GERMAN EXPLOSIVE ORDNANCE - PROJECTILES AND PROJECTILE FUZES |
CHAPTER 5 |
GERMAN PROJECTILES |
PERCUSSION PRIMER 42/M |
EMPLOYMENT. Russian Primer from German 7.62 cm round (See fig. 322.) |
DESCRIPTION: |
0.875 inch, over-all length. |
1.188 inches, diameter of lip. |
0.938 inch, diameter of body. |
0.375 inch, threaded length. |
0.094 inch, thickness of lip. |
Number of threads, 5 RH. |
CONSTRUCTION. The brass body of the primer houses a percussion cap which fits in the bas belong a brass anvil. The cap consits of: |
21 percent mercury fulminate. |
40.3 percent potassium chlorate. |
37.8 percent antimony sulphide. |
The brass anvil is screwed into the primer body and houses a copper sealing cone. Through the center of the anvil and the sealing cone is a flash channel leading to a black-powder charge in the top of the primer. This 99-grain charge fills the whole upper recess of the primer and extented slightly below the upper end of the anvil. |
The top of the primer is sealed by a brass closing ring and the whole primer, except the brass is coated with black varnish. |
ACTION. The cap is forced against the anvil by the firing pin. The flash is then transmit-tet through the anvil igniting the black powder with this, in turn, fires the propelling charge. |
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