Abstract: A method of cooling induction-heated vapor deposition apparatus including an electrically grounded deposition enclosure and a RF induction heating coil having essentially electrically uninsulated turns thereof disposed about the deposition enclosure, comprises the step of spraying deionized liquid having a resistivity of at least 14 megohms-om directly onto the apparatus.

Abstract: For optimizing the manufacturing cost of the magnetic torus of a differential transformer, the volume is reduced in that the free volume of the central aperture is fully filled: only one turn for each primary conductor, the section of which is reduced, the adjacent parts of larger section forming heat sinks, the central part of the conductors having the form of circular sectors. An important saving is secured on the most expensive part of the relay.

Abstract: A three legged transformer in which the legs are all of the same height and in which the primary winding is divided into two parts, one of the parts being wound upon one of the legs and the other part being wound upon another leg, and in which the secondary winding is wound upon the third leg.

Abstract: A bubble memory package is comprised of a nonmagnetizable heat sink formed with a pocket for receiving the field coil and magnetic chip carrier assemblies. The heat sink is massive and capable of dissipating the heat generated by a high density memory operating at a high frequency. The heat sink is not closed over the top of the coil and memory carrier assemblies to reduce eddy and circulating electrical currents formed in an electrically conductive heat sink. The heat sink is formed with a track guide for receiving a heat sink plate which may be of electrically nonconductive material but which has sufficient heat conductivity to assist in transferring heat into the heat sink. The top of the heat sink plate is formed with a pocket for receiving a permanent magnet to generate the bias field and the bottom of the heat sink is formed with a second pocket for receiving a magnet assembly. The entire package is surrounded by a magnetic shield container.

Abstract: A heat storage system provides overload capacity for a vaporization-cooled electrical apparatus. An external housing, containing a heat storage fluid, is disposed around a fluid conductor connecting a non-condensable gas storage reservoir and the radiator of a vaporization-cooled electrical apparatus. At normal loads, the non-condensable gas is contained within the fluid conductor and the storage reservoir thereby thermally isolating the storage fluid from the hot vapors contained within a radiator which keeps the storage fluid at ambient temperatures. A pressure increase, caused by an overload, compresses the non-condensable gas into the storage reservoir and allows the hot vapors to flow into a portion of the fluid conductor surrounded by the external housing whereby heat is dissipated from the hot vapors to the storage fluid contained within the external housing.

Abstract: The rod-shaped core portion carrying the high-voltage secondary winding is separated from the U-shaped core portion carrying the primary winding by an insulating partition integral with an insulating casing that both provides galvanic separation between the primary and secondary parts of the transformer and also defines the so-called air gaps of the core.

Abstract: Especially simple structure for an electrical transformer device provides cost effective fabrication thereof and offers improved operating performance particularly in a radio transmitter circuit for coupling high levels of radio frequency energy from the output of a radio frequency amplifier to an antenna system. One winding of the transformer is formed from a single, unitary, tubular member arranged into a U-shaped configuration which includes a pair of spaced sets of openings therein for the two-fold purpose of allowing efficient threading of a secondary winding therewithin and to improve air cooling characteristics of the device. A second winding comprises a wire passed through the interior of the tubular member, and a number of cylindrically shaped magnetic elements are sleeved over the tubular member to enhance the mutual inductive coupling between the windings.

Abstract: A thin wall, stainless steel transformer case of rectangular box configuration is comprised of edge welded steel plates with its sidewalls and end walls bearing vertical, U-shaped bonded channel members of copper for mechanical reinforcement of the case and for forming transformer heat dissipating fins. Stainless steel reinforcing channel members are similarly bonded to the outside of the case bottom wall and the cover. An epoxy fiberglass strap spanning interiorly between the sidewalls of the case at its upper end and bolted to opposed brackets press the transformer core against the bottom wall of the transformer case. A pair of deformable tubes sealably project through the cover for effecting vacuum evacuation of the interior with the cover sealed to the case and for feeding insulating dielectric liquid to the transformer case interior. The tubes are pinched off and sealed after filling.

Abstract: A ballast can be mechanically and thermally isolated from the mounting plate which acts as a heat sink by securing a pair of L-shaped channels to the bottom of the ballast with the depending leg of each channel being disposed in intimate sliding engagement with the flat surface of a respective C-shaped channel member which is secured to the mounting plate. Vibration damping washers are disposed between the L-shaped channel member and the C-shaped channel member to prevent vibrations from being transmitted from the ballast to the base while still permitting heat dissipation through the superimposed sliding surfaces of the channels.

Abstract: A transformer is disclosed in which an insulating material having a thermal conductivity higher than 10.sup.-3 cal/cm.sec..degree. C is interposed between a coil and a core so that transfer of heat generated in the coil to the core may be attained at a higher rate and consequently efficient heat dissipation may be effected. The diameters of conductors used may be reduced so that a transformer compact in size and light in weight may be provided.

Abstract: A low cost magnetic circuit and method of making the same are disclosed. The magnetic circuit comprises an integral magnetic core having at least four legs in a closed magnetic path, at least one leg thereof with a circular cross section and a bobbin rotatably disposed about the circular portion for containing a coil winding. The coil is formed by rotating the bobbin while holding the core stationary.

Abstract: A hermetically sealed vaporization chamber contains a vaporization cooled transformer to be cooled while dielectrically protected and two phase dielectric fluid comprising a liquid and a vapor. The transformer includes a plurality of cooling ducts extending vertically therethrough. The liquid, which resides at a bottom portion of the chamber and has a liquid level above the bottom of the chamber, is also distributed as a film which coats the top and the wall surfaces of the vertical ducts. A distribution pan with an outer rim is positioned above the transformer for receiving liquid condensate from said condenser. The rim portion of the distribution pan is provided with a plurality of apertures to distribute the liquid condensate uniformly as a film over the wall surfaces of the associated vertical ducts. At least one condensate make-up pump is provided for pumping liquid from the bottom portion of the chamber to the distribution pan.

Abstract: The invention relates to a method of manufacturing an inductive stabilizing ballast for a gas and/or vapor discharge lamp.According to the invention, after placing the laminations in and about the coil, part of each lamination is turned about an axis which is parallel to the center line of the electric coil so that the lamination parts are tightly turned against the electric coil. This leads to a satisfactory thermal contact between the coil and the casing so that the removal of heat from the coil is enhanced.

Abstract: An electromagnet is disclosed. The electromagnet has a winding that is wet wound with an epoxy material filled with grains of a material having a high coefficient of thermal-conductivity. The entire winding is empotted dry in a similar epoxy having grains of the said material. Fins are connected to the outside of the dry empotment for carrying away heat transferred to the fins from the coil.

Abstract: An electrical apparatus, such as a distribution transformer, having heat pipe cooling. The transformer is provided with a cover in the form of a heat pipe with an evaporator section extending from the cover into the dielectric fluid of the transformer. The top of the cover forms the condenser section of the heat pipe.

Abstract: A power source for supplying stabilized current to electro-technological installations, comprising an induction-capacitance stabilizer with a power transformer and a short-length circuit comprised of a stationary bus conductor connected via flexible sections to an electro-technological installation, the primary winding of the transformer being uniformly distributed along the whole stationary bus conductor, embracing the latter cross-sectionwise, the stationary bus conductor being the secondary winding of the transformer.

Abstract: A pole coil wherein improved heat transfer at cooling fins thereof is achieved and includes cooling fins which are subdivided in the longitudinal direction into short portions which are bent out so that they are disaligned with each other. The pole coil is suitable for electrical machines and apparatus and especially for the revolving excitation windings of synchronous electric machines.

Abstract: A system for utilizing electrical energy to induce eddy currents in an electrically conductive article, e.g., the metallic member of a hot melt type fastener. An ultrasonic frequency generator circuit utilizing a single SCR and having a maximum power output of about 1 kilowatt includes in circuit therewith a coupling coil for providing directly a high concentrated magnetic field which induces eddy currents in the electrically conductive article for rapid heating.

Abstract: The invention relates to a method of manufacturing an inductive stabilizing ballast for a gas and/or vapour discharge lamp.According to the invention, after placing the laminations in and about the coil, part of each lamination is turned about an axis which is parallel to the centre line of the electric coil so that the lamination parts are tightly turned against the electric coil. This leads to a satisfactory thermal contact between the coil and the casing so that the removal of heat from the coil is enhanced.