Manual for submarine miningUnited States. War Department
History
Manual for submarine mining
United States. War Department
Submarine mines -- Handbooks, manuals, etc.
=The measuring reel and frame.=—The frame consists of two longitudinal
pieces, 3 by 4 by 66 inches, placed 17 inches apart, center to center.
At 11½ inches from each end two cross pieces, 3 by 4 by 20 inches in
length, are fastened to the longitudinal pieces with through bolts. At
the center point of these cross pieces are placed standards, 3 by 4 by
16¾ inches, which have journals for the axle of the reel, counter-sunk
in their upper ends. Two iron braces, one on each side, hold each
standard firmly in a vertical position. An iron clamp is also attached
to the upper ends of the standards, by means of which the axle is
prevented from jumping out of the journals. Distance from center to
center of standards is 43 inches.
The iron axle of the reel is 1½-inch round iron, 54 inches in length.
At each end of the axle a screw thread is cut for the nut which holds
the crank in place. Inside the screw thread the axle is squared to
receive the socket of the crank. Two collars prevent the wooden
reel from binding on either standard. The cranks are of the usual
design. The drum of the reel is 8½ inches in diameter; heads are 2½
inches thick, made in two layers, cross-grained, and are 24 inches
in diameter; length of drum over all is 36 inches. Iron plates are
fastened in the center of each head, through which the axle passes. The
reel is prevented from turning on the axle by keys.
Three ¾-inch rods pass through the iron plates and drum and bind these
parts firmly together.
At 6 inches from the ends of the longitudinal pieces a hole is bored to
receive a lag screw, ½ inch by 6 inches, by means of which the whole
apparatus can be firmly fastened to the deck.
The brake is a piece of 3 by 3 by 36 inch hardwood, used as a lever to
bring pressure on the drumhead. There is one for each side, and, when
not in use, each rests on one of the longitudinals, being held in place
at one end by two staples and at the other end by a bolt and pin.
Near the drum on one head is a hole through which the inner end of the
measuring line can be passed and stapled to the outside of the head.
=The cable-reel frame.=—The frame is made in two parts which, when in
use, are held in proper relative positions by means of two iron ties
provided with turnbuckles at their centers. The ends of these ties are
bent over at right angles and fit in sockets in the two end parts.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account