Cooper Power Systems, Inc.

Cooper Industries, Inc.

Mcgraw-edison Company

Lawrence M Burrage

John F Baranowski

Gary L Goedde

James V White

Lawrence G Wilson

Daniel James Schreiber

David W Anderson

Jacques P Guertin

J Howard Shaw

James R Marek

Charles Guenette

Hugo H Wuerker

George E Adair

Andrew J Orgovan

Raymond Raketti

Daniel J Schreiber

An apparatus for magnetic annealing of amorphous metal alloy cores. The apparatus includes a fluidized bed for heating the core, a conveyor for transporting the core and immersing the core in the fluidized bed and at least one winding for applying a magnetic field to the core. The apparatus can include a chill bath and/or a second fluidized bed for cooling the core. A chamber can be provided between the two fluidized beds for slow cooling the core by convection and radiation prior to cooling the core at a faster rate in the second fluidized bed.

Apparatus for annealing/magnetic annealing amorphous metal in a

A method of heat treating an amorphous metal alloy by immersing the alloy in a fluidized bed to heat the alloy to a temperature below its recrystallization temperature. The alloy is maintained in the fluidized bed for a time sufficient to reduce internal stresses While minimizing crystal growth and nucleation of crystallites in the alloy. Then, the alloy is removed from the fluidized bed and cooled. A magnetic field can be applied to the alloy before, during or after heating the alloy in the fluidized bed. The magnetic field is applied for a time sufficient to achieve substantial magnetic domain alignment while minimizing crystal growth and nucleation of crystallites in the alloy. The cooling step is effective to maintain the magnetic domain alignment in the alloy. The cooling step can be performed with a chill bath or a fluidized bed which is cooled by a circulating gas such as nitrogen or air. The alloy can be slowly cooled by convection and radiation after it is removed from the first fluidized bed. An apparatus for magnetic annealing of amorphous metal alloy cores. The apparatus includes a fluidized bed for heating the core, a conveyor for transporting the core and immersing the core in the fluidized bed and at least one winding for applying a magnetic field to the core. The apparatus can include a chill bath and/or a second fluidized bed for cooling the core. A chamber can be provided between the two fluidized beds for slow cooling the core by convection and radiation prior to cooling the core at a faster rate in the second fluidized bed.

A transformer core of non-circular cross-section, preferably rectilinear, is formed by successively wrapping individual packets of core strips around a stationary mandrel of non-circular cross-section. Each packet is wrapped by a pair of yieldably biased rollers which follow the contour of the mandrel. As the packet is being wrapped, pressure pads are extended to hold the packet against the mandrel. The pressure pads are momentarily retracted to accommodate return movement of the roller wipers to receive a subsequent packet. The ends of the packet form a joint at the top of the mandrel. The positions of successive packets can be changed to vary the location of the joint in order to form a desired joint pattern.

Apparatus for making a transformer core of non-circular cross-section

Angled bushing

A method of heat treating an amorphous metal alloy by immersing the alloy in a fluidized bed to heat the alloy to a temperature below its recrystallization temperature. The alloy is maintained in the fluidized bed for a time sufficient to reduce internal stresses while minimizing crystal growth and nucleation of crystallites in the alloy. Then, the alloy is removed from the fluidized bed and cooled. A magnetic field can be applied to the alloy before, during or after heating the alloy in the fluidized bed. The magnetic field is applied for a time sufficient to achieve substantial magnetic domain alignment while minimizing crystal growth and nucleation of crystallites in the alloy. The cooling step is effective to maintain the magnetic domain alignment in the alloy. The cooling step can be performed with a chill bath or a fluidized bed which is cooled by a circulating gas such as nitrogen or air. The alloy can be slowly cooled by convection and radiation after it is removed from the first fluidized bed.

Method of annealing/magnetic annealing of amorphous metal in a fluidized

A flipper is described for a fuse of the type having a generally cylindrical fuse tube, a fusible element within the tube and a fuse leader, the fuse leader having two ends with one of the ends connected to the fusible element disposed within the tube and with the other end of the leader adapted to be connected to a fixed terminal such as one of the two terminals of a power factor capacitor. In one embodiment, the flipper has two elongated arms disposed adjacent one another, a helical torsion spring at one end of each arm, an eyelet connecting together the other end of the arms and adapted to pass through the fuse leader, and a hook or similar connection carried by the springs to mount the flipper assembly to the associated terminal to which the free end of the fuse leader is joined. The flipper assists in the extraction of the leader from the fuse tube and provides positive restraint of the leader after the fuse has blown. Several specific embodiments are described wherein the lateral displacement of the torsion springs is controlled, the lateral displacement of the leader arms is varied, and the angular relationship between the flipper arms and the terminal connection is changed.

Capacitor fuse leader flipper

A high voltage feed-through bushing has a conductive gasket to connect a conductive coating to a metal enclosure. A central conductor rod of the bushing is surrounded by an insulating tube which is surrounded by a tubular conductor to establish a floating equipotential surface. The central conductor rod is located within a bushing shell by sealing means at the outer and inner ends of the bushing.

Electrical assembly including a metal enclosure and a high voltage

A unique design and method of construction is presented for a tank-like structure which houses an electrical component immersed within a dielectric fluid. The tank is formed by a generally cup-shaped enclosure and a cover. In one embodiment the cover carries a means for electrically connecting the interior of the tank with its exterior. The cover and the enclosure are joined by an overlapping edge means. By overlapping the marginal portions of the cover and the enclosure, such that the leading edges are disposed in the opposite direction, a joint is formed which is less likely to rupture than one formed by overlapping the marginal portions with the leading edges disposed in the same direction. The overlapping edge means, allows the designer to pre-select that portion of the interface between the cover and the enclosure where, in the event of an overpressure condition within the tank, a rupture should preferably occur, thereby minimizing the damage which could result from the discharge of pressurized gas and liquid. The tank design also includes provision for a retention means to hold the solid portions of the electrical apparatus housed by the tank within the tank in the event that the tank ruptures and fluid is lost. Several specific embodiments are illustrated and described in detail, with specific reference to a tank which houses a plurality of capacitor packs.

Dielectric fluid tank

Compact bodies for use as contacts in vacuum current interrupters, plasma devices and the like are formed by a vacuum hot press fabrication of suitable powder material. The contacts which may be formed as a button or ring, are operable under high current arcing conditions. The powder material is mixed and placed between a pair of rams in a floating die cavity maintained in an inert atmosphere and is placed in a vacuum chamber. A vacuum is created without pressurizing the powder material. The powder material is heated to below its melting temperature for degassing. The die cavity preferably includes special outgassing ports. The rams are pressurized and the powder material reaches a sintering temperature and a vacuum of 3.times.10.sup.-6 torr. A uniform composition compact body essentially devoid of trapped gas and particularly suitable for use as a high current interrupting contact in an arcing environment results. Interrupter contacts of copper with hundreds of ppm of oxygen (cupric or cuprous) may be formed. Powder material of a non-carbide-forming metal or alloy may be mechanically bonded to a porous graphite element as a result of the process. A weak joint between the powder material, and a porous graphite element may also be created by interposing an anti-bonding graphite powder layer therebetween.

Method and apparatus for forming compact bodies from conductive and

A brazed slip joint is formed between housing portions, the portions forming an envelope to enclose an evacuated area. The ends of the housing portions overlap, one within the other, and each has a slight outward flare. The edge of the inner end makes line contact with the inner surface of the outer end. This arrangement defines an area between the overlapping ends which comes substantially to a point at that line contact and which is generally triangular in transverse cross section. That area is filled with a brazing alloy and a brazed joint is formed by exposure of the parts to the proper elevated temperature.

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South Milwaukee, WI, United States of America

Lawrence M Burrage