The membrane communicates with {HEAD ~ the chute} such that the center portion of the membrane is deflected in response to {TAIL ~ a given pressure increase} in the chute, in order to actuate the switch 
The membrane communicates with { HEAD ~ the chute } such that the center portion of the membrane is deflected in response to { TAIL ~ a given pressure increase } in the chute , in order to actuate the switch
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH