US Patent 4,195,671, granted 1 April 1980 to Achille Bossut and assigned to J. Brochier Soieries of Lyons, describes a loom apparatus for controlling each warp yarn individually. Each warp yarn passes through an eye on the piston rod of a fluid-pressure jack. The jacks are grouped in removable, juxtaposable units arranged in at least two tiers, so warp density can be changed (up to about 150 threads/cm) for jacquard-type silk patterning without a repeat across the fabric width. The scan has a USPTO web printout with abstract, claims and description, followed by the patent's original front page, five drawing sheets and the printed specification and claims.