In the particular embodiments described in {HEAD ~ the specification} a device is provided to protect against {TAIL ~ failure} of a switch connected to a load and to give an alarm that the switch has failed 
In the particular embodiments described in { HEAD ~ the specification } a device is provided to protect against { TAIL ~ failure } of a switch connected to a load and to give an alarm that the switch has failed
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH