Yarn feeder

A yarn feeder comprising:

• (a) a pair of spaced plates substantially parallel to each other;
• (b) a spindle between said plates rotatably supported on said plates and including a pair of externally threaded portions having opposite thread directions, each of said plates having a plurality of guide slots extending radially of said spindle and angularly spaced from each other, the guide slots in said plates being arranged in axially aligned pairs;
• (c) a pair of threaded carriages cooperative with said spindle having respective threads cooperative with said pair of threaded portions, respectively, and movable toward and away from each other in an axial direction of said spindle in response to rotation of said spindle;
• (d) a plurality of bars extending axially along and disposed radially around said spindle, each of said bars having a pair of end portions slidably received respectively in the guide slots in one of said axially aligned pairs each of said bars having a pair of supports at its end portions;
• (e) a pair of link means each operatively connected between one of said carriages and said bars for moving said bars radially outwardly from and inwardly to said spindle in response to rotation of said spindle, and each of said link means having respective first ends pivotally connected to one of said carriages and having portions loosely connected to said supports.

A yarn feeder comprising:

• (a) a pair of spaced plates substantially parallel to each other;
• (b) a spindle between said plates rotatably supported on said plates and including a pair of threaded portions having opposite thread directions, each of said plates having a plurality of guide slots extending radially of said spindle and angularly spaced from each other, the guide slots in said plates being arranged in axially aligned pairs on the two plates;
• (c) a pair of threaded carriages respectively driven by said threaded portions, and movable toward and away from each other in an axial direction of the spindle in response to rotation of said spindle;
• (d) a plurality of bars extending axially of said spindle and disposed radially around said spindle, each of said bars having a pair of end portions slidably received respectively in the guide slots in one of said axially aligned pairs, each of said bars having a pair of supports at its end portions, said supports having a plurality of grooves;
• (e) a pair of link means each operatively connected between one of said carriages and said bars for moving said bars radially outwardly from and inwardly to said spindle in response to rotation of said spindle, each of said link means comprising a plurality of links having respective first ends pivotally connected to one of said carriages and having portions loosely connected to said supports, each of said first ends of the links being disposed in a respective one of said grounds, and a plurality of pins respectively extending through said first ends of the links across said grooves.

A yarn feeder comprising:

• (a) a pair of spaced plates substantially parallel to each other;
• (b) a spindle rotatably supported on said plates and including a pair of threaded portions having opposite thread directions, each of said plates having a plurality of guide slots extending radially of said spindle and angularly spaced from each other, the guide slots in said plates being arranged in axially aligned pairs on the two plates;
• (c) a pair of threaded carriages respectively coactive with threads of a corresponding one of said pair of threaded portions, and movable toward and away from each other in response to rotation of said spindle;
• (d) a plurality of bars extending axially along and disposed radially around said spindle, each of said bars having a pair of end portions slidably received respectively in the guide slots in one of said axially aligned pairs;
• (e) a pair of link means each operatively connected between one of said carriages and said bars for moving said bars radially outwardly from and inwardly to said spindle in response to rotation of said spindle, each of said link means comprising a plurality of links pivotally connected between one of said carriages and said bars, said guide slots including a plurality of grooves respectively, and each of said links having one end slidably disposed in one of said grooves.