Abstract: A belt tensioning device having a roller engaging an endless belt supported on at least a pair of guide disks. The axle of the roller is mounted on an adjustment mechanism for effecting a tilting of the axle to facilitate an orientation thereof to keep the belt from moving axially relative to guide disks.

Abstract: Hook construction for the harness pull of a double-lift open-shed Jacquard machine. For use in a Jacquard machine, as aforesaid, there is provided a construction for a resilient harness pull hook, same having relatively resilient characteristics in the upper portion thereof and relatively rigid characteristics in the lower portion thereof. Said construction may be obtained by appropriate treatment of the hooks during the process of manufacture of same or said characteristics may be obtained by fastening, as by welding, two separate components, one thereof being relatively resilient and the other thereof being relatively rigid. An offset may be advantageously provided in the resilient portion of such hooks for improving the guidance thereof.