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:
Aug. 04, 1981
Filed:
Oct. 17, 1979
Kurt Franke, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
In an exemplary embodiment, an mAs relay having selector keys and also a digitally operating manual control for selection of mAs products is capable of being switched over for digital selection of the exposure time independently of later radiographic current selection. For this purpose, the input of the mAs relay is capable of connection to an auxiliary current source which delivers a constant auxiliary current. The operating threshold of the mAs relay is then adjusted by the digital selection of exposure time. For the purpose of overload protection, a power circuit can be present which in a step-by-step fashion reduces the x-ray tube power via the x-ray tube current to a permissible value when preprogrammed times, e.g. planigraphic exposure times provided for planigraphic operation, are exceeded for the given settings of radiographic current and voltage.