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5138136 |
Method, circuit and apparatus for supplying an electrical current to a resistive heating element
The invention relates to a system for processing an electrical power supply signal for a resistive heating element. The circuit provided comprises an a.c. current source, a rectifier and a chopper...
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5137591 |
Conductive polymeric heater
A method and article for joining two substrates or repairing a substrate comprising positioning in thermal contact with and surrounding the substrate(s) a tubular article comprising conductive...
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5130518 |
Electric welding apparatus for automatically welding heating coil fittings
In an electric welding apparatus for automatically welding heating coil fittings substantially of plastic material a scanner (3) for scanning fitting data is connected via a converter to a first...
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5125690 |
Pipe joining system and method
In a plastic pipe joining system a plastic sleeve is provided to extend on both sides beyond the region of contact or closest approach to one another of pipes to be joined with the sleeve being...
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5122641 |
Self-regulating heating cable compositions therefor, and method
A method for producing a self-regulating heating cable is provided. A first conductive constituent is cryogenically cooled to a temperature at least as low as its glass transition temperature, and...
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5120509 |
Method and apparatus for reducing defects in SOI structures
A method and apparatus for reducing branching, reducing defects, and improving the overall surface morphology of silicon on insulator (SOI) structures produced by Zone Melting and Recrystallization...
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5116082 |
Electrofusion of electrofusion joint, method of confirming state of fusion and fusion joint suitable for use in the methods
An electrofusion joint includes an electrical heating wire embedded in its inner peripheral region. The electrofusion joint can be fitted to an end of a plastic pipe. By supplying electrical...
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5117094 |
Heat recoverable article
A heat recoverable conductive polymeric tubular article shrinks radially when electrical current is passed therethrough. It is powered by elongate electrodes extending along the article along part...
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5113049 |
Flexible induction heating coil
A flexible induction heating coil comprising an elongated flexible core having proximal and distal ends. The core includes a plurality of core segments flexibly interconnected to make the core more...
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5107098 |
Profiled sheathed wire for forming into an electric resistance welding insert
A wire-form element consists of at least one resistive wire coated with a thermoplastic material. The coating features mechanical fixing parts one of which is designed to cooperate with the other...
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5104468 |
Method of producing a molded connection piece and method for joining tube with molded connection piece
There is provided a molded connection piece and a method of making the same, in particular a boring saddle made of thermoplastic material and having a heating wire capable of conducting an electric...
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5100494 |
Structural bonding and debonding system
Two pieces (12 and 14) of material are releasably bonded together with a thermoplastic adhesive (28) in which a heating element (30) is embedded. After application, the adhesive (28) cures at...
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5086213 |
Device for detecting, during welding, variation in the physical state of the plastic material in a coupling piece of joining pipes
The invention concerns a device for detecting variations in the physical state of the plastic material in a coupling piece used for welding pipes and incorporating a heating resistor, cavities...
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RE33716 |
Coupling devices for use with electrofusion fittings of thermoplastic material
A coupling device (1) for use with an electrofusion fitting (14) so as to identify the fitting and to provide an indication of the period of time for which such fittings should be electrically...
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5051563 |
Surface heating element for components of tools and machines
A device for heating components of tools and machines has another ring and an annular or tubular part which is surrounded by the outer ring. The annular or tubular part has a heatable surface and...
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5049724 |
Thermal protection blanket for a blow out preventor
A thermal protecting blanket for a blow out preventer. The blanket is specially adapted for use in hazardous environments. It includes a flexible cover custom fitted to the shape of the blow out...
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5040700 |
Melted cheese dispenser warming method and apparatus
A method and apparatus for performing the method wherein pump spouts for melted cheese utilized on food snack products and the like which includes a fully insulated and heated jacket for a pump...
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5037500 |
Method and apparatus for joining tubular plastic parts by welding
A heating arrangement (2) embracing tubular parts (1a, 1b) of plastic material which have to be joined by welding, comprises electrically heatable jaws (26). A bladder (50) expandable by compressed...
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5032702 |
Tool for soldering and desoldering electrical terminations
A tool for use in soldering a single termination of a wire end to a terminal solder tail or other wire end within a dielectric sleeve enclosing a solder preform, and in desoldering a single...
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5017758 |
Non-thermostatically controlled high power oil pan-heater
A selected quantity of lubricating oil in the reservoir of an oil system exposed to low ambient temperatures is maintained at a temperature above 170 degrees F. but below the oil breakdown...
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4994655 |
Electro-fusion joint
This invention relates to an electrofusion joint, in which the electric power is supplied to a heating wire, which is buried in a resin, to melt the resin and thereby connect pipes together, and...
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4987291 |
Heater straps
An elongated flexible heater strip is provided having a transmission line section and a heater section employing a high mu material to control temperature at the Curie temperature of the high mu...
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4980537 |
Electric heating device
In the case of a heating device (1a) particularly suitable as a continuous flow heater, on an outer surface (4a) of a wall (3a), a tubular heater (6a) and a heat conducting element (10a) are so...
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4978837 |
Method and apparatus for electrically heat welding thermoplastic fittings
An improved method and apparatus for electrically heat welding a thermoplastic fitting having an electric resistance heating element disposed therein. A controlled quantity of electric power is...
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4968247 |
Cam operated clamp housing for injection molding heaters
A clamp housing for cylindrically wound heaters, particularly for an injection molding nozzle heater has a slit that permits changing the effective diameter of the housing and it is actuated by an...
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4954670 |
Cable splice case
A telecommunications splice case comprises a flexible sheet that can be wrapped around the splice and optionally further surrounded by a rigid casing. The sheet has a heat-activatable sealing...
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4952777 |
Electric heat-sealing heater having a flexible heat accumulating sealing surface
An electric heat-sealing heater has a flat heating sheet member having embedded therein a resistance heating element. The sheet member is supported on a rigid guide with an elastic rubber sheet...
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4948435 |
Method for inhibiting stress corrosion cracking
Method and apparatus for inhibiting stress corrosion cracking adjacent weldments in steel workpieces such as stainless steel pipe through generation of a controllable throughwall temperature...
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4947012 |
Electrofusion marker
An electrofusion marker which fuses two pipe sections together and acts as a passive electronic marker. The electrofusion marker includes a tubular thermoplastic fitting having a coil therein,...
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4944987 |
Heat recoverable articles
The invention relates to a heat-recoverable covers which comprises embedded electrical resistance heaters, and to methods of covering an elongate object using such covers. In a preferred...
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4943706 |
Method and apparatus for fusing thermoplastic materials
An apparatus and method for attaining fusion temperature at substantially the same time throughout an interface between thermoplastic articles by the controlled application of heat. The method...
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4942287 |
Linoleum roll heater assembly
A linoleum roll heater assembly for heating a roll of linoleum while in storage or at a job site located at a cold weather environment. The heater assembly includes a heater tube to be received...
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4937433 |
Electrical heating unit for sealing vacuum electron tubes
The heating unit for sealing vacuum electron tubes of the type having a glass stem, a glass exhaust tubulation extending from the stem and a plurality of electrically-conducting leads extending...
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4937435 |
Flexible electric heating pad using PTC ceramic thermistor chip heating elements
A flexible electric heating pad has a plurality of positive temperature coefficient (PTC) ceramic thermistor chip heating elements arranged in a two dimensional array between first and second...
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4931116 |
Heat-recoverable coupler
A coupler for joining polymeric pipes comprises a generally cylindrical radially heat-shrinkable member which is composed of a conductive polymer. To recover the coupler, current is passed axially...
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4927999 |
Apparatus for fusion joining plastic pipe
Apparatus for fusion joining first and second axially abutted thermo-plastic piping system component connection ends that are in axial and circumferential alignment including apparatus for enabling...
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4927993 |
Locking cylinder heating
A device is disclosed for preventing freezing of locking cylinders, which includes a heat conductive body member with an incandescent bulb removably mounted within an open-top internal recess. A...
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4921648 |
Method of joining an article comprising a conductive polymer composition to a polymeric substrate
A method of joining a substrate, particularly a polymeric pipe for transporting fluids, e.g. natural gas and water, to an article which is not heat-recoverable and which comprises a conductive...
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4918292 |
Process and machine for the welding together of plastic parts processing a built-in winding
The invention relates to the automatic welding of plastic parts possessing a built-in winding. In order to carry out an automatic welding operation without risking damaging the parts by subjecting...
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4912303 |
Electric heating belt for liquid propane bottles
An electric heating device for warming liquid propane gas (LPG) bottles includes a flexible heat resistant belt adapted to be secured around the outer peripheral surface of the bottle. The belt has...
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4908501 |
Portable electrically heated animal drinking water container
A heated water vessel for providing drinking water for animals is provided which has a first exterior rubber container and a second rubber interior container wherein the second container is nested...
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4906313 |
Fusion weld method and assembly for forming a fusion welded joint between pipe sections
A fusion weld method and assembly for forming a fusion welded joint between abutting pipe sections having the same exterior diameter and having a predetermined melting temperature. The assembly...
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4894521 |
Electric heating element for fusing thermoplastic materials
An electric heating element for electrically fusing thermoplastic materials. The heating element comprises an elongated thermoplastic insulated wire wound in a spiral configuration with adjacent...
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4891500 |
Self-healing parallel heating tape
A parallel circuit heating tape (13) of the kind comprising two electrical power conductors (12,15) with low resistance relatively thin heating elements (16) between them which dissipate heat, the...
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4882470 |
Boring device for opening passages to branch portions of a lined main pipe line
A boring device for a lining material in a branched portion of a lined pipe such as a gas-conduit or a city water pipe line to which the lining material has been applied, which device includes a...
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4879454 |
Fiber optic fabrication furnace
An electric furnace for fusing optical fibers has a body made of insulating material. A fiber channel is provided wherein the fibers to be fused are positioned. To facilitate the insertion of the...
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4866252 |
Heat-recoverable article
A heat-recoverable article for bonding to an object, particularly for sealing a joint between pre-insulated pipes, consists of a layer of heat-recoverable polymeric material, a layer of a bonding...
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4865674 |
Method of connecting two thermoplastic pipes using a barbed metal welding sleeve
A method of connecting two thermoplastic pipes and joint resulting therefrom which includes an electrically conductive insert sleeve with radially extending barbs alternately projecting to the...
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4855574 |
Welding sleeve with connecting means having an upper and lower part
Welding sleeve comprising electrically conductive material embedded in the thermoplastic material of the wall of said sleeve. In a sleeve at least two connecting means are present which each...
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4852914 |
Plastic pipeline having rapidly fusible joints and method of making same
A polyethylene pipeline including a plurality of prefabricated pipes of predetermined diameter fused on one end to respective bell fittings to form prefabricated bell and spigot pipe assemblies....
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