14. METALLIC ANTITANK MINE FUZES.

a. Fuze, Mine, Antitank, H.E., M1A1. This fuze consists essentially of a striker as-sembly and a body which contains the primer and detonator. The striker assembly, on the outer end of which is a 2-inch diameter head,protrudes approximately 3/8 inch be-yond the body of the fuze. The detonator assembly protrudes from the bottom of the fuze. The firing mechanism, contained within the striker assembly, is restrained from firing when in armed condition (safety fork withdrawn) by the collar just below the head and two shear pins. Upon assembly of the complete round, the detonator enters a mat-ing cavity in the body of the mine. This fuze, which contains the booster as an inte-gral part, is used only in the High-explosive Mine M1. It consists essentially of a striker as-sembly and a body which contains the primer, detonator, and booster. The striker as-sembly, on the outer end of which is a 2-inch diameter head, protrudes approximately 3/8 inch beyond the body of the fuze. The firing mechanism, contained within the striker assembly, is retained from firing when in the armed condition (safety fork withdrawn) by the collar just below the head and two shear pins. A force of approximately 500 pounds on the striker head is required to actuate the firing mechanism. A weight of 10 pounds dropped 24 inches will operate the fuze. When the fuze is assembled to the mine with the spider in place, these figure are materially reduced. For safety in shipping and hand-ling, a safety fork, attached to the striker head by a cord, is fitted over the collar bet-ween the striker head and the top of the fuze body. The safety fork will not be removed except when it is intended to arm the fuze. The striker head of the fuze is painted yellow and the side is marked in black with:

(1) Designation of the fuze.

(2) Loader's lot number.

(3) Loader's initials.

(4) Date loaded.

NOTE: When not packed with the mine, this fuze is packed 100 per box.

b. FUZE, Mine, Antitank, H.E., M1A1. This fuze differs from the M1, described above, in that the booster forms a separate assembly and is assembled to the mine body as is-sued. The detonator assembly protrudes from the bottom of the fuze. Upon assembly of the complete round, the detonator enters a mating cavity in the booster.

c. FUZE, Mine, Antitank, H.E., M1A2. This fuze (fig. 5) is identical in outward appear-ance to the Fuze M1A1. The detonator is more powerful to insure a high oder explosion.

Figure 5 - FUZE, Mine, Antitank, H.E., M1A2

d. FUZE, Mine, Antitank, H.E., M4. This fuze (fig. 6) functions on the "cricket" or "oil-can" principle. This means that the firing pin spring consists of a convex metal dia-phragm, which when depressed under a weight of approximately 500 pounds, snaps downward with sufficient force to detonate the fuze. The detonator is assembled within the body of the fuze.

Figure 6 - FUZE, Mine, Antitank, H.E., M4.

e. FUZE, Chemical, Mine, Antitank, T9.

(1) This fuze issued with the T7 light antitank mine operates under a load of 300 to 400 pounds. This force moves the piston into the fuze under the resistance of the spring and sleeve. The sleeve is crushed by the force, the allowing the piston to break an ampoule in the fuze. A liquid contained in the apoule detonates the primer mixture and activates the mine.

(2) The fuze is marked in yellow with its designation, loader's lot number, loader's initi-als, and date loaded.

f. FUZE, Chemical, Mine, Antitank, T8E1. This fuze is similar in outward appearance and functioning to the T9 fuze. The spring on the top of the fuze is cut away at either side, and the perforations in the sleeve are larger so that the fuze alone may be activa-ted by a force of 190 pounds. When inserted in the T6E1 mine, a force of 300 to 400 pounds is required to overcome the resistance of the Belleville spring the mine.

CAUTION: The T8E1 fuze ust never be used with the T7 mine.

f. Practice Fuzes.

(1) FUZE, MINE, ANTITANK, PRACTICE, M1. This fuze contains a smoke-puff charge and is similar in form and operation to FUZE, mine, antitank, H.E., M1A1. This fuze is similar in form and operation to FUZE, mine, antitank, H.E., M1 described above, except that it contains a smoke-puff charge in place of the booster element.

(2) FUZE, DUMMY (PRACTICE ANTITANK MINE). This item of drill ammunition is comple-tely inert. It is made of metal or plastic to simulate the Service Fuze M1 and has a re-movable safety fork.

(3) These fuzes are used with the practice mine body for training and practice.