{HEAD ~ a spring} provided on {TAIL ~ 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 
provided on
{ HEAD ~ a spring } provided on { TAIL ~ 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
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL 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