General Electric Company

Clarence J Harsa

Louis Robert Nerone

Victor D Roberts

David Joseph Kachmarik

Jozsef Fulop

Ferenc Papp

Laszlo Sandor Ilyes

James Kevin Skully

Jozsef Tokes

Edward John Thomas

Joseph C Oberle

James Domenic Mieskoski

Spiro Vamvakas

Gordon Alexander Grigor

Michael M Minarczyk

Brian M Ronald

Khaled I Abdel-Tawab

A method of assembling a coil includes forming a ferrite core having a top end, a bottom end, an inner opening extending from the top end to the bottom end, a cylindrical outer surface, and a step portion formed near the bottom end, the step portion extending past the outer surface. A first high dielectric material is applied on the outer surface of the ferrite core, then a conductive wire is wound onto the high dielectric material, whereafter a second high dielectric material is applied over the conductive wire.

Method of making a coil

A systematic configuration of compact fluorescent lamps of different power levels determines the operating parameters for normal operation of each respective lamp in a single-type ballast.

Systematic configuration of compact fluorescent lamps for operation in a

This invention relates to a single-ended discharge lamp having an electric circuitry placed in its base member, which discharge lamp comprises a discharge tube filled with additive and gas, is sealed in a gas-tight manner and is provided with electrodes. A base member is provided for the mounting of the discharge tube and for incorporating the electric circuitry mounted on a printed circuit board therein. The base member has a screw base mounted thereon both for mechanical and electrical connection to a socket. Furthermore, the terminals of the circuitry are fixed and are electrically connected with the electrode lead wires by means of mechanical connector arrangement where the mechanical connector component is one contiguous metal part. The essential feature of the solution according to the invention is the mechanical connector arrangement includes a base part and a connection part of which the base part is embedded in the printed circuit board and the electrode lead wires are connected to the connection part. The connection part is formed as a cavity and the electrode lead wires intrude into this cavity and the electrode lead wires are mechanically fixed and simultaneously electrically connected to the wall of the cavity.

Single-ended discharge lamp having an improved electrical connection

A gas discharge lamp ballast with an indicator of operability of the ballast is disclosed. The ballast circuit comprises circuitry for providing a d.c. bus voltage on a bus conductor with respect to a ground, and a resonant load circuit. The resonant load circuit includes lamp terminals for connecting to a removable gas discharge lamp, a resonant inductor, and a resonant capacitor. The resonant inductor and resonant capacitor are selected to set a magnitude, and resonant frequency, of a bidirectional current in the lamp. Further included is a converter circuitry, including first and second serially connected switches coupled between the bus conductor and the ground, and providing to the resonant load circuit, at a node coupled between the first and second switches, a voltage that alternates between first and second voltage levels. Circuitry for generating first and second switch-control signals for alternately switching into conduction the first and second switches, including circuitry responsive to a feedback signal representing a current in the resonant load circuit, are further included. The ballast circuit, moreover, includes overload detection circuitry for detecting if voltage applied to the lamp terminals exceeds an overload level; and circuitry for indicating, in response to such an overload condition being detected by the overload detection circuitry, probable operability of the ballast circuit.

Lamp ballast circuit with overload detection and ballast operability

Growing community of inventors

Broadview Heights, OH, United States of America

Clarence J Harsa