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:
Jan. 28, 2003
Filed:
Sep. 28, 1998
Keiji Kaneko, Saitama, JP;
Hisao Takemae, Saitama, JP;
Fuji Photo Optical Co., Ltd., Omiya, JP;
Abstract
When a constant rate switch is pressed during the operation of a seesaw switch, an output voltage of a potentiometer in the seesaw switch is stored in a condenser and a command from the seesaw switch is invalidated. The output voltage of the potentiometer when the constant switch is operated is input to an operational amplifier, and a zoom drive motor is run at a constant rate to maintain the zoom rate which has been controlled by the seesaw switch. There may be provided a function which reduces the rate in proximity to the telephoto end or the wide end, and the constant switch may also serve as another switch means such as a return switch.