Manual application of a push type force to a handle actuates a cumulative timer circuit for recording the elapsed time at which {HEAD ~ an exerted force} exceeds {TAIL ~ a pre established threshold force} 
exceeds
Manual application of a push type force to a handle actuates a cumulative timer circuit for recording the elapsed time at which { HEAD ~ an exerted force } exceeds { TAIL ~ a pre established threshold force }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL