Construction: The fuze is built with a brass nose piece, an
aluminum midsection, a fixed and movable powder ring, and a base section
which houses a black-powder magazine in the rear end and supports a
central spindle which houses the fixed firing pin. The spindle and base
section are made in one piece. The nose piece is a hollow truncated cone
con-taining four vent holes forward and threaded (R.H.) internally, rear,
to fit forward end of the aluminum midsection. The aluminum mid-section has
four vents forward and a threaded (R.H.) opening located centrally. At the
rear of the threaded opening, the aluminum piece has a longitudinal recess
to take a small coiled spring whose purpose is to prevent the freezing of
the movable primer carrier, which is partially housed in the alumi-num
midsection. A narrow lip around the base circumference of the midsection
fits into a groove on the upper surface of the fixed (upper) time ring and
forms a seal. The rear end of the movable primer carrier is housed in the
forward end of the spindle. The primer car-rier is made of a small brass
cylinder, into the top of which is threaded a small weight. The primer is
carried in the lower part of the carrier and rests on an internal lip.
Sur-rounding the cylinder and secured by a tight friction fit, is a split
brass collar which rests upon an internal shoulder in the upper end of the
spindle. The movable (lower) time ring has the time settings (0 to 30 seconds) in increments of 1/5 second. A segmented brass friction washer is
keyed to the spindle and holds the fixed time ring in position.
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