A manually laid hemispherical, contact mine used both on beaches and on land, and designated by the Japanese as "Small Type Mine, Modl 1." Two electrochemical horns protrude from the mine case; snag lines and trip wires may be attached to the horns.

Extensive use has been made of the JE in shallow-water approaches to beaches and on reefs; on beaches above the high-water mark; and along roads and landing strips of air fields.

The characteristics of the mine are as follows:

Case

Shape – Hemispherical, 20".5 in diameter and 10".5 high.

Color – Black.

Mateial - Steel.

Charge – 44 lbs. of cast Type 98 explosive.

Total Weight – 110 lbs.

External Fittings

Horns – Two, electrochemical, 180° apart and 5".5 from the top center of the case.

Cover Plate – 5".2 in diameter, in the top center of the case.

Arming Plunger – 0".45 in diameter, spring-loaded, in the center of the cover plate. The plunger is grooved and is held up by a safety fork.

Carrying Handles – Two, 180° apart, 90° from the horns and 7".75 from the center of the case.

Filling Hole Cover – 3".5 in diameter, in the center of the base.

Operation

The detonator is housed in the booster when the mine is assembled. The mine, how-ever, is not armed until the safety fork is removed from the arming plunger which moves down under spring pressure and bridges the contacts of the arming switch in the firing circuit.

The mine fires when one of the horns is bent sufficiently to brask its glass vial, allo-wing the electrolyte to run into a battery cup and form a small cell. The resultant current fires the detonator.

Safety Precautions

The mine contains no self-disarming devices. It has been found with the horns wired so that when the arming plunger is down it shunts out the detonator, and retracting the plunger arms instead of disarms the mine.

Figure 12 – A cross section of mine Type JE.

Figure 13 – The JE is often placed as a land mine, as well as for beach defense.

Figure 14 – The JE mine. Note the safety fork in place.