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:
Jun. 30, 1998
Filed:
Nov. 03, 1995
Nobuo Matsukawa, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A power drive device is disclosed that includes a motor, a control device coupled to the motor, and a rotatable reference axle member rotatably interlocked with the rotation of the motor. A first detection member detects a first phase and a third phase of rotation of the reference axle member wherein the first phase corresponds to a rotation starting position of the reference axle member and the third phase corresponds to a near completion position of the reference axle member. The device also includes a second detection member that detects a second phase and a fourth phase of rotation of the reference axle member, wherein the fourth phase of rotation corresponds to a rotation completion position of the reference axle member. The control device drives the motor in accordance with the detected phases of the first and second detection members, and in particular, can control the velocity of the motor and the timing of the operation of the motor in relation to a second motor. The power drive device may be used in a camera to wind film and charge various mechanisms of the camera, such as a shutter.