Robert D Sylvester

US Patent:

46315110, Dec 23, 1986

Filed:

Mar 1, 1985

Appl. No.:

6/707135

Inventors:

Robert D. Sylvester - Dover NH
Paul C. Horn - Somersworth NH
Vincent J. Bober - Rochester NH

Assignee:

GFS Manufacturing Company, Inc. - Dover NH

International Classification:

H01F 2728

US Classification:

336180

Abstract:

Secondary winding configurations and methods particularly applicable for toroid transformers are described for winding secondary windings over the indexed primary winding and toroidal core. The secondary winding is formed in the configuration of a multifilar winding of a plurality of coplanar parallel filaments with a first elongate strip of electrically insulating material bonded to the filaments on one side and a second elongate strip of electrically insulating material bonded to the filaments on the other side and to the first elongate strip. The resulting electrically insulated multifilar strap winding contains the filaments in substantially parallel coplanar relationship. The multifilar strap winding is wound around the toroidal core in substantially equally spaced turns. The strap winding maintains the filaments substantially in equally spaced relationship relative to each other over irregular surfaces and compound curvature of the toroidal core without crossover. Mutual inductance between the secondary winding of the invention and the primary winding is optimized while leakage inductance is minimized.

US Patent:

48114774, Mar 14, 1989

Filed:

Jun 19, 1987

Appl. No.:

7/061644

Inventors:

Robert D. Sylvester - Dover NH
Paul C. Horn - Somersworth NH
Vincent J. Bober - Rochester NH

Assignee:

GFS Manufacturing Company, Inc. - Dover NH

International Classification:

H01F 4108

US Classification:

29605

Abstract:

Secondary winding configurations and methods particularly applicable for toroid transformers are described for winding secondary windings over the indexed primary winding and toroidal core. The secondary winding is formed in the configuration of a multifilar winding of a plurality of coplanar parallel filaments with a first elongate strip of electrically insulating material bonded to the filaments on one side and a second elongate strip of electrically insulating material bonded to the filaments on the other side and to the first elongate strip. The resulting electrically insulated multifilar strap winding contains the filaments in substantially parallel coplanar relationship. The multifilar strap winding is wound around the toroidal core in substantially equally spaced turns. The strap winding maintains the filaments substantially in equally spaced relationship relative to each other over irregular surfaces and compound curvature of the toroidal core without crossover. Mutual inductance between the secondary winding of the invention and the primary winding is optimized while leakage inductance is minimized.

US Patent:

RE333450, Sep 18, 1990

Filed:

Jun 30, 1987

Appl. No.:

7/068633

Inventors:

Robert D. Sylvester - Dover NH
Paul C. Horn - Somersworth NH
Vincent J. Bober - Rochester NH

Assignee:

GFS Manufacturing Company, Inc. - Dover NH

International Classification:

H01F 2728

US Classification:

336180

Abstract:

Secondary winding configurations and methods particularly applicable for toroid transformers are described for winding secondary windings over the indexed primary winding and toroidal core. The secondary winding is formed in the configuration of a multifilar winding of a plurality of coplanar parallel filaments with a first elongate strip of electrically insulating material bonded to the filaments on one side and a second elongate strip of electrically insulating material bonded to the filaments on the other side and to the first elongate strip. The resulting electrically insulated multifilar strap winding contains the filaments in substantially parallel coplanar relationship. The mulfifilar strap winding is wound around the toroidal core in substantially equally spaced turns. The strap winding maintains the filaments substantially in equally spaced relationship relative to each other over irregular surfaces and compound curvature of the toroidal core without crossover. Mutual inductance between the secondary winding of the invention and the primary winding is optimized while leakage inductance is minimized.