Engineer soldier's handbook. Page: 83
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ENGINEER SOLDIER'S HANDBOOK
inches in diameter and the other holes 10 inches in diameter.
(See fig. 17.) These augers are useful in drilling holes to
place charges for road craters.
W 50. PRIERs.-A primer is a block or package of high
explosive with a cap placed in it, or detonating cord tied
through or around it. A charge is primed by placing in it
a primer prepared as above. The purpose of the primer is
to insure detonation of charge. The cap or detonating cord
sets off the block or stick of explosive in which it is placed,
which in turn sets off the remainder of the charge.
a. Primer of TNT or dynamite, with nonelectric cap and
fuze.--Cut fuze off square with fuze cutter. See that no
dirt is in the open end of the cap, then slip it over the fuze
as far down as it will go. Hold the fuze in one hand and
crimp cap to fuze with cap crimper, making crimp near open
end of cap. Next, put cap with fuze attached into the hole
in TNT block or dynamite stick (figs. 89, 90, and 91). The
twine holding the cap in place must be tied so that when the
fuze is pulled, the twine takes the pull and the cap is not
moved in the hole.
b. Primer of TNT block or dynamite, with electric cap.-
Place cap in hole in TNT block, making a clove hitch in the
cap end of the lead wires. Pass this loop around TNT block
and pull tight, leaving the wire slack from the loop to the
cap. The same procedure is used with a dynamite stick
(see fig. 92); another method is to tie a preliminary half
hitch near the bottom of the stick before tying the clove
hitch near the top.
c. Primer with detonating cord and TNT block.-Tie cord
directly to the TNT block as shown in figure 93. To do this,
tie one-half of a clove hitch, take one full turn around the
block, then tie the second half of the clove hitch. Pull all
three turns tight so they will fit snugly against each other
and against the block.
d. Primer with ammonium nitrate cratering charge.-For
electrical firing place an electric cap in the cap well pro-
vided on the side of the container. Make several turns With
the lead wires around the knob above the cap well and pull
tight, so that a pull on the lead wires will not dislodge the
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United States. War Department. Engineer soldier's handbook., book, June 2, 1943; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc28313/m1/89/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.