Mounted within the housing are various components of the draft sensing apparatus, {TAIL ~ these components} including {HEAD ~ a first support} 48 in the form of a shaft, a second support indicated generally at 50, the second support being pivotally mounted on the first support 48 
Mounted within the housing are various components of the draft sensing apparatus , { TAIL ~ these components } including { HEAD ~ a first support } 48 in the form of a shaft , a second support indicated generally at 50 , the second support being pivotally mounted on the first support 48
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD 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