Abstract: A connector which acts upon itself contains a fusible bonding material the connector forming a part of a temperature autoregulating electrical heater whereby upon application of a generally constant a.c. current to the heater, the temperature of the heater rises to and is maintained at slightly above the melting temperature of the fusible material.

Abstract: A hair curling iron and apparatus for heating same are provided. The hair curling iron is comprised of a pair of elongated heat conductive semi-cylindrical tubular barrels having an inner flat surface. The barrels have handles and are pivotally connected together whereby the flat surfaces of the barrels may be brought together enclosing hair between. When closed together, the outer shape of the barrels is round, around which the hair is wound to give a curling effect. The size of the barrels, however, is such that the curling iron can not be readily placed in the heating chamber of a conventional curling iron oven. Thus, the instant invention provides for a heat conducting plate having vertical heat conducting rods to be fixed to the top of the oven in heat transfer relationship therewith. The barrels of the curling iron are hollow and open-ended and fit over the heat-conducting rods whereby the curling iron may be heated.

Abstract: An anti-pollutant soldering iron protects workers against pollutant residual vapors resulting from soldering by operating an air moving fan, or the like, to create a suction air stream in a housing which guides pollutant residues trapped therein to and through a retaining filter and then directs the filtered air to the atmosphere. The air moving fan, or the like, may also be reversed to force the residual vapors away from the soldering iron.

Abstract: A soldering device has two or four stirrup electrodes secured to a soldering stirrup holder and a centrally-arranged suction pipette between the stirrup electrodes for picking up, conveying and placing components onto assigned soldering locations. Sensitive mechanical and electrical parts, particularly machanical guides and electrical contacts are protected against undesired precipitation of soldering vapors that arise during the soldering process. This protection is achieved by an extraction device for solder vapors which includes an annular extraction opening between the suction pipette and the soldering stirrup holder. The extraction opening discharges into an extraction chamber arranged above the soldering stirrup holder and is in communication with at least one extraction port.

Abstract: An electrically heated soldering iron which is particularly adapted for surface mounting components on printed circuit boards. A unitary member rotatably joins together a pair of channel-shaped arms and resiliently biases the arms in a normally open position which is defined by a pair of overlapping members in the center portion of the iron. The arms are selectively moveable by a user toward each other to a closed position and the channel portions of the arms are adapted to retain the unitary member, the pair of overlapping members, and detachable assemblies of U-shaped soldering tips for applying heat to surface mounted electronic components. The U-shaped soldering tips are comprised of dissimilar conductors joined together to unitarily provide a soldering tip, heating element for heating the tip and a thermocouple for sensing the temperature of the tip.

Abstract: In a soldering system which utilizes a fine jet of very hot gas for heating the work point the hot air may impinge directly on the work point or it may heat a soldering tip from within whereby it may be used in a more conventional mode of soldering or desoldering. A regulated flow of gas to the heater of the soldering instrument may be somewhat preheated by passing along the leads carrying the electric power to the heating element. The same supply of air may also be used to cool the handle of the handle of the soldering instrument for operator comfort and safety. The temperature of the heating element is remotely electronically controlled by a time share use of the power leads as temperature sensing and feedback.

Abstract: The invention is a device for dispensing melted resin on a surface. In detail, the invention includes a housing having an inlet and an outlet passages and a guide passage therebetween. The inlet passage is adapted to receive a solid resin rod and the outlet passage includes a nozzle for dispensing the melted resin to the surface. Also included is a mechanism to sequentially move the rod from the inlet toward the outlet passage. Additionally, a heating coil is positioned about the outlet passage. An air transfer tube is provided having an inlet coupled to and a source of pressurized air and an outlet in proximity to the nozzle. The tube includes a first coil section mounted about the heating coil so that the pressurized air is heated prior to reaching the nozzle such that the surface is heated.

Abstract: An auxiliary soldering device for electric solder iron includes a sleeve member fitted to a handle of the iron, a connecting seat disposed on the sleeve member, a first guide pipe located adjacent to a rear end of a connecting seat and a second guide pipe located adjacent to a front end thereof. The second guide pipe extends forward to the tip portion of the electric solder iron permitting a soldering wire to be fed through the guide pipes to the tip portion of the iron. A pressing plate engaging the soldering wire and a vane member are pivoted to the connecting seat with the vane member located above the pressing plate. The vane member has an elastic pushing plate downward extending to abut against the soldering wire, whereby pressing downward the front end of the vane member, the wire is advanced by the pushing plate through a certain distance for soldering use.

Abstract: A tool for removing mirror brackets and tabs therefor from windshields of automobiles and the like. The tool includes an electrical heating apparatus which permits single-handed operation. The tool operates quickly and efficiently without damaging windshields or other glass components.

Abstract: An electrical soldering gun for pipe soldering has a plastic case with a pistol grip handle and a single elongated electric heating element extending longitudinally of the case. A first soldering jaw with recesses is disposed on and extends axially of the heating element and has directly hingedly connected in heat exchange relationship therewith with a second jaw provided with complementary recesses for cooperating with the first jaw recesses to receive and grip a pipe to be soldered. The second jaw is connected to a slidable trigger on the casing by a pull rod for manually pivotally moving the second jaw away from the first jaw against the force of a spring associated with the trigger normally biasing the push rod and second jaw toward the first jaw.

Abstract: A vacuum pickup tool (10) having a handle (16) and a barrel (22) mounted thereto with a tip (24) that is heated by a temperature control unit (114). The barrel (22) and tip (24) include a longitudinal axial bore (41) attached to an air source through connector (116) to provide vacuum through an axial opening (62) and the tip (24) to hold a Z-clip (74) to the barrel (22). Actuation of a trigger (28) deactivates the vacuum and simultaneously heats the tip (24) to solder the clip (74) onto a wire wrapped pin (64) inserted through a circuit board (66). A thermocouple (54) and controller 114 monitor and control the temperature of the tip (24) as preset by the temperature control (114) on an instrument assembly (96).

Abstract: A miniature light-weight electric soldering iron includes a hollow handle terminating in a conical air deflecting arrangement through which a cone-shaped curtain of relatively high velocity air is applied to the work area in a circular or elliptical region surrounding the point at which molten solder is being applied by the hot soldering iron tip thereby entraining and dissipating noxious fumes which may be generated from the soldering flux by the hot soldering iron tip. In one embodiment, the soldering iron handle is provided with a plurality of wall air inlet openings and a tiny motor and fan are incorporated to draw air into the handle through these openings and then direct it out through a truncated cone-shaped deflector to develop the air curtain. In another arrangement, the motor and fan are dispensed with and the cone-shaped deflector is coupled to a convenient pressure source, such as an air line. The flow of air further serves to maintain the handle at a comfortably cool temperature.

Abstract: A soldering device has a container for accommodating solder bodies, a soldering head, a tubular guide for guiding the solder bodies to the soldering head, and a slider formed to take the solder bodies from the container and transfer them into the tubular guide.

Abstract: A desoldering system utilizes a hot air soldering instrument which includes a hollow elongated cylindrical heating element capable of generating a high temperature. The cold input air is forced to move about the outer surface of the heating element. It is then directed to move between the inner surface of the heating element and the outer surface of an inner tube, whereby a primary and a secondary heating chamber are provided. In each heating chamber an open coil form or spring may be disposed to further increase the tortuous path of the air, and the heated air exits from the inner tube into a soldering tip from it is discharged, thus to provide a very hot air jet for soldering or desoldering purposes. Various modified instruments are disclosed for permitting either a hot air jet tip or a conventional soldering tip to be used. Also, a permanent air connection is featured in another modification to obviate the necessity of disassembling the air hose and other connections.

Abstract: Apparatus for supplying light and heat of variable intensity to a photocurable dental material. The apparatus includes a source of light, a reflector, a filter assembly, a light guide and an electrical fan. The heat is generated from the light source and is controllably directed by an arrangement of louvers with a manually adjustable lever through a passageway surrounding the light guide to the operatory site.

Abstract: A plastic welder that can be held and operated with only one hand. The supply rod or filler rod can be advanced into and through the heating tip of the welder by a trigger that can be actuated by the user with the same hand in which the grip of the plastic welder is held. No air assist is required, as a device is provided for reliably avoiding overheating of the plastic welder by intermittently interrupting the electrical current feeding the heating element at times automatically determined by a temperature setting selected by the user. The heating tip is formed of a major portion of steel infiltrated with a minor portion of copper. The temperature of the heating element with the welder in inoperative condition is maintained at a predetermined level above the temperature of the heating tip when the welder is operative and in use.

Abstract: Soldering apparatus of the kind having a replaceable tip element including a soldering face and having a frame portion and a tip retaining portion adapted to retain the tip element in heat conducting relationship with the frame portion. The soldering apparatus is characterized in that the frame portion incorporates a contact assisting formation adapted to embed itself at least partly into the tip element remote from the soldering face to thereby reduce electrical resistance between the tip element and frame.

Abstract: A sealant injector for use in repair is provided with a sealant nozzle formed in a forward end of an injector body. A piston is slidably fitted in the injector body, and cooperates with the forward end of the injector body to define therebetween a sealant chamber capable of being filled with sealant. A coil spring is arranged within the injector body, and is provided with such a shape memory effect that when heated, the coil spring biases the piston toward the forward end of the injector body to inject the sealant through the sealant nozzle. A heating unit is associated with the injector body, for heating the coil spring.

Abstract: Automatic portable unsolderer consisting of a solenoid supplied by alternating current, a cylinder whose piston has a rod consisting the core of said solenoid, including too a reservoir and a heating member, all of them axially engaged as above-mentioned. Through the heating member end, the material that has to be unsoldered is melted and through operation of the solenoid, the piston draws back and suctions said material, which is collected, in a solid condition, in the reservoir which includes a retaining member, easily removable, and a threaded plug. On the outlet of the reservoir a one-way valve is disposed so that the air compressed by the piston, through a return spring that encircles the rod, doesn't flow through the suction conduct avoiding in such manner that the air can drag soldering material particles. The ejected air is by-passed through a side hole provided with a one-way valve that is reversely oriented.

Abstract: A solder tip includes a transfer slot having a shoulder portion for containing a connector pin during heating and soldering. The shape of the slot increases the surface area between the soldering iron and the body of the connector pin to speed heating and shoulder portion permits pressure to be applied to the end of the connector pin during soldering. The slot is further configured to facilitate a roll-off soldering method whereby the solder tip is rotated to lift the connector pin out of the slot after the solder has been applied.

Abstract: A hair styling curler including a handle supporting an electrically heated barrel and having a manually pivotal curling clamp is provided with a safety device for preventing burns. The safety device includes a plurality of spaced non-heat conductive ribs carried on the surface of the clamp remote from the barrel which are cooperate with corresponding plurality of radially extending non-heat conductive ribs carried on the outer surface of the barrel to define a plurality of spaced annuli completely circumscribing the barrel and which prevent contact of the heated barrel by the user yet allow hair contact with the heated barrel between adjacent annuli for imparting a curl thereto. The spaced ribs on the barrel are interconnected by tracks to form a unitary assembly which is mounted on the barrel by insertion of the tracks into complementary trackways formed on the outer surface of the barrel and accessible by a removable end cap on the barrel end distal from the handle.

Abstract: A hair curling apparatus includes a single elongated thermally conductive heating mandrel secured to the end of an elongated handle in axial alignment therewith and having two wide similar opposing surfaces joined by two narrow convex opposing surfaces with a radius of about 0.09 inch. The mandrel as of such length that hair strands may be helically wrapped therearound in a plurality of turns and a spring-biased manually operable hair clamp is pivotally mounted at the handle end of the mandrel for clamping the ends of the hair strands against the mandrel before they are helically wrapped therearound. The mandrel may have a generally oval or flattened shape. The clamp has a clamping surface which extends across a portion of one of the wide surfaces while exposing substantially all of the convex surfaces to direct contact with the hair strands and extends less than about 50 percent, and preferably about 30 percent, of the usable length of the mandrel.

Abstract: A battery powered electric curling brush/iron includes an elongated cylindrical electrically heated wand detachably connected to the end of a hollow handle by a pair of separable electrical connector terminals. The handle houses rechargeable batteries for supplying electrical power to the wand through the connector terminals and a charging circuit for recharging the batteries from an external AC household source through a connector plug movable from a retracted position in the handle to an extended position projecting through an opening in a wall thereof.

Abstract: An adjustable heater bar arrangement (8) for integrated circuit attachment and removal apparatus including a base plate having four slots (14) in which heater bars (12) are slidably mounted and held in position by clamping screws (18). By directing the slots (14) at an appropriate angle, inward and outward movement of the heater bars (12) is accompanied by lateral movement of each heater bar (12), such that the device (8) may be adjusted to accommodate large and small sized ICs (13A, 13B), as well as lot-to-lot variations between ICs (13A, 13B). For example, to accommodate a square IC (13A, 13B), each slot (14) extends outward at an acute angle of 45 degrees, respectively, with reference to the sides of a substantially rectangular base plate (10).

Abstract: An electric curling iron has a handle and unitary curling structure with first and second elongated generally aligned oppositely extending shell sections aligned oppositely extending shell section. Each section is provided with a separate PTC resistance heating element and the two shell sections have different diameters and/or different bristles and/or at least one hair clamping arm. The handle is adapted to be selectively slipped onto either of the two shell sections, whereby at the same time an electrical connection is established between the heating element in the other shell section and an electrical power supply on the handle.

Abstract: A dual temperature hair curler has a hollow heat transmitting metallic barrel enclosing a pair of PTC heaters connected in series to each other and electrically insulated from the barrel by an oxide-filled silicone rubber material. The PTC heaters have different anomaly temperatures and a switch arrangement is provided for (1) energizing the higher anomaly temperature heater a series with the lower anomaly temperature heater to produce a low temperature limited by the anomaly temperature of the lower temperature heater and (2) effectively energizing only the higher anomaly temperature heater to produce a high temperature limited by the anomaly temperature of the higher temperature of the higher temperature heater by bypassing the lower anomaly temperature heater.

Abstract: Provided is a cartridge soldering iron having a hollow cylindrical handle, incorporating an internal coaxial socket assembly, a connection to a power supply, and a cartridge housing support, and a soldering tip bearing cartridge incorporating a tip, a heater assembly, a tubular housing and a coaxial socket assembly adapted to mate with the handle socket assembly in a wiping electrically conductive manner.

Abstract: An electric curling iron includes a handle containing a reversible DC motor for rotating an elongated, generally cylindrical curling mandrel extending from the front end of the handle and coupled to the motor by a clutch so as to prevent injury to the user. The mandrel is electrically heated and controls are provided on the handle for selecting the speed and direction of mandrel rotation as well as the level of mandrel heating. A clamp for releasably retaining a strand of hair is carried by the mandrel for rotation therewith. A manually activated actuating mechanism on the handle is designed to allow opening and closing of the clamp while the mandrel is rotating.

Abstract: A hot melt adhesive applicator operable at a number of selected temperatures having a portion of the circuitry for control of the applicator temperature at a point remote from the applicator body. The remotely located circuitry employs a differential amplifier and a zero crossing detector for controlling the operation of a triac which, when turned on, increases the temperature at the applicator. The operational amplifier is protected by a clamping circuit from receiving a signal, when a temperature setting is changed from a high to a low setting, that would otherwise cause the differential amplifier to provide an output required for turning on the triac which would cause a run away condition to exist.

Abstract: A method and apparatus for manufacture and repair of thermally durable surface mounted device printed wiring assemblies which includes a printed wiring assembly having surface mounted devices thereon, which are attached to said wiring assembly by a quenched or rapidly soldified soldier joint. A method for manufacture and repair of such printed wiring assemblies is to heat the TWAs with SMDs thereon, above the solder melting temperature, and then expose the solder to a fluid below the solder melting temperature which is capable of absorbing heat rapidly from the solder. The intermediate solder joint is thereby rapidly solidified to achieve the advantages of the investive method.

Abstract: An in-line solder extractor and a tubular heating assembly for use therewith having a tubular tip disposed within the tubular heating assembly a hollow handle, the heater assembly being mounted with respect to the forward portion of the handle a solder collection chamber disposed within the handle, and forward and rearward seals for sealing the forward and rearward ends.

Abstract: A hair appliance has a hair winding portion extending axially from the end of a handle covered by a flexible sleeve member adapted to be depressed in order to activate a movable part of the hair appliance. The hair appliance is of relatively uniform cross-section along its length and in the case of a curling iron provided with a hair retaining clip biased adjacent the barrel of the curling iron, the clip is provided with a longitudinal extension aligned with the body of the clip, with the extension overlying a recess in the handle and under the flexible sleeve member. The clip is opened by squeezing or depressing the flexible sleeve member to move the extension into the recess. In the case of a curling brush having a rotatable barrel, a similar construction results in the barrel locking mechanism being situated under the flexible sleeve member so that depression of the latter operates the locking mechanism.

Abstract: A desoldering device is disclosed having a solder transferring tube in communication with a solder collection chamber and a pivotal handle attached to the solder collection chamber so that the handle may assume within a plane different angular positions with respect to the solder transfer tube without affecting proper orientation of the tubular front portion with respect to a workpiece. Moreover, a switch for controlling the vacuum is disposed on the handle and the handle is rotatable about its own axis so that the vacuum switch may have various orientations with respect to the plane in which the handle may assume different angular positions.

Abstract: An forward seal for a desolderer assembly, comprises a seal mounting means which is spaced from the suction tube. The spacing allows application of higher heat by the heater assembly and desoldering tip combination which facilitates rapid heating of the tip to soldering melting temperatures. An improved heater assembly is also provided which may be removably connected to the desolderer handle. The solder collector tube may be disposed within the desolderer handle and mounted with respect to an outer sleeve of the heater assembly. Means are provided for connecting the heating wire to the space outside the solder collector tube. Means are also provided for removably connecting the desoldering tip within the heater assembly. A removably rear housing including flexible gripping members is mounted at the rear of the desolderer handle.

Abstract: An electrically heated tool for appyling an anchoring device having a forwardly protruding nose carrying a hot melt adhesive and a rear recess surrounded by a circular rim has a housing having a head portion and a handle. The head portion has a planar front wall provided with a front recess dimensioned to receive the anchoring device. An electric heater in the head portion has a platen, dimensioned to extend into the rear recess of the anchoring device, protruding into the front recess. The dimensions of the front recess and platen are such that the nose of an anchoring device received in the front recess with the platen extending into the rear recess of the device and in contact with the rear of the nose thereof protrudes slightly forwardly beyond the plane of the front wall so that the nose of the device can be firmly pressed against a surface to obtain secure bonding of the device after the heater has been energized to melt the adhesive.

Abstract: A portable holder for a hand held type electric soldering iron which iron includes an insulated handle, a heater section and a bit. The holder includes a first support and a bit support supported in spaced relation on a base. The first support and the bit support are adapted to support an iron in a first position wherein the iron is in a stand-by or storage position with the bit in the bit support. The bit support has a shield of material to inhibit air flow about a bit contained therein. The bit support is constructed such as to prevent direct accidental contact with it. A second support spaced from the first support is with the first support adapted to hold an iron in a second position wherein the iron is held in an operable soldering position. The base is provided with a plurality of peripherally located posts about which the electric cord of the iron may be wrapped for storage.

Abstract: A bobbin assembly for a soldering/desoldering device may be readily produced by utilization of a heater assembly comprising an electrically insulating tape having an etched foil heater in the form of serpentine comprising a plurality of coextensive side by side parallel leg portions bonded to one side thereof. The bobbin assembly is formed by wrapping the heater assembly about a cylindrical bobbin with the heater leg portions parallel to the bobbin axis so as to form a first insulating layer in contact with the bobbin, a layer comprising the heater in contact with the first layer and a second insulating layer in contact with the heater. A wire is then wound about the entire assembly, in a helical manner, to hold all elements in place. Additionally, a dissimilar metal lead may be spot welded to the bobbin to form a thermocouple junction used for sensing the bobbin assembly temperature.

Abstract: A hand tool for applying hot melt adhesive which minimizes leakage and enhances the speed and convenience of adhering one material to another. An applicator roller receives liquefied adhesive through an adjacent slot in an upper part of a retention chamber. The slot is at the top level of the liquefied adhesive when the tool is in its rest position. On the outside of the chamber, and below it, a brayer roller is provided for pressing one material to another to complete the adhering process. The tool must be tilted forward to provide adhesive to the applicator roller while it is rolled across the material, and tilted back somewhat to lift the applicator roller and to press down on the material with only the brayer roller.

Abstract: A portable electric battery operated hair curler having a handle detachable from a curling barrel provided with an electric heating element. The handle contains rechargeable batteries and a recharger, and has a first set of electrical connectors at its front end for mating with a set of electrical connectors at the back end of the curling barrel. The handle further includes a second pivotally mounted electrical connection means in the front end of the handle connected to the battery charger for connecting the charger to an external power source. The pivoted second connection is accessible for use only when the barrel is detached from the handle and is then movable from a stored position in the handle to a position projecting from one side of the handle for connection to the external power source.

Abstract: Since the hair well absorbs far infrared radiation in the range of 5 to 10 .mu.m, a material for radiating the far infrared rays having such a wavelength band, more specifically, ceramics, such as zirconia magnetite or alumina, is used on the outer surface of a rod of a curling iron. By applying a ceramic which can radiate far infrared rays to a rod of a curling iron, the temperature of the rod may be decreased to a level from 100.degree. C. to 150.degree. C. The ceramic layer is further coated on its outer surface with a metallic anti-corrosion layer of nickel-chrome or nickel-aluminum to withstand chemicals.

Abstract: An electric hair styling tong includes a pair of elongated arms pivotally articulated to each other at one end and each carrying at its other end an electrically heated pad arranged with its face confronting the face of the other pad and with the face of one pad being smooth for hair straightening and the face of the other being undulating for hair crimping. An intermediate arm movably mounted between the articulated arms carries an intermediate plate provided on on side with a smooth face selectively engageable smooth pad face and on the opposite side with an undulating face complementary to and selectively engageable with the undulating pad face. The intermediate arm may be selectively latched to one or the other of the articulated arms to maintain either the confronting undulating faces or the confronting two smooth faces in engagement, enabling the other of the confronting smooth or undulating faces to be used to treat the hair.

Abstract: A hot-melt dispenser or glue-gun is provided with a two-element sleeve at the inlet to the melt chamber, the elements being separated by a thermal barrier to reduce heat flow from that sleeve element in direct contact with the melt to the other sleeve element thereby inhibiting undue softening or even premature melting of the rod of thermoplastic composition held within the sleeve as it is fed to the melt.

Abstract: A portable decal stripping tool particularly adapted for the quick removal of adhesive decals from an automotive surface and comprising a decal stripper attachment for a soldering iron including an elongate shaft with a head portion secured thereto adapted to removably engage and support a razor blade. The decal stripper attachment is constructed of heat conductive material which facilitates elevation of the temperature of the razor blade secured therein so that it will slide under and remove a decal by melting the adhesive securing it to an automobile surface or the like.

Abstract: A dual temperature curling iron has a plastic handle and a metal barrel connected thereto. An electric heater positioned within the metal barrel and is arranged to rapidly heat the barrel and is selectively controlled by either a low temperature thermostat or a high temperature thermostat located within the barrel to provide heat to the metal barrel. A hair clamp is pivotally mounted on the metal barrel, and when opened, causes a switch to generate an in-use signal which is fed to a safety timing circuit. The timing circuit is reset each time it receives the in-use signal. In the event that no further in-use signals are received, the timing circuit, after a preselected interval, provides a signal to a silicon controlled rectifier which is connected to the electric heater causing the silicon controlled rectifier to interrupt electric power to the electric heater. The curling iron is provided with a visual signal for indicating that has reached the selected temperature and is ready for use.

Abstract: A device for dispensing molten thermoplastic material which an operator grips while using his thumb to press a solid block of the thermoplastic material through a sleeve and into a heated melting chamber from which the molten thermoplastic material is discharged through a nozzle. The device includes a magazine assembly adapted to hold a stack of thermoplastic material blocks which can be moved seriatim into the sleeve by reciprocation of the slide.

Abstract: An electrical work-in-circuit heating tool for metal bonding especially in cramped locations where flame heating and tong-style tools are not usable. The tool comprises a hinged pair of spring-loaded arms having electrically insulating open-ended handles each of which contains a conductor bar within a grip portion thereof. The hinge comprises pivotally joined radial webs and the spring-loading is adapted to urge the distal ends of the arms toward each other. Each of the conductor bars is connected within an insulating grip portion of the handle to an electrical supply cable. At the distal end, each conductor bar carries a detachable electrode assembly that comprises a workpiece-contact member. A switch which is part of a low voltage power supply is removably mounted on the handle. Various configurations of electrode assembly are provided comprising different workpiece-contact members, such as a carbon block on each conductor bar, or a contact member on one bar and a ground clamp on the other.

Abstract: A soldering iron is provided of a type in which the solder is fed through the interior of the soldering iron to the tip, which is heated by a heating element in the soldering iron. In order to prevent the solder from melting before it reaches the tip, as a result of the heat transmitted from the heating element to the solder, the soldering iron is provided, e.g. on a feed tube for the solder, with an inlet for a coolant, e.g. water or air, which is made to flow through the interior of the soldering iron around the solder, thereby cooling the surroundings of the solder.

Abstract: An electric hair curler comprises a handle and a barrel connected thereto for winding thereabout the hair. The barrel is provided with an electric heater for curling the hair wound on the barrel. The heater includes a plurality of resistor elements in the form of strips extending along the length of the barrel in generally parallel relationship with one another and being electrically connected in series by a corresponding number of bridging segments. The heater thus constructed is mounted on the barrel with the resistor elements thereof being exposed on the outer surface of the barrel in circumferentially spaced relationship with one another around the barrel, so that each of the resistor elements is in direct heat transfer contact with the hair to be wound on the barrel, thus greatly reducing the heat loss to assure effective heat transfer from the heater to the hair.

Abstract: A dispensing container for dispensing molten plastic into a mold, the container being piston operated and having a heater inside the container for minimizing the time required to melt solid plastic. The heater extends axially of the container while passing in sealing engagement with the piston which therefore slides upon the heater during its movement. The heater is preferably mounted at one end about a universal mounting from which the heater freely extends. This mounting allows for slight movement of the heater laterally if misalignment with the piston occurs.

Abstract: An electrically heated tool for heating a pipe connector sleeve in order to melt solder therein or applied thereto to secure the sleeve to a pipe has a pair of arms (1) hingedly connected to one another between their ends by a pin (2) in the manner of pliers. An electric heating unit (3) having an elongated shaft portion (9) enclosing an electric resistance heating element is detachably secured to and projects from one and the same end of each arm. The free end of each shaft portion (9) is detachably slidably inserted into the tubular shank of a metallic head part (4) having a semi-circular recess (4a) of a radius substantially equal to the radius of the pipe or sleeve to be heated. The arms are movable between an open position in which the recesses are spaced apart and a position in which the recesses are closed together around a pipe connector sleeve so as to apply heat thereto.