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. 28, 1994
Filed:
Dec. 08, 1992
Eiichi Watanabe, Tokyo, JP;
JEOL Ltd., Tokyo, JP;
Abstract
An energy-dispersive x-ray detector designed so that the space accommodating an x-ray detector device can be evacuated well and efficiently. When the detector device is not in use, a control portion stops the operation of a compressor and the operation of a refrigerator. Then, the temperature of an adsorbent rises. Gas which has been once adsorbed is released into the space, thus deteriorating the degree of vacuum. If the x-ray detector is instructed to operate via a console portion, the control portion operates a vacuum pump and opens an exhaust valve to evacuate the inside of the space. When the output signal from a vacuum gauge indicates that the degree of vacuum inside the space has reached a given level, the control portion closes the exhaust valve, stops the operation of the vacuum pump, and starts the operation of the compressor. As a result, the adsorbent is cooled. Then, the inside of the space is maintained at a desired degree of vacuum.