US Patent No. 1,067,619 by Carl Moriggl of Arbon, Switzerland, assigned to Adolph Saurer, for a divided loom reed used on ribbon looms. One set of teeth is mounted on a pivoting member so it moves away from the other set each time the reed opens, fully releasing the warp threads (including knotted ones) as the shed forms while the weft is inserted in front of the teeth. The document has patent drawings (Figs. 1-5), a specification describing the cam-driven mechanism, and three claims.