DESCRIPTION. The body of the igniter consists of three parts; the upper housing, cen-ter housing, and the lower housing. The upper housing contains the pressure spring and the plunger, which has three antenne attached to its upper end. The central housing acts as a guide for the plunger. The lower part contains the percussion cap and is threa-ded for attachment to the mine.

The striker assembly consists of the striker, the striker spring and two locking balls which hold the striker in a cocked position. The striker and striker spring are contained in a plunger, being retained there by the locking balls. The upper end of the plunger is pierced to take the safety pin. The safety pin is fitted with a locking nut and is retained in posi-tion by a spring-loaded locking ball.

OPERATION. After the safety pin is removed, the igniter is armed. Eight or ten pounds of pressure on the prongs overcomes the resistance of the pressure spring and depresses the plunger. When the plunger has been sufficiently depressed, the locking balls are freed and the striker released. The striker is then driven into the percussion cap by the striker spring. (See fig. 267.)

EMPLOYMENT. This igniter has been developed for use with the S or bounding mine. Usually only the tips of the prongs are above ground.

Figure 267 – S.Mi.Z. 35 Pressure Igniter