Improvised Munitions Handbook (Improvised Explosive Devices or ...

4. Thread string through hole in cigarette.
5. Tie string around rear of clothespin, 1/8 inch or less from
end. The clothespin may be notched to hold the string in
place.
Note: The string must keep the rear end of the clothespin closed so that the jaws stay open and no contact
is made between the wire.
How to Use
Suspend the entire system vertically with the cigarette tip
down. Light tip of cigarette. Switch will close and initiation
will occur when the cigarette burns up to and through the
string.
Note: Wires to the firing circuit must not be pulled taut when the switch is mounted. This could prevent
the jaws from closing.