US Patent No. 951,449, granted to Anker Petersen of Chelsea, Massachusetts, on March 8, 1910, for a circular loom that weaves tubular fabric at high speed using several shuttles. The document has four sheets of patent drawings (Figs. 1-9) followed by the specification and 23 claims. The specification describes a circular shuttle raceway made of two rings joined by vertical reed dents, a cam ring that drives both the shed-forming heddle levers and the shuttles, a weft-packing wheel on each shuttle that replaces the reed, spring warp take-ups, and the let-off and take-up mechanisms. It notes that one cam groove gives plain weave and that extra grooves and levers could produce a twill surface.