Any design having an enclosed housing with a metal attached to a magnet that is releasable by {HEAD ~ a snapping motion} or a fast shake is within {TAIL ~ this invention} 
Any design having an enclosed housing with a metal attached to a magnet that is releasable by { HEAD ~ a snapping motion } or a fast shake is within { TAIL ~ this invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL