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:
May. 16, 2000
Filed:
Dec. 11, 1997
Masahiko Otomo, Fujisawa, JP;
Kazumasa Aoyama, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An electrically-driven coarse and fine movement apparatus comprises a movable member, a driving device for driving the movable member, a first operation handle, a first rotary shaft fixed to the first operation handle, a second operation handle, disposed coaxially with the first operation handle, for rotating the first rotary shaft, a rotation restricting member for restricting a rotation of the second operation handle, which is accompanied with the rotation of the first operation handle, a rotation detector for detecting a rotational quantity and a rotational direction of the first rotary shaft, a discriminating device, linked to the second operation handle, for judging whether the second operation handle is operated or not to output a judging signal, and a controlling circuit for controlling the driving device so as to provide the movable member with a coarse movement in accordance with an operation of one operation handle of the first and second operation handles and to provide the movable member with a fine movement in accordance with an operation of the other handle by judging whether the operation is a drive operation by the first operation handle or by the second operation handle on the basis of a detection signal from the rotation detector and the judging signal from the discriminating device.