Abstract: A weft thread tension control device for use in bobbin carrying shuttles. These shuttles include a bobbin compartment which supports a weft thread carrying bobbin, a weft thread tensioning apparatus which tensions the weft thread during its passage out of the shuttle and shuttle eyes which guide the weft thread from said shuttle. The tension control device comprises a tension actuated apparatus which is operative to sever the weft thread along its path of movement from the bobbin through the shuttle eyes upon the development of excessive tension therein.