Abstract: An ignition system for igniting fuel in a gas turbine or diesel engine is described. The system includes a magnetic core-coil assembly having a magnetic core comprising at least one tape wound toroid of ferromagnetic amorphous metal alloy, a primary winding and a secondary winding. Also included are driver electronics for applying voltage to a spark plug to cause a spark to ignite the fuel. The core-coil assembly and driver electronics are capable of operating with a rapid charge and discharge cycle to produce a high spark pulse rate. In another aspect, a magnetic core-coil assembly is disclosed which has a magnetic core comprising at least one tape wound toroid of ferromagnetic amorphous metal alloy having a permeability ranging from about 250 to 500, a primary winding for low voltage excitation and a secondary winding for high voltage output.

Abstract: A bulk amorphous metal magnetic component has a plurality of laminations of ferromagnetic amorphous metal strips adhered together to form a generally three-dimensional part having the shape of a polyhedron. The component is formed by stamping, stacking and bonding. The bulk amorphous metal magnetic component may include an arcuate surface, and an implementation may include two arcuate surfaces that are disposed opposite each other. The magnetic component may be operable at frequencies ranging from between approximately 50 Hz and 20,000 Hz. When the component is excited at an excitation frequency “f” to a peak induction level Bmax, it may exhibit a core-loss less than “L” wherein L is given by the formula L=0.0074 f (Bmax)1.3+0.000282 f1.5 (Bmax)2.4, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.

Abstract: A bulk amorphous metal magnetic component has a plurality of laminations of ferromagnetic amorphous metal strips adhered together to form a generally three-dimensional part having the shape of a polyhedron. The component is formed by stamping, stacking and bonding. The bulk amorphous metal magnetic component may include an arcuate surface, and an implementation may include two arcuate surfaces that are disposed opposite each other. The magnetic component may be operable at frequencies ranging from between approximately 50 Hz and 20,000 Hz. When the component is excited at an excitation frequency “f” to a peak induction level Bmax, it may exhibit a core-loss less than “L” wherein L is given by the formula L=0.0074 f(Bmax)1.3+0.000282 f1.5(Bmax)2.4, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.

Abstract: An ignition system for igniting fuel in a gas turbine or diesel engine is described. The system includes a magnetic core-coil assembly having a magnetic core comprising at least one tape wound toroid of ferromagnetic amorphous metal alloy, a primary winding and a secondary winding. Also included are driver electronics for applying voltage to a spark plug to cause a spark to ignite the fuel. The core-coil assembly and driver electronics are capable of operating with a rapid charge and discharge cycle to produce a high spark pulse rate. In another aspect, a magnetic core-coil assembly is disclosed which has a magnetic core comprising at least one tape wound toroid of ferromagnetic amorphous metal alloy having a permeability ranging from about 250 to 500, a primary winding for low voltage excitation and a secondary winding for high voltage output.

Abstract: An ignition system for igniting fuel in a gas turbine or diesel engine is described. The system includes a magnetic core-coil assembly having a magnetic core comprising at least one tape wound toroid of ferromagnetic amorphous metal alloy, a primary winding and a secondary winding. Also included are driver electronics for applying voltage to a spark plug to cause a spark to ignite the fuel. The core-coil assembly and driver electronics are capable of operating with a rapid charge and discharge cycle to produce a high spark pulse rate. In another aspect, a magnetic core-coil assembly is disclosed which has a magnetic core comprising at least one tape wound toroid of ferromagnetic amorphous metal alloy having a permeability ranging from about 250 to 500, a primary winding for low voltage excitation and a secondary winding for high voltage output.

Abstract: A bulk amorphous metal magnetic component for an electric machine such as a motor or generator is described. The component may include a plurality of substantially similarly shaped laminations stamped from ferromagnetic amorphous metal strips, stacked and bonded together in registry, wherein the laminations include a plurality of tooth-shaped sections. In an alternate implementation, the component may be constructed by first stacking a plurality of layers of amorphous metal strips, laminating the layers and then cutting the object to form the component. The bulk amorphous metal magnetic component when operated at an excitation frequency “f” to a peak induction level Bmax has a core-loss less than “L” wherein L is given by the formula L=0.0074 f (Bmax)1.3+0.000282 f1.5 (Bmax)2.4, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.

Abstract: A spark ignition system for igniting fuel in an internal combustion engine is described. The spark ignition system includes a magnetic core-coil assembly having a ferromagnetic amorphous metal magnetic core and driver electronics. The core-coil assembly and driver electronics are capable of operating with a rapid charge and discharge cycle to produce a high spark pulse rate.

Abstract: A bulk amorphous metal magnetic component has a plurality of laminations of ferromagnetic amorphous metal strips adhered together to form a generally three-dimensional part having the shape of a polyhedron. The component is formed by stamping, stacking and bonding. The bulk amorphous metal magnetic component may include an arcuate surface, and an implementation may include two arcuate surfaces that are disposed opposite each other. The magnetic component may be operable at frequencies ranging from between approximately 50 Hz and 20,000 Hz. When the component is excited at an excitation frequency “f” to a peak induction level Bmax, it may exhibit a core-loss less than “L” wherein L is given by the formula L=0.0074 f (Bmax)1.3 +0.000282 f1.5 (Bmax)2.4, said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.

Abstract: A rapidly solidified amorphous metallic alloy is composed of iron, boron, silicon and carbon. The alloy exhibits in combination high saturation induction, high Curie temperature, high crystallization temperature, low core loss and low exciting power at line frequencies and is particularly suited for use in cores of transformers for an electrical power distribution network.

Abstract: Torque in a shaft is measured by a torque sensor comprising at least one strain gage. The strain gage has a magnetic circuit comprising a magnetostrictive, soft ferromagnetic element. A drive mechanism applies a first and a second magnetomotive force to the magnetic circuit. The second magnetomotive force has a sense opposite that of the first magnetomotive force. A sensing mechanism senses the state of magnetization of the ferromagnetic element and a detecting mechanism determines the magnitude of that magnetic field applied to the ferromagnetic element by the second magnetomotive force which reduces the magnetization of the element to zero. Torque is derived from the strain indicated by a change in the coercive field of the ferromagnetic element.

Abstract: Strain within a substrate is measured by attaching thereto a magnetic circuit comprising a magnetostrictive, soft ferromagnetic element, and sensing a change in the coercive field of the element caused by strain therewith.

Abstract: A method and apparatus are provided for monitoring in situ the transformation of some fraction of a starting material to another material during the course of a thermal treatment. The starting material is heated to a preselected temperature and its resistivity is measured. A signal is transmitted to an actuator, which indicates cooling of the material when a preselected resistivity or change therein is detected.

Abstract: A rotor assembly comprises a high energy product permanent magnet contained within a sheath and metallurgically bonded thereto. The metallurgical bond imparts mechanical strength to the magnet, thereby preventing crack propagation therewithin during operation of the rotor assembly, and minimizes the thermal barrier to the transfer of heat from the magnet to the sheath.

Abstract: Metallic glasses having high permeability, low magnetostriction, low coercivity, low ac core loss, low exciting power and high thermal stability are disclosed. The metallic glasses consist essentially of a composition defined by the formula Fe.sub.a M.sub.b B.sub.c Si.sub.d C.sub.e in which "a"-"e" are in atom percent, the sum ("a"+"b"+"c"+"d"+"e") equals 100, M is at least one element selected from the group consisting of Mo, Cr, Ti, Zr, Hf, Nb, Ta, V and W, "a" ranges from about 66 to 81.5, "b" ranges from about 0.5 to 6, "c" ranges from about 10 to 26, "d" ranges from about 1 to 12, "e" ranges from about 0 to 2 and the sum ("c"+"d"+"e") ranges from about 18 to 28, and have been annealed at a temperature, T.sub.a, for a time, t.sub.a, sufficient to induce precipitation of discrete particles therein. Such metallic glasses are suitable for use in tape recorder heads, relay cores, transformers and the like.

Abstract: Metallic glasses having high permeability, low coercivity, low ac core loss, low exciting power, and high thermal stability are disclosed. The metallic glasses are substantially completely glassy and consist essentially of about 58 to 81 atom percent iron, from 1 to about 10 atom percent of at least one member selected from the group consisting of nickel and cobalt, about 1 to 6 atom percent of at least one member selected from the group consisting of chromium, molybdenum, vanadium, niobium, and zirconium, about 11 to 27.5 atom percent boron about 0.5 to 8 atom percent silicon, 0 to about 2 atom percent carbon, plus incidental impurities, the total of born, silicon and carbon present ranging from about 17 to 28 atom percent. The alloy is heat treated at a temperature and for a time sufficient to achieve stress relief without inducing precipitation of discrete particles therein.

Abstract: A method and apparatus are provided for monitoring in situ the transformation of some fraction of a starting material to another material during the course of a thermal treatment. The starting material is heated to a preselected temperature and its permeability is measured. A signal is transmitted to an actuator, which indicates cooling of the material when a preselected or change therein is detected.