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:
Nov. 07, 1989
Filed:
Sep. 08, 1988
Klaus Westphal, Oberkochen, DE;
Carl-Zeiss-Stiftung, Heidenheim/Brenz, DE;
Abstract
A microscope tube contains prisms mounted on a prism carriage switchable between a position for visual observation of a specimen and a position for photometry or photography of the specimen. A diaphragm (6) mounted on and movable with the carriage has a blocking position impeding entrance of light through the eyepiece window of the tube, and an ineffective or non-blocking position which does not impede entrance of such light. A manually operable handle in the form of a knob (9) mounted externally of the tube controls mechanical linkage parts (8, 10, 11) for shifting the diaphragm from its blocking position to its non-blocking position when the carriage is in the photometry or photography position, in case the user may wish to make a visual inspection of the specimen at that time. If the diaphragm has been moved to its non-blocking position, it returns automatically to its blocking position whenever the prism carriage is switched back from photometry or photography position to visual observation position, thus assuring that the diaphragm will not be accidentally in non-blocking position when the carriage is next shifted to the photometry or photography mode.