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. 20, 1989
Filed:
Dec. 01, 1988
Steven A Yon, Altamonte Springs, FL (US);
Luis A Diaz, Apopka, FL (US);
NCR Corporation, Dayton, OH (US);
Abstract
The subject invention is a power supply having an input for receiving a power signal, a DC storage device connected to the input, a primary output connected to the DC storage device and connectable to a battery, a DC to DC converter for converting the voltage at the DC storage device to an auxiliary DC voltage, the converter having a supply voltage input, and a switching circuit. The switching circuit includes first, second and third switches. The first switch is responsive to the power signal for providing the DC storage device voltage to the converter supply voltage input. The second switch is responsive to the voltage on the battery for providing the DC storage device voltage to the converter supply voltage input. The third switch is responsive to an auxiliary voltage on/off signal for overriding the second swtich.