A throw-off device for use on a drum having a side wall and a head, a support
body
attachable to the side wall of the drum, a tensioning member movable relative to
the body to tension or release strands adjacent the drum head, a lever movable
between selected positions, cam and follower roller elements that are relatively
movable in response to lever movement to effect member movement, and a detent device
for releasably holding the member in selected positions, whereby the degree of
strand tensioning may be varied and retained at selected positions.