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US 4,782,582 AGranted
Process for the manufacture of a toroidal ballast choke
AssigneeEastrock Technology Inc.
InventorJoseph A. Venezia
Life of this patent
Estimating the term…
Abstract
A process for the manufacture of a generally toroidal or annular choke, in which a magnetic core is provided with an insulative layer, e.g., by an injection or other molding process, and divided into two parts. Each of the parts is then provided with a respective winding. The two chokes thus made can be electrically connected in series and mechanically joined to form a choke having the shape of the original core. Preferably, the original core is annular and each of the pieces is roughly semi-annular.
Claims7
A process for the manufacture of a choke, comprising the steps of:
- providing a layer of an insulative material on an annular core of a magnetic material, said annular core having at least two distinct surfaces each extending around the entire circumference of the core, said layer-providing step being performed in such a manner that the layer covers all of one surface of the core and leaves at least two portions of at least one other surface of the core uncovered;
- dividing the core into at least two piece by dividing the core at each of the two uncovered portions;
- winding a wire of an electrically conductive material to form a respective winding on each of the pieces;
- and
- connecting the respective windings in series and mechanically joining the pieces to form a ballast choke which is a complete annulus.
2 more elements
Dependencies are inferred from the claim text.