The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 1991
Filed:
Nov. 22, 1989
Anton Zuchtriegel, Taufkirchen, DE;
Abstract
To reduce network harmonics upon connecting a fluorescent lamp (LP) with a ower network rectifier (2) and a push-pull frequency generator (3) and a series resonance circuit (4) to the network, a harmonic filter is connected in the circuit with the fluorescent lamp. The harmonic filter includes two diode pairs (D8, D9; D10, D11) connected in forward current passing direction to the power rectifier (2). Two capacitors (C7, C8) connected to the common junction (M2) between the diodes (D8, D9) of one pair and a center common terminal (M1) between the alternately conducting transistors (T1, T2) of the push-pull frequency generator and an electrode (E1) of the lamp; and an inductance (L2) connected through a blocking capacitor (C9) to a common junction (M4) between the diodes (D10, D11) of the second pair, to provide for pumping of respectively leading and lagging reactive energy into the power network when the current wave of the a-c power supply passes through zero or null and thereby improve the overall wave shape of the power supply system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile