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:
Oct. 02, 1984
Filed:
Sep. 28, 1982
Ulrich Grassme, Nuremberg, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
A dental x-ray diagnostic installation has an exposure unit consisting of an x-ray tube and a cassette holder for generating a dental x-ray exposure. The exposure unit is rotatable about a patient's head by a motor. A radiation detector is attached to the cassette holder which supplies an electrical signal corresponding to the radiation dose rate to a dose rate regulator which in turn operates a voltage control unit which sets the level of high voltage supplied to the x-ray tube such that the dose rate of the radiation emitted by the x-ray tube is maintained at a value for producing an optimum film exposure. A range adjustment for the x-ray tube voltage is externally selected and limits operation of the voltage control unit such that if the dose rate regulator supplies a signal to the voltage control unit requiring a voltage which exceeds the set limit, the voltage control unit is inhibited and instead the motor speed is adjusted to maintain the optimum exposure.