Found in gold mining area: What is it? SOLVED: Fuse Link

[UncleVinnys]

Found this in a gold mining area of Folsom, California.
End pieces rotate on axis.
It is about the size of a tire pressure gauge.
wire at tip has frayed and broken off.
Any ideas?

 

[kwdstalker]

any time i can help.this is a great place to find info