Jason Paul Jacobs

US Patent:

55393691, Jul 23, 1996

Filed:

Sep 28, 1994

Appl. No.:

8/314614

Inventors:

Edwin J. Selker - San Jose CA
Jason M. Jacobs - Cambridge MA
Robert J. Kelley - Scio OR
Joseph D. Rutledge - Mahopac NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01F 2728

US Classification:

336212

Abstract:

An induction device has an elongated core made of two or more uniform ferromagnetic spaced-apart toroids. A first winding around the core creates an inductor. When the induction device includes a second winding, a transformer is created. The transformer acts as a powercord transformer when the exposed ends of one winding are available at one end of the elongated core for connection to a source of alternating current and the exposed ends of the other winding are available at the other end of the core for connection to a load. An inductor with a single-turn winding can be constructed by first forming the core by stacking two or more ferromagnetic toroids end-to-end and spaced apart, then threading two wires through the core center and placing two wires outside the core and connecting the ends of the wires to create the winding. A transformer can be constructed by first following the steps to create an inductor. A second winding is then created in a similar manner as the first winding.