said ratchet wheel being secured within {HEAD ~ said chamber} by {TAIL ~ a C shaped clamp} and a cover plate 
by
said ratchet wheel being secured within { HEAD ~ said chamber } by { TAIL ~ a C shaped clamp } and a cover plate
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH