Patents Assigned to Marelco Power Systems, Inc.
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Patent number: 5754034Abstract: An apparatus for providing an electrically controllable inductor which uses a first and a second magnetic core (20, 24) spaced apart from one another. A DC bias coil (22) is wound on the first magnetic core (20). An inductor coil (26) is wound on both the first magnetic core (20) and the second magnetic core (24). The inductance seen at terminal connections (80, 82) of the inductor coil (26) is variable in dependence upon a magnitude of a flow of direct current through the DC bias coil (22). In one embodiment of the inductor, the first and the second magnetic core (20, 24) are each formed using a pair of U-shaped core segments (30, 32, 60, 62) located adjacent to one another. In this embodiment, the first and second magnetic core (20, 24) are located in an opposing relation to one another, with the DC bias coil (22) wound on inner legs (64, 72) of the first magnetic core (20) and the inductor coil (26) wound on inner legs (64, 72, 34, 44) of both the first and the second magnetic core (20, 24).Type: GrantFiled: June 4, 1996Date of Patent: May 19, 1998Assignee: Marelco Power Systems, Inc.Inventors: David Ratliff, Peter H. Burgher, John Boomer
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Patent number: 5523673Abstract: An apparatus for providing an electrically controllable inductor uses a first and a second magnetic core (20, 24) spaced apart from one another. A DC bias coil (22) is wound on the first magnetic core (20). An inductor coil (26) is wound on both the first magnetic core (20) and the second magnetic core (24). The inductance seen at terminal connections (80, 82) of the inductor coil (26) is variable in dependence upon a magnitude of a flow of direct current through the DC bias coil (22). In one embodiment of the inductor, the first and the second magnetic core (20, 24) are each formed using a pair of U-shaped core segments (30, 32, 60, 62) located adjacent to one another. In this embodiment, the first and second magnetic core (20, 24) are located in an opposing relation to one another, with the DC bias coil (22) wound on inner legs (64, 72) of the first magnetic core (20) and the inductor coil (26) wound on inner legs (64, 72, 34, 44) of both the first and the second magnetic core (20, 24).Type: GrantFiled: March 4, 1994Date of Patent: June 4, 1996Assignee: Marelco Power Systems, Inc.Inventors: David Ratliff, Peter H. Burgher, John Boomer
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Patent number: 5051867Abstract: A transformer assembly (10) for use as a self-contained auxiliary power supply in complex machine tool applications is disclosed as having a core (16) with a first side (18) and a second side (20). Attached to the first side (18) of the core (16) is a first hollow housing (30). A second hollow housing (34) is attached to the second side (20) of the core (16). The core (16) has lateral side edges (28) extending between the first and second sides (18, 20) thereof for effective removal and dissipation of heat generated by the transformer assembly (10). A plurality of electrical components (38) are mounted at least partially within one or more of the hollow housings (30, 34) to provide compact accommodation of the electrical components (38) by the transformer assembly (10) so that the latter occupies a minimal volume within a control panel in the complex machine tool. Accordingly, the assembly so described is significantly smaller and less costly than conventional auxiliary power supplies.Type: GrantFiled: June 19, 1990Date of Patent: September 24, 1991Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, John Boomer
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Patent number: 4956745Abstract: A transformer assembly (10) for use as a self-contained auxiliary power supply in complex machine tool applications is disclosed as having a core (16) with a first side (18) and a second side (20). Attached to the first side (18) of the core (16) is a first hollow housing (30). A second hollow housing (34) is attached to the second side (20) of the core (16). The core (16) has lateral side edges (28) extending between the first (18) and second sides (20) thereof for effective removal and dissipation of heat generated by the transformer assembly (10). A plurality of electrical components (38) are mounted at least partially within one or more of the hollow housing (30, 34) to provide compact accommodation of the electrical components (38) by the transformer assembly (10) so that the latter occupies a minimal volume within a control panel in the complex machine tool. Accordingly, the assembly so described is significantly smaller and less costly than conventional auxiliary power supplies.Type: GrantFiled: May 10, 1989Date of Patent: September 11, 1990Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, Richard L. Holmes, John Boomer
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Patent number: 4703158Abstract: A high frequency resistance welding system having a pair of jaws which are pivotally mounted together and are adapted to clampingly engage the work to be welded therebetween. Each jaw has two arms and each arm has a welding tip which engages the work. The welding tips on the arms on one jaw register with the welding tips on the arms on the other jaw. A high frequency alternating electric power source is connected to the first jaw so that the direction of current flow in one arm of the first jaw is opposite from the direction of current flow in the other arm of the first jaw so that the magnetic field caused by the current flow through one arm is substantially offset or cancelled by the current flow through the other arm of the first jaw. In addition, each welding arm is preferably L-shaped thus having an elongated shank with the welding tip at one end of the shank.Type: GrantFiled: March 31, 1986Date of Patent: October 27, 1987Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, John Boomer
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Patent number: 4577085Abstract: A transformer system for resistance welding intended for installation on robotic devices comprises an auto transformer having a tap selection switch connected through electrical conductors to an isolation welding transformer located at the end of the robotic arm. The auto transformer is uniquely selected for the maximum efficiency thereof and the optimum reduction in the size of the conductors between the transformers. The isolation welding transformer is also optimally sized due to the reduction permissable by the previous interposition of the auto transformer in the welding system. Moreover, the isolation welding transformer comprises primary and secondary coils formed from tubular members each of which is cooled by a fluid coolant. Utilization of refrigerated coolant permits further reduction in size and mass, and increases electrical efficiency because of the unique design of the isolation welding transformer in which both primary and secondary windings are cooled by such fluid coolant.Type: GrantFiled: January 20, 1984Date of Patent: March 18, 1986Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, John L. Boomer
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Patent number: 4496821Abstract: A transformer for electric welders, especially welders having a welding gun secured to a robot arm, comprises a small lightweight loop core having first and second substantially C-shaped sections abutted together at their free ends with primary and secondary windings coaxially wrapped about one pair of abutting shanks. The secondary winding comprises an elongated flat sheet wrapped around abutting shanks of the core and has projecting tabs extending from opposite sides of the sheet. A primary winding comprising a plurality of coil sections is coaxially wrapped about the secondary winding whereby the secondary winding is substantially entirely coupled to the primary winding. The windings are encapsulated in a dielectric material such as a synthetic polymer resin. The transformer is preferably connected to a high frequency electrical power source.Type: GrantFiled: August 6, 1982Date of Patent: January 29, 1985Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, Raymond F. Marsden
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Patent number: D290456Type: GrantFiled: October 2, 1984Date of Patent: June 23, 1987Assignee: Marelco Power Systems, Inc.Inventors: Peter Burgher, John Boomer
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Patent number: D297829Type: GrantFiled: May 20, 1985Date of Patent: September 27, 1988Assignee: Marelco Power Systems, Inc.Inventors: Peter Burgher, Richard Holmes, John Boomer
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Patent number: D314367Type: GrantFiled: January 4, 1989Date of Patent: February 5, 1991Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, Richard L. Holmes, John Boomer
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Patent number: D334732Type: GrantFiled: May 18, 1989Date of Patent: April 13, 1993Assignee: Marelco Power Systems, Inc.Inventors: Peter H. Burgher, Richard L. Holmes, John Boomer
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Patent number: D339323Type: GrantFiled: August 23, 1991Date of Patent: September 14, 1993Assignee: Marelco Power Systems, Inc.Inventors: Peter Burgher, Richard L. Holmes, John Boomer