Abstract: Active snubber structure and method for use with an electronic power inverter to reduce turn off losses in electronic switches in the power inverter. The snubber structure includes a resistor and a capacitor connected in series with each other and in parallel with the load on the power inverter and parallel, inverse connected silicon controlled rectifiers connected in parallel with the resistor for selectively shorting the resistor.

Abstract: Structure for and a method of resistance welding using an induction coupled power source. The structure of the invention comprises an electric coil wrapped around a flux concentrating core in close proximity to members to be welded together, a source of alternating electrical energy connected through the coil and means for applying pressure between the members to be welded. In accordance with the method of the invention the members to be welded are heated by at least one of an induced current and hysteresis loss and the heated members are then forged together by applying pressure thereon. The weld effected by the method of the invention may be either a spot weld or a continuous weld. Further in accordance with the structure of the invention the flux concentrating core may be on one or both sides of the materials to be welded and may be linear and perpendicular or at an angle to the members to be welded, or may be U-shaped or cup-shaped including a central post around which the coil is wrapped.

Abstract: Wire separator structure and method for separating spark plug wires and the like. The structure includes a body member having a plurality of cylindrical openings therethrough including parallel transversely spaced apart axes of generation in the same plane, and a slot extending across the plane and parallel to the cylindrical openings have dovetail portions on both sides of the plane which body member is split in the plane of the axes of the cylindrical openings therethrough to provide separate body parts and a generally X-shaped wedge member positioned within the slot in the body member to hold the parts of the body member together with the wires to be separated within the cylindrical openings in the body member. In the method of the invention, wires to be separated are placed in cylindrical openings in a split body member and the parts of the split body member are secured together by an X-shaped wedge member extending axially of the cylindrical openings into dovetail slots in the body parts.

Abstract: A building structure comprising a core unit including bathroom and kitchen facilities and a plurality of entrance and exit openings and a plurality of other separate building units having entrance and exit openings therein positioned adjacent the core unit and in communication therewith and with each other through aligned entrance and exit openings, separately constructed at a remote location and secured together in vertically adjusted level position at the building site. The invention further includes the method of constructing the building structure including the steps of constructing the separate core and other building units at a remote location, transporting them to a building site, locating them on foundation structures, vertically adjusting the individual structures and securing them together and subsequently adding additional other separate building units to expand the building structure.

Abstract: A method of and structure for high speed seam welding. The method comprises placing an auxiliary transformer between a three phase source of electrical welding energy and seam welder structure, which auxiliary transformer includes three separate primary windings connected to the separate phases of the source of welding energy, phase controlling the energizing of each separate primary winding and energizing the seam welder from the auxiliary transformer. In one embodiment, the phases of the auxiliary transformer are energized in the order of the phase of the welding energy and a delay of approximately 120.degree. of the welding energy is provided between the energizing of each auxiliary transformer winding. In another embodiment of the invention, the auxiliary transformer primary windings are energized in a first, third, second, welding energy phase order with a delay of 240.degree.

Abstract: A stabilized fill material and method of producing the stabilized fill material comprising approximately 45-80% fly ash, 1-6% cement, and 20-50% water by weight, and mixing the material and depositing it directly in water by equipment supported on previously deposited fill material to form a causeway or the like. The fill material may include up to 2% lime by weight.