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. 14, 1980
Filed:
Sep. 01, 1978
Robert H Cushman, Princeton, NJ (US);
Pennwalt Corporation, Philadelphia, PA (US);
Abstract
Panoramic dental X-ray machine includes a tubehead-camera assembly which employs, in its simplest embodiment, three vertically stacked image intensifiers, the totality of their radiation input faces being substantially similar in shape and dimensions to a slot in a front panel of the camera assembly, the input faces being secured against the slot and aligned therewith such that radiations passing therethrough must then pass through the image intensifiers. Means for selectively controllably varying the potential across each of the individual image intensifiers varies the electron gain of that image intensifier to thus provide optimal contrast between multi-density structures of the dental arch and surrounding areas on a full size radiograph.