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:
Dec. 04, 1984
Filed:
Apr. 12, 1983
Noriyoshi Hashimoto, Yokohama, JP;
Kazuaki Saiki, Kawasaki, JP;
Nippon Kogaku K. K., Tokyo, JP;
Abstract
A microscope provided with a revolver having objective lenses mounted thereon and rotatable to move the objective lenses into an observation optical path comprises means for varying the load torque for rotation of the revolver at the rotated position of the revolver when the objective lenses face a predetermined position in the observation optical path, an electric motor, circuit means for driving the electric motor, means for transmitting the rotation of the electric motor to the revolver, and means for detecting the fluctuation of the load of the electric motor caused by a variation in the rotational torque of the revolver, and means for acting on the circuit means to stop the rotation of the electric motor in response to the detecting means.