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. 14, 1994
Filed:
Aug. 14, 1992
National Science Council, , TW;
Abstract
A mechanism controls the motion of the weft insertion member in shuttleless looms. This mechanism comprises a double-threaded variable pitch cylindrical cam and a slider having two pairs of frustoconical rollers. Each pair of frustoconical rollers is mounted on a thread of the variable pitch cylindrical cam. In operation, the cylindrical cam is able to rotate in a reciprocating manner by moving the slider in a rectilinear reciprocating manner. The mechanism is characterized in that the semi-conical angle of each frustoconical roller is formed such that the profile of the two threads of the variable pitch cam screw is easy to design and manufacture. In particular, the plane formed by the axes of each pair of frustoconical rollers is inclined at a predetermined angle in relation to the plane perpendicular to the axis of the variable pitch cylindrical cam and the predetermined angle is such that the thickness of each thread of the variable pitch cam screw is near constant, and uniform strength of each thread is obtained.