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:
Jun. 19, 1990
Filed:
Jun. 13, 1989
Robert W Johnson, Jr, Raleigh, NC (US);
William J Raddi, Raleigh, NC (US);
George W Oughton, Raleigh, NC (US);
Exide Electronics, Raleigh, NC (US);
Abstract
An uninterrupted power supply (UPS) systems is provided comprising a rectifier circuit, an inverter circuit and a battery boost circuit. One of the input terminals of the rectifier circuit is for connection to the ungrounded conductor of an AC power source and the other input terminal of the rectifier circuit is for connection to the grounded conductor of the AC power source. The UPS has a pair of load terminals for connection to a load. The input terminal of the rectifier circuit for connection to the grounded conductor is connected to one of the pair of load terminals by an electrical conductor whose electrical continuity is maintained from this input terminal to the one of the pair of load terminals without any isolation device such as a 50 or 60 Hz transformer being disposed between the input terminal and the one of the pair of load terminals.