Alarm mine<br>A week ago the farm where I live had a clear out. Between all the rubbish I saw a “Henry Krank alarm mine”.<br>Which is a tripwire, when pulled a rod hits a “black powder blank”. Which after reading the safety instructions is basically a device which makes a noise when activated by the trip wire, nothing more. Are these things legal? If so does the producer still exist? Where can I get the blanks? <br>I put it to one side as it would have been thrown away but is it worth keeping?<br>Reinhardt<br>