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USE:

This switch is designed to be used in booby trap installations where initiation by pressure is desired. An adjustable extension rod facilitates placement under such ob-jects as railroad, tracks, duckboards, etc.

DESCRIPTION:

This mechanism consists of a body enclosed in a case and covered by a hinged lid. Two small holes in the bottom of the case facilitate attachment. Inside the case is lo-cated a double trip lever which engages a notch on the under side of the striker and re-tains the striker in the cocked position against the compression of the striker spring. The open end of the switch body is threaded internally to receive the fuse adapter, which contains the percussion cap. The trip lever is held in the raised position engaging the striker by a double resistance spring. A safety pin fits through holes in the body, under the trip lever, and through the striker. A brass cylinder screws into a hole in the lid and contains a threaded extension rod.

FUNCTIONING:

Pressure on the lid or on the extension rod depressed the trip lever against the pres-sure of the restistance spring and disengages the trip lever from the striker. The striker spring then forces the striker into the percussion cap.

INSTALLING & ARMING:

1. W/O Extension Rod: Place the device in the desired position, and connect fuse adapter to explosive charge with safety fuse. Withdraw the safety pin.

2. With Extension Rod: Screw the brass cylinder tightly into the lid, and screw the extension rod to its lowest limit in the cylinder. Set the device in position, and unscrew the extension rod until contact is made with the object under which it is laid. Connect the fuse adapter to the explosive charge with safety fuse, and withdraw the safety pin. Easy withdrawal of the safety pin is prevented, if excessive pressure is applied when setting up on the extension rod. If the safety pin cannot be withdrawn easily, replace tension on the extension rod.

DISARMING:

Insert a safety pin in the safety pin hole and cut the safety fuse connecting the switch with the charge. Remove the fuse adapter, then remove switch and charge.

REMARKS:

1. To recock this switch, unscrew the fuse adapter and withdraw the striker. Rein-sert striker and striker spring, with striker notch facing downward. Push back striker with wooden rod until the lips of the trip lever engages the notch. Insert the safety pin.

2. This device is issued only for special operations and for preparatory training in these operations.