Abstract: An eyeglass heater includes a fan motor, heater coils, and feedback circuitry for controlling the fan motor and heater coils. A heat conductive housing encloses all components and provides opposed air outlets for directing the heated air upon the work piece (eyeglass frames).

Abstract: An apparatus for the enhanced drying of shoes and boots is provided, having a main housing cylinder having a first end cap secured to a main housing, with a fan motor and screen directing forced air into a heated grid of the main housing cylinder, with the main housing cylinder including directing conduits, with the directing conduits arranged for receiving L-shaped tubes for insertion within boots, and wherein the organization is arranged for disassembly for securing the L-shaped conduits within the main housing during transport and storage of the organization.

Abstract: The invention relates to a gas chromatography transfer line, having a glass tube (12), a steel tube (13) enclosing this glass tube and a heating coil (17) enclosing the steel tube, in which a tube (15) made of a material with high thermal conductivity is arranged between the steel tube (13) and the heating coil (17), the tube (15) being provided with a series of bores (16) in the axial and in the circumferential direction and being soldered to the heating coil (17) and to the steel tube (13), the solder (20) filling the bores (16) and intermediate spaces between the steel tube (13) and the tube (15).

Abstract: A complete in situ PCR system for amplification of nucleic acids contained in a prepared cell or tissue sample. The containment system for the PCR sample comprises a glass microscope slide, a specimen sample containing the target nucleic acid sequence mounted on the slide, a flexible plastic cover over the sample, and a retaining assembly fastened to the slide and to the cover to retain and seal a reaction mixture against the sample during thermal cycling.The retaining assembly includes a rigid ring on a rim portion of the cover, a cross beam having spaced parallel rails joined by opposite flat ends, and a pair of clips which are pressed over the ends and opposite sides of the slide to fasten the cross beam and cover to the slide.

Abstract: A heat gun quickly and efficiently dries joint compound. The heat gun includes an outer shroud defining an airflow chamber and a fan which drives airflow therethrough. A motor provides drive to the fan while a plurality of heating coils disposed within the airflow chamber heat the airflow between 1200 and 1700 .degree. Fahrenheit. A fan-shaped attachment is attached about an endcap of the heat gun. The fan-shaped attachment extends into a pair of sidewall surfaces terminating in an elongated port. The elongated port is preferably between 1/2 and 3 inches in diameter and between 8 and 12 inches in length. The endcap of the heat gun is between 1 and 3 inches in diameter. A plurality of ribs connect the pair of sidewall surfaces and extend longitudinally from the endcap of the heat gun to the elongated port of the fan-shaped attachment to define a plurality of longitudinal air passages which evenly distribute airflow along the fan-shaped attachment.

Abstract: An elongated housing has a pair of radiation-transparent strips defining a slit from which hot air is directed at an article to be dried. The air passes over a radiant heater in the housing parallel to the slit and preferably through holes in a reflector which reflects radiation from the radiant heater toward the radiation-transmissive strips.

Abstract: A roasting apparatus for coffee beans and other food includes a removable drum on the housing rotatable about a horizontal axis and drive means on the housing for supporting and rotating the drum. The drum has a plurality of internal vanes arranged such that i) as the drum is rotated in one direction the beans are stirred and retained by the vanes within the drum, and ii) as the drum is rotated in the opposite direction the beans are moved by the vanes toward the drum opening for dispensing from the roasting apparatus. A removable cover includes a safety interlock which, when activated, prevents opening of the cover when the drum is at bean roasting temperature and which automatically deactivates upon cooling of the drum to permit opening of the cover to remove the drum.

Abstract: A hair blow dryer attachment for styling and creating a greater volume of hair is comprised of a base from which a plurality of hollow members project. The base adapts the attachment to a hair blow dryer. The hollow members are arranged and spaced to facilitate insertion into hair to the base of the hair and to support the hair while drying. Each hollow member contains a plurality of apertures which are arranged to diffuse and deliver air from the blowdryer to hair at the base of the head, thus drying the hair at its base.

Abstract: The present invention is a hair dryer apparatus combination designed to allow for detachable and interchangeable arms and bases to hold an electric hair dryer for hands free operation in a variety of situations.

Abstract: A heating and ventilating apparatus for a motor vehicle having either an internal combustion engine or an electric propulsion motor, where the heat given off by the engine or motor is insufficient to provide heating requirements for the cabin of the vehicle under all conditions, comprises an air inlet chamber associated with a blower, and an air outlet chamber which feeds at least one outlet duct, leading to the cabin. A heating branch is interposed between the inlet chamber and the outlet chamber, with heating means arranged in the air heating branch. The heating means comprise a radiant heater having pure or passive resistance, together with a radiant electric heater having a positive temperature co-efficient resistance, the two heaters being connected electrically in series in a circuit which is supplied by a voltage source.

Abstract: This invention comprises a towel warmer wherein the towel is removably mounted on a rack within a closed cabinet. The cabinet includes a heater blower mounted on the upper portion thereof and recirculating tubes on each side thereof to recirculate the warm air after it passes through the towel. The heater blower warms the circulated air and forces it downwardly into the hanging towel. The system is totally enclosed so that the operating noise is greatly reduced and the system uses only a fraction of the electric power conventionally required.

Abstract: In an electric radiator having a frame in which an arranged heat output elements, which include PTC resistors, and heating elements including fins, which abut on these heat output elements. The heating elements are supported by two oppositely disposed frame bars in such a way that they apply pressure to the heat output elements, said frame bars including rails having a U-shaped cross-section with flat legs extending from a central leg which is provided with longitudinally extending bulging portions separated from the central leg to impart spring properties to said bulging portions which is applied to the heating elements.

Abstract: A radiant-heat drier for printing presses or the like has a plurality of spaced radiant-heat drier strips (22) which extend transversely with respect to the conveyance direction and which each have in turn a radiator bar (44) and a cooling air distributor element (24) extending parallel thereto at a distance. On a wall (30) facing the radiator bar (44), the radiator bar has a plurality of air delivery nozzles (32, 34) which terminate in the immediate vicinity of the rear of the radiator element (44).

Abstract: An electric soldering iron is disclosed in which a gas such as compressed air is electrically heated and then forced through a metallic soldering tip which is deeply slotted or finned for maximum heat transfer thereto. Soldering is then accomplished by applying the thusly heated tip to the workpiece. The slots may be formed to exhaust the hot gas forwardly over the tip to add heat to the workpiece and control the gaseous environment thereof; or the slots may be formed to exhaust the hot gas laterally or rearwardly to help in removing pollutants from the operator's environment.

Abstract: An electrically powered bathroom fixture for use in conjunction with a mirror having a straight side. An electrical housing is mounted adjacent to the mirror to pivotally support a telescopic housing. The telescopic housing includes a hot air outlet extending parallel to the straight side of the mirror. The hot air outlet is adjustable to approximately the length of the straight side of the mirror. An end cap, mounted adjacent to the mirror, pivotally supports the opposite end of the telescopic housing. Electrical power is provided to the electrical housing for powering a receptacle with ground fault protection and an electrical hot air source. The electrical hot air source forces hot air through the length adjustable hot air outlet against the mirror. The telescopic housing is rotated between the electrical housing and the end cap to adjust the angle of the hot air outlet and the forced hot air with respect to the side of the mirror to selectively defog the mirror.

Abstract: A system for warming blood or other liquids to body temperature for infusion into a patient. The system includes a blood warmer apparatus having a pair of closely spaced apart heat transfer plates, each of which forms one face of a housing containing flat vapor condensation heating units. A flat disposable heat exchanging blood warming envelope is held clamped between the heat transfer plates. The envelope is provided with an air escape vent covered by a hydrophobic filter eliminating the need for a vent separate check valve. An air heating unit in one of the apparatus housings includes a cool air inlet, heat transfer fins on the walls of the vapor condensation heater unit, a fan and guides for conducting air past those fins and a warmed air outlet. An external elongated insulated air hose is connected at one end to the warmed air outlet and extends to the patient.

Abstract: Apparatus for directing pressurized drying air into a hollow wall or ceiling to aid in drying a wall or ceiling which has become wet generally through a disaster such as broken pipes, flooding, leaking roof, etc., without removing a portion of the structure, but by merely removing a standard wall switch or outlet cover plate, includes a conduit having a first end sized and configured to fit over and around an electrical box as installed in a wall or ceiling and to be secured thereover. The conduit will generally be provided with holes positioned to be aligned with the usual cover plate mounting holes in a wall switch or outlet, or fixture mounting holes in the box itself, through which screws can be positioned to effect securement of the conduit.

Abstract: A method and apparatus of making an artificial flower resembling a dried flower, in which the artificial flower has a plurality of petals made from a fabric, each petal having an upper end with a tip, in which the tips of the petals are heated to a temperature sufficient to melt the fabric in the region of the tips by a heating assembly including a heating coil and a blower, and the petals in areas thereof other than the tips, are protected from the heat to prevent melting thereof, by placing the artificial flower in a recess of a heat sink body such that only the tips thereof protrude from the heat sink body, and as a result, a shrivelled, dried-up appearance is imparted to the artificial flower.

Abstract: A light beam heating system is suited for use in performing local heating. The light beam heating system includes a light source for emitting light, an optical lens assembly for converging the light emitted from the light source on an object to be heated, and a gas cylinder for supplying shielding gas towards the object via a gas regulator, a gas valve, and a gas nozzle. During heating, the oxygen concentration of an atmosphere around the object is maintained to less than 5%. Preferably, the shielding gas is supplied to the object via a temperature regulator so that the shielding gas may be heated to a desired temperature prior to the heating of the object.

Abstract: This invention relates to a device for causing fracture of a brittle material such as a glass. The invention employs at least two fluid streams directed against the surface of the material to be cut. One stream is a heated fluid such as air whereas a second flow of colder fluid such as ambient temperature air is also directed against the surface to be fractured at a displaced location. The combined effect of heating and rapid cooling causes thermal stress and fracture to occur in the material to be cut. The manner of applying the fluid according to this invention produces a highly controllable propagating fracture.

Abstract: An electrothermal color-varying instrument for inducing color change in a color-varying layer includes a heat generating element composed of a sintered barium titanate thermistor in face-to face contact with a heat transmitting member having a heating end portion for transmitting heat to the thermal color-varying layer. The thermistor has:(i) a positive temperature coefficient on the electrical resistance within a temperature range from 25.degree. C. to 70.degree. C.;(ii) a volume resistivity at 25.degree. C. (.rho..sub.25) within a range of 9.8.times.10.sup.-3 to 2.97.times.10.sup.5 .OMEGA..multidot.cm; and(iii) a ratio (.rho..sub.70 /.rho..sub.25) of the volume resistivity at 70.degree. C. to that at 25.degree. C. within a range of 5.ltoreq.(.rho..sub.70 /.rho..sub.25).ltoreq.400.The electrothermal heat generating element generates heat under the application of a voltage in the range of 0.8 to 40 volts and maintains a saturated heating temperature within a range of 30 to 100 degrees C.

Abstract: A pulsed airflow generating mechanism for a blower dryer includes an elongated shaft, a stationary disc, a housing, and a spinning disc. The stationary disc is disposed over the shaft and has at least one port radially spaced from the shaft. The housing defines an elongated passageway for guiding a constant airflow therethrough. The housing rotatably mounts the shaft and stationarily mounts the disc relative to the shaft. The spinning disc is disposed over and connected to the shaft for rotation therewith relative to housing and the stationary disc. The spinning disc is located upstream of the stationary disc relative to the direction of airflow. The spinning disc has at least one aperture radially spaced from the shaft for moving intermittently into and out of registry with the port of the stationary disc to convert the constant airflow received by housing passageway into a pulsating airflow discharged from the housing passageway as the spinning disc is rotated relative to the stationary disc.

Abstract: A heating element for an air flow comprises a channel shaped bracket including a base and side walls at right angles thereto within which is mounted a pair of mica sheets arranged parallel to the base and at right angles to the sides and connected to the sides by ribs longitudinally of the sides with transverse slots within which the sheets slide. Each sheet is wrapped with a heating wire formed into helical coils so that each side of the sheet carries a plurality of parallel helical coil portions with connecting portions wrapped over the edges of the sheet. The sheets are symmetrical and one is inverted relative to the other. Each sheet carries at ends thereof a male and a female connector of the blade and receptacle type so that the blade of one sheet engages into the receptacle of the other sheet.

Abstract: An heater includes an electric heating coil that extends above the sidewalls of an air flow channel. The coil is formed in sections that extend transversely to the channel and are spaced by the width of a coil section to allow two heaters to be arranged face to face for shipping. This arrangement is very efficient because one of the heaters provides protection to the coil of the other of the heaters to reduce packaging costs.

Abstract: A combined radiative and convective rework system is provided for repair, replacement, removal and rework of an electronic component on a printed circuit board. The system includes a guide for guiding heat-inducing radiation and heated gas towards at least one lead of the electronic component, and for preventing the heat-inducing radiation from damaging the body of the component. A heater, including a source of infrared radiation, provides the heat-inducing radiation and the heated gas. In one embodiment, the guide includes a single funnel cooperative with apparatus for reducing component body heating. In second and third embodiments, the guide includes two concentric funnels which form a volume which is traversed by the heat-inducing radiation and heated gas, and which provide at least one narrow region of heat energy to at least one of the leads, but not directly to the component body.

Abstract: A partially cylindrical shaped inner wall forming an arc less than 360 is secured to the inner cylindrical shaped side wall of the toilet outward of the electrical heater coil forming an enclosed inner heat insulation holding space for receiving heat insulation. An ash pan has inner and outer stainless steel pans with their upper ends secured together forming an enclosed space in which are located a copper pan against the inner pan and heat insulation material. An electrical circuit is provided having a timer for controlling the exhaust fan motor and a timer for controlling a temperature controller which drives a relay which is connected to the heater coil. A thermocouple located in the enclosed space in the ash pan is coupled to the circuit for shutting the heater down when the temperature in the bottom of the ash pan reaches a predetermined value.

Abstract: An air heater is used to supply sterile air to an aseptic system for packaging food products. The air heater has an electrical heating element disposed within a tube, and the rate of air flow through the tube is adjustable. The air heater eliminates sources of contamination which are present in prior art air heaters.

Abstract: The temperature of bags of blood or blood components is varied by directing a heated or refrigerated flow of air through vents (138) of pairs of opposing ducts (130A, 130B) longitudinally spaced across gaps to present thermal processing chambers (136) into which the bags are received. The vents are centrally located on vertical tubes (132) laterally separated by vertical air return slots (135), and act to direct the airflow substantially perpendicular and with turbulence against the bags. In a described thermal processing unit (110), the spacings of the vents and tubes are chosen to match the corresponding spacing of vertical tubular chambers (62) of a preferred bag (10) with which the unit (110) can be used.

Abstract: A device for heating flowing liquid or gaseous media has a heating element including a PTC resistor arranged between a pair of perforated metallic bodies serving as power supply terminals for the resistor. The heating element is positioned inside a tubular housing defining a flow path for the medium to be heated and made of two mating housing parts, with the heating element extending across the flow path for flow of the medium through the perforations of the metallic bodies to transfer heat to the medium. A bracket on each metallic body fastens the heating element to the housing and is electrically connected to a contact on one end of a power supply cable molded as an integral part of one of the housing parts and terminating at its other end in an electrical plug outlet on the housing part connectable to a battery or electrical network.

Abstract: In a heating apparatus including a plate-shaped positive temperature coefficient thermistor having a pair of electrode films, a pair of terminal plates of an elastic metal material are provided on the pair of electrode films of the thermistor, and there is further provided a spacer including a mounting through-hole which passes through the spacer in a thickness direction thereof. The spacer receives the thermistor in the mounting through-hole so as to position the thermistor therein between the pair of terminal plates. Each terminal plate comprises at least one extending portion extending in a longitudinal direction thereof from one portion of one end thereof, and the extending portion comprises a stopper piece which is folded toward the spacer, the stopper piece including a hook-shaped engaging stopper at an end of the stopper piece.

Abstract: A heater particularly adapted for use in automotive applications as a passenger compartment heater or the like has a housing with an opening and has a plurality of heat-exchanging fin members and self-regulating electrical resistance heater discs of positive temperature coefficient resistivity (PTC) disposed in the housing to heat air or other fluid which is passed through the housing opening in heat-transfer relation to the fin members. A thermally conductive grease is positioned between the PTC heater discs and fin members to enhance heat transfer. Springs resiliently position the fin members, grease and heater discs in thermally and electrically conductive relation to each other between terminals accessible from the housing exterior to retain the fin members, grease and heater discs engaged during thermal expansion and vibration for reliably energizing the heater discs to heat the fin members over a long service life.

Abstract: A hair dryer includes a plurality of elongated positive-temperature-coefficient (PTC) semiconductor heating units disposed in transverse side-by-side spaced relation in a linear array in a central air flow passage of an elongated tubular duct connected to a discharge port of a casing having an air fan rotatably mounted in the casing for blowing air through the air flow passage of the duct, each PTC heating unit defining a longitudinal axis disposed perpendicular to a longitudinal axis of the air flow passage of the duct and a plurality of elongated spaced fins longitudinally juxtapositionally mounted on the PTC semiconductor heating unit transversely of the longitudinal axis of the PTC heating unit, whereby upon a powering of the PTC heating unit and the fan to heat air as blown by the fan, the heated air will be guided in the tubular duct by the plurality of elongaed spaced fins to produce laminar air streamflow helpful for smoothly setting and drying hair or the like.

Abstract: An electric heater for air supplied to the passenger compartment of an automobile has a plurality of extruded tubular metal members in side-by-side spaced parallel relationship within an open electrically insulative frame. Each tubular member has a pair of spaced heat sinks with a plurality of spaced lamenallae extending therebetween to form air flow passages. A plurality of PTC heating tablets are positioned in the space between the opposed outer surfaces of the heat sinks of adjacent tubular members, with one face of each PTC tablet fixed to one heat sink by a rigid electrically conductive adhesive and the other face thereof is fixed to the adjacent heat sink by a flexible electrically conductive adhesive. The heat sinks have integral platforms on which the PTC tablets are positioned with the edges of the tablets projecting beyond the edges of the respective platforms.

Abstract: A contact heater for soldering and desoldering electronic components that is heated by hot air supplied into a cavity of the contact heater. A thermally conductive heating blade is used to contact an area to be heated, while a heat shield protects adjacent electronic components from external heat generated by the contact heater.

Abstract: An apparatus for electrically heating non-flammable gases, supplied to an applicator gun comprises an elongated housing having an elongated electric heater located centrally and longitudinally therein and a metallic helically coiled tube spaced from and surrounding the heater. The coiled tube is substantially co-extensive in length with the heater and has an inlet end and an outlet end connectable to an applicator gun. An elongated preheating tubing section is disposed length-wise of and surrounded by the helically coiled tube in spaced heat exchange relation with the electric heater. The preheating tubing section has an inlet end connectable to a supply of non-flammable gas and an outlet end connected to the inlet end of the coiled tube.

Abstract: A forced gas electric heater has a serpentine heating element disposed within a cylindrical glass tube. Infrared radiation emanating from the heating element enters the glass tube whereby part of the infrared radiation is directed within the wall of the glass tube to the edge of the glass tube. An infrared sensor is in line of sight with the edge of the glass tube. The infrared sensor senses the hot spot temperature of the heating element and, together with a controller, limits the maximum hot spot temperature of the heating element.

Abstract: A plurality of positive-temperature-coefficient (PTC) semiconductors are longitudinally positioned in an elongated, finned, thermally and electrically conductive hollow casing having a socket at each end. A first plug connector of a power source seals one of the sockets and is electrically connected to the lower conducting surface of each PTC semiconductor through an electrically conductive plate electrically insulated from the casing by an electrically insulative plate. A second plug connector of the source electrically seals the other socket and is electrically the connected to the upper conducting surface of each PTC semiconductor through an upper portion of the electrically conductive casing, thereby providing an electric heater with the PTC semiconductors and plates fully clad by the casing for enhanced safety, increased efficiency, and more stable construction.

Abstract: An electric forced air heating device using PTC elements for heating and having a fixed volume of airflow established by a blower driven at a constant rate. A pair of parallel air paths are established in the device, with one air path having the PTC elements fixedly located therein. A laterally movable damper is used to control airflow through the two air paths, and is positioned proximate the PTC elements a fixed distance therefrom so that as the damper is shifted, airflow proportionally increases through one of the air paths and proportionally decreases through the other air path to control the heat output of the PTC elements. The energization of the PTC elements and blower is controlled by a switch activated by movement of the damper.

Abstract: A device for making or undoing welds between a component with several galvanic connections and a support is particularly suited for surface mounting. In order to direct a stream of hot gas or infrared radiation accurately onto the connections of the component and corresponding weld surfaces, a mask is provided which has openings that exactly match the configuration of the weld surface. Preferably, in the case of hot-air operation, a light source is arranged behind the mask in such a way that the predetermined pattern is reproduced exactly on the substrate in the form of points of light for positioning purposes. In one embodiment, the mask comprises two pairs of horizontally adjustable shields, the two pairs of shields being arranged at an angle of 90 degrees, the shields being made of a material of low thermal conductivity.

Abstract: A heating set having a plurality of positive temperature coefficient thermistor heating elements (PTCR pieces) sandwiched between two heat radiating devices made of metal with each of the PTCR pieces provided with sprayed-on electrodes having their exposed surfaces making close contact with long metal battens on the outer surfaces of the heat radiating devices through conducting thin metal pieces having predetermined surface areas. The PCTR pieces and the heat radiating devices making electrical contact through the thin metal pieces are bonded together by an electrically nonconductive adhesive spread on the border of the battens around the thin metal plate and on opposite parallel edges on the border of the sprayed-on electrodes of the PTCR pieces.

Abstract: An apparatus for generating at least one oriented jet of gaseous fluid that is movable in a direction substantially perpendicular to this orientation is provided, the apparatus including a hollow box (3), in particular a rectangular parallelepiped with rigid walls (3a), at least one flexible belt (7), which sealingly closes each aforementioned window (5) vertically of its edges (6), and which locally has at least one perforation (8) of predetermined dimensions, a driver for each belt (7) for driving the belt along the longitudinal axis (5a) of the window (5) vertically of which it is located, in such a manner as to displace each perforation of the belt in question along the longitudinal dimension of the window, and an injector for injecting gaseous fluid, in particular air, into the box (3) through an opening (11) made in one of its walls.

Abstract: An iron unit adapted to be used with a hair dryer includes an ironing plate formed of a heat conductor having a groove and an exhaust groove in communication with the groove on a lower side thereof providing a contact surface with an object to be heated, and a plurality of air outlets extending from the upper side to the groove. A hot air source receiver includes a mounting plate having a cylindrical member engageable with the hair dryer for supplying hot air. A hot air-feeding space is in communication within the cylindrical member. The mounting plate is attached to the ironing plate, with the hot air-feeding space being in communication with the outside through a plurality of passages. A covering member defines a space on the outside of the engaging cylindrical member of the hot air source receiver. The mounting plate is attached in place with the space being in communication with the outside on the side of the cylindrical member and on the peripheral side of the mounting plate.

Abstract: A container includes a plurality of spaced, "U" shaped grooves to receive a first lid and a second lid, wherein the first lid includes a matrix of apertures for reception of the pouring spout portions of fluid bottles such as those containing engine oil to permit capture and recycling of the oil as required. The second lid is arranged to afford protection to the first lid for permitting intrusion of foreign matter within the container.

Abstract: A sole dryer comprising two electric air blowers respectively controlled by two trigger switches to blow heated air currents for drying the soles of the legs placed on a cover thereof, and a plurality of supporting spring means to automatically push said cover back to its original position so as to disconnect said trigger switches after the removal of said legs from said cover.

Abstract: This dryer system for concentrated drying of water-damaged building surfaces in typical residential and commercial constructions is temporarily attached during the drying process and is removed after the damaged area is dried. The dryer system comprises a high-volume, forced air blower attached to an air diverter selected from a variety of different diverters configured to attach to various flat surfaces or corners in a room. The blower may operate remotely from the diverter when they are connected by an air duct. The system forces dry air between partitioning studs in walls, through flutes typically found in tongue-in-groove flooring, and similarly behind ceilings. The moisture-laden air leaving the wall, floor or ceiling may be captured with a diverter and duct and dried by a dehumidifier before recirculation back through the system or the air may be ducted outside of the water-damaged area. An air heater can also be combined with the blower to enhance the drying process.

Abstract: A heating apparatus for heating thermoplastic packaging materials to allow the materials to be heat-sealed, formed, or reformed includes two nozzles which supply heated air to the packaging materials, a suction box which sucks the heated air away from the packaging materials after the air has heated the materials, and a recirculation duct which recirculates the heated air from the suction box back to an intake of the nozzles.

Abstract: A hair dryer that includes a case having a handle and a barrel, and a fan positioned in the barrel and coupled to an electric motor for blowing hair through the barrel. An electrical resistance heating element is disposed in the barrel for generating heat to dry hair, and an electrical cord extends from the handle and terminates in a plug adapted to be removably received in a utility outlet for supplying power to the hair dryer. An operator switch is carried by the handle and connected in series with at least the electric motor across the power lines of the cord. An audible alarm is connected across the switch and in series with the motor across the power conductors of the plug and cord, such that placement of the switch in an open condition, with the plug inserted in a utility outlet, results in current flow through the alarm device and generation of an audible alarm signal.

Abstract: A hand-held hair dryer includes a shroud surrounding an electric heater and defining a passage for delivery of blown air from a blower to a heated air exhaust opening at an end of the shroud. The shroud is provided with a plurality of smaller air exhaust orifices adjacent to and/or forward of the heater upstream of the air exhaust opening. The orifices are arranged in one or more rows and each orifice is associated with a metallic secondary heat transfer means for improving transfer of heat to the exterior of the shroud. The part of the shroud containing the orifices may be rotatable about the circumference of the shroud to change the direction of air flow. The heat transfer means may comprise a single metal plate containing the plurality of orifices or an individual metallic member associated with each orifice.

Abstract: A heater assembly (10) is for installation in a clothes dryer (D). The assembly includes at least one open coil heating element (12), and a plurality of insulators (16) to each of which a convolution of the coil is attachable. The insulators are mounted on a support (22) in a spaced relation from each other. The support is attachable to a multi-sided pan structure (30). The pan has sidewalls (32A, 32B) to which the support is attachable for installing the coil in the pan. The pan has a lip (54) which extends beneath one end (54) of a heating unit (U) section (S2). The pan is directly attachable to the unit and the unit directly installable in the dryer. The heater assembly is also formed to help install the unit in the appliance during its manufacture.

Abstract: A heating coil assembly for use in an air blower device has an annular support element, a first end cap, a core having a heating coil spirally wound thereon, a sleeve surrounding the coil and core, and a second end cap. All components have a centrally disposed non-circular bore therein for receiving a heavy gauge non-circular wire retainer, swaged at one end, which extends through the entire assembly and is retained by a press washer at an opposite end. The interior of the sleeve is spaced from the coil forming an axial channel for air flow over the coil. Axial openings in the end caps form air inlets and outlets for the channel. The coil has several leads, at least one of which extends through an axial opening in one of the end caps. The heating coil assembly has a small number of components, which are easily assembled and simultaneously axially and radially positioned and retained relative to each other by the wire retainer.