US Patent 4,170,249 (granted Oct. 9, 1979) to Wayne C. Trost of Barber-Colman Company describes a warp length compensator for a triaxial weaving machine. A fixed cam shaped like an elongated figure 8 sits between a circular yarn ring and a moving chain of yarn separators, keeping each warp strand at constant length so tension stays even as the creel rotates. The scan includes a USPTO database printout of the text and claims, followed by the original patent with its cover page, three sheets of drawings (Figs. 1-12), and the two-column specification with nine claims.