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:
Apr. 04, 2000
Filed:
Jun. 17, 1997
Christopher J Ryan, Lancaster, PA (US);
Richard R Wright, Reinholds, PA (US);
Philips Electronics N.A. Corporation, New York, NY (US);
Abstract
A cable drive apparatus is presented which has minimal cable slippage and backlash. Such a cable drive is particularly well suited for systems requiring accurate positioning and repositioning capabilities, such as motorized camera orientation systems. To achieve minimal slippage on a cable driven pulley, one or more positioning balls are located at fixed locations on the cable, and corresponding positioning holes are located on either pulley. Tensioning means are also provided to remove slack, to minimize the backlash which may result from the stretching of the cable over time. A two pulley system is presented wherein the cable is fixedly attached to one pulley, travels over the other pulley which has the slippage constraining positioning holes, and then to tensioning means which also fixedly attached to the first pulley.