US Patent No. 854,619, granted 21 May 1907 to Thomas Anderson of Glasgow, Scotland, for an improved twist lace fabric made on a curtain lace machine. Each pillar of the fabric has three longitudinal threads (a warp thread, a thick spool thread and a thin spool thread) bound by a bobbin thread. This gives cross net, Swiss, combination, muslin, clothing and openwork effects. The text covers the machine's thread-guide bars, cams, jacks/pickers and jacquards, and ends with three claims. Four sheets of drawings show the lace diagrams, machine elevations, cams and picker movements.