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