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. 01, 2003
Filed:
Apr. 05, 2001
Shigeki Yagi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
To provide a DC source drive type portable X-ray fluorescence analyzer having a simple source supply operation. A power supply input section of a DC power supply driven portable X-ray fluorescence analyzer, comprising polarity discrimination means for discriminating the polarity of a DC power supply input to a DC power supply input terminal and a DC power supply input terminal and polarity display means for displaying the polarity of the input DC power according to the output of the polarity discriminating means There is also provided reverse connection protection means for preventing supply of current to a load side when input indicating that the DC power supply has reverse polarity is detected from the polarity discrimination means There is further provided switch means for switching a current path of input current and supplying a correct polarity power supply to a load when input indicating that the DC power supply has reverse polarity is detected from the polarity discrimination means