In {HEAD ~ a preferred embodiment}, {TAIL ~ the switch mechanism} is affixed to the first force translation plate, and has a depressible element that extends toward the second force translation plate 
In { HEAD ~ a preferred embodiment } , { TAIL ~ the switch mechanism } is affixed to the first force translation plate , and has a depressible element that extends toward the second force translation plate
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH