United States Congressional Serial Set Volume 4449 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...parallel columns; the two outer ones are equal in strength to and work tandem with the middle column, so that the stroke of each column is approximately one-half of the recoil of the piece. Wire cables lead from the two outer columns around ballbearing pulleys on the cradle trunnions and through covered grooves in the cradle to the breech of the piece to which they are attached. 25. The sights (VII, photograph 34) are mounted in sockets attached to the left side of the cradle. The front sight is an ordinary V point; the rear sight is a straight bar tangent sight, graduated in degrees and minutes, for both range and deflection. It is without levels of any kind. COCKERILL-NORDENFELT. Photographs 12 to 15, inclusive. 26. The gun is 2.953 inches in caliber and is a built-up construction consisting of tube, jacket, and key ring. The jacket has a single trunnion, on which the gun is mounted in the rocker and around which it has an azimuth motion of 3 degrees on each side of the axis of the carriage. 27. The breech mechanism (photograph 12) is of the Nordenfelt eccentric screw type, in which the block is opened or closed by being turned 180 degrees about its axis. The operating lever is secured to the breech face of the block by a bayonet joint. It carries the firing mechanism, which is of the continuous-pull type, the mechanism being cocked and the piece fired by a lanyard pulled from the rear. The extractor lies in the groove in the breech recess and has a lip at its front end engaging the rim of the cartridge case. It is actuated by a lug at its rear end working in a cam groove in the breechblock. An automatic safety lock is provided, which is tripped at the discharge of the piece. At other times it must be tripped by hand before the breech...