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