Cap-reactor power groove ballast circuit

Claim 1

In a combined capacitor-reactor device of the type including at least first and second, spaced-apart, elongated tape-like conductive foils from intervening layers of electrical insulation rolled together to form a combined capacitor-inductor-reactor, the improvement comprising a. only the first conductive foil having its width separated into first, second and third electrically isolated, strip-like separate foil areas coacting with the remaining common second conductive foil to provide different capacitances and to function in the manner of multiple capacitor-inductor components in electrically interconnected circuit relationship, b. first terminal means connected to the first separate foil area, c. second terminal means connected to the common second conductive foil on the side thereof opposite the point of connection of the first terminal means to the first foil area relative to both width and length, whereby the capacitorreactor device functions as a parallel connected network of two series circuit branches each comprised by a series connected inductor and capacitor, d. the second terminal means being connected to the common second conductive foil at some point intermediate its width to thereby form an unconnected strip on the common second conductive foil which does not contribute to the inductance of the device, e. the third foil area being positioned opposite the unconnected strip of the common second conductive foil, f. third terminal means connected to said third separate foil area whereby a third capacitor is connected in series circuit relationship with the parallel connected series circuit branches, g. an input fourth terminal means on said second foil area of the first foil, and h. a magnetically permeable core means having a magnetic permeability greater than air positioned in the center of the roll of conductive foils and intervening layers of electrical insulation for increasing the value of inductance of the combined capacitor-reactor device.