An Application of Six-Bar Linkage to the Thread Take-Up Lever in a Sewing Machine

Abstract

In the last report, an unsolved problem in the analysis of six-bar linkage mechanisms was studied. In this paper, as the result of the investigation on the synthesis of C-type, the author found a new type of the thread take-up lever used for the sewing machine, employing six-bar linkage which has turning pairs only and whose free end performs an ideal thread take-up motion. Thus a most noiseless operation has been attained.