US Patent No. 519,101, granted May 1, 1894 to Spencer Spooner of Brooklyn, assignor to the Jennings Lace Works, for a warp-knitted (jersey-type) fabric of varying thickness. Extra inlaid threads are laid on the back surface only by a middle guide-bar on a warp machine, which thickens the fabric at the finger-tips of gloves, in parasols and similar articles. The text explains the guide-bar movements and needle traverses, with a patent drawing showing the thread paths, and ends with a single claim.