{TAIL ~ a spring} provided on {HEAD ~ the base} means in an upright position for pushing the rotatable frame upward at a point near one of the pair of the bearings which support the follower roller 
{ TAIL ~ a spring } provided on { HEAD ~ the base } means in an upright position for pushing the rotatable frame upward at a point near one of the pair of the bearings which support the follower roller
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH