Racking mechanisms
AssigneeBentley Engineering Company Limited
InventorsDavid Arthur Harlow, Gillies Wood
Life of this patent
Estimating the term…
Abstract
A racking mechanism for a circular knitting machine includes at least four pawls drivable in succession in synchronization with needle cylinder movement on the knitting machine, and an evenly cut rack wheel which may be attached to a pattern drum of the knitting machine with elements to cause the pawls to selectively engage the rackwheel and to rack the pattern drum as and when required during a racking sequence. In a particular embodiment, the racking mechanism includes a device to enable all pawls to be bluffed outside a racking sequence which device can be triggered to unbluff from a timing chain stud and can be operated to bluff at the end of a sequence by a cam piece on the rackwheel.
Claims6
A racking mechanism for a circular knitting machine which includes a pair of first pawls and a plurality of second pawls, drive means for advancing the first and second pawls over the same distance in a continuous sequence, said drive means including first rotary cam means for advancing the first pawls alternately and second rotary cam means for advancing the second pawls at twice the frequency of the first pawls, a rack wheel evenly cut around its entire periphery and removable elements mounted in the rack wheel for conjoint rotation therewith for causing some of the pawls but not others to engage the rack wheel during a racking sequence.
Dependencies are inferred from the claim text.