hotplate body has a plurality of narrow, flat slots on its bottom, in which is inserted an uncoiled, slightly undulating heating resistor wire. According to a variant, said heating resistor comprises a strip.

Abstract: An electrically-heated dry bath wherein a metal block having receptacles for receiving test tubes or the like has resistor heaters fixed thereto and a thermistor temperature sensor therein. A control circuit is provided which connects and disconnects electrical current to and from said heaters in response to the temperature sensor. The control current is fedback such as to eliminate a factor J(S) from the overall transfer function of the circuit, J(S) being a transfer function expressing how various thermal time constants in the bath would, unless neutralized, make the effective time constant of the controlled system deviate from the ideal on-off transfer function.

Abstract: Rotatable heating apparatus including a support portion, a shell portion, a heating portion, a power supply portion and a control portion; the support portion including a frame section, the frame section including spaced upstanding sections, the upstanding sections including shaft supports; the shell portion including a substantially cylindrical outer section, a smaller substantially cylindrical inner section disposed within the outer section adjacent thereto and spaced therefrom, substantially parallel first and second end sections adjacent the ends of the cylindrical inner section, first and second annular sections enclosing the spacing between the ends of the inner and outer cylindrical sections, a shaft member disposed along the axis of the shell portion; the heating portion including a plurality of spaced electrical heating elements disposed between the inner and outer cylindrical sections, the heating elements extending from the first annular section to a point adjacent the second annular section, insul

Abstract: An apparatus for liquifying a rod of binding by application of heat includes a die-cast aluminum heating member having an elongated conical first channel decreasing in diameter from an inlet adapted to receive a rod of liquifiable bonding material through an elastic funnel surrounding the inlet to an outlet for discharging liquified material through a one-way valve. An electric heater is disposed in a second channel in said member parallel to the first channel and includes an elongated electrically insulating and elastic housing defining a cylindrical cartridge receiving at least one flat PTC resistor disposed between at least a pair of pressure bodies in the housing on opposite sides of the least one PTC resistor. At least one elongated, curved leaf spring is disposed between one of the pressure bodies and at least one PTC resistor for applying pressure to the bodies and the at least one PTC resistor to maintain constant contact pressure therebetween even under thermal expansion and contraction.

Abstract: A contact lens disinfector has a pair of wells that are axially aligned and open in opposite directions from the disinfector casing. Between the wells is a positive temperature coefficient thermistor which serves as a heater to supply heat through a pair of heat sinks on opposite sides of the heater. Each heat sink has a spherically curved surface which engages flush with a companion shaped wall of the lens well to enhance the transfer of heat from the heater to the solution within the lens well.

Abstract: An evaporative cooling unit for a refrigeration system includes a plurality of spaced, parallel metal heat exchanging fins provided with a plurality of openings receiving successive turns of a coiled tube adapted to carry refrigerant through the unit. The fins are further provided with snap-action cutouts extending from the periphery of the fins inwardly to a location between adjacent rows of the coil turns and a rod-like electric resistance heating element for periodicaly defrosting the unit is held in the cutouts. Each cutout includes an entry slot inwardly tapered to a throat defined by deformable edges spaced apart a distance marginally less than the diameter of the heating element to present resistance to the passage of the heating element through the throat and a notch communicating with the throat and within which the heating element is held.

Abstract: Heat to disinfect contact lens is supplied uniformly to a well in which the lenses are placed, from a single small heat source by providing an area of high resistance to heat flow directly above the heat source.

Abstract: Electrical heating unit for tipping-off vacuum electron tubes comprises a cylindrical resistance heating coil, a cylindrical heat-shielding means within and spaced from the heating coil and a support plate adjacent one end of the coil permitting leads of a vacuum tube to be positioned within the heat-shielding means. The heat-shielding means comprises a unitary member having a hollow cylindrical body, an outwardly-extending flange at one end of the body, and an inwardly-extending flange at the other end of said body adapted to support the leads of said vacuum tube with the tubulation of the tube extending therethrough. The body has a height that is less than the height of the longest lead of the vacuum tube.

Abstract: An improved heating fixture, wherein the support means upon which a workpiece to be heated is mounted, is a vitreous carbon plate. The use of a vitreous carbon support plate significantly reduces the time required to heat and cool the support plate and a workpiece thereon.

Abstract: This invention relates to an improved connector assembly for an electrically heated injection molding sprue bushing and a method of making the same. The sprue bushing has a helical portion of the heating element extending around a central core portion which conveys pressurized melt from a molding machine to a cavity in the mold. It is formed by filling the space between the stainless steel core portion and a stainless steel outer sleeve by a highly conductive copper alloy. The heating element has a lead portion which extends out through an aperture. The aperture provides a seat which receives two split washers with central openings therethrough for the lead portion. The washers are each formed of two half washers which are oriented so that the divisions therebetween are not aligned. A connector sleeve is inserted over the projecting lead portion with a flared end which is received in the aperture against the washers. The washers and connector sleeve are brazed in position in a vacuum furnace.