CHAFFEE MAGAZINE GUN
This gun belongs to that system in which a fixed chamber is closed by a movable breech-block, sliding and rotating, and operated by a lever from below. On the inner surface of the receiver are two circular guides which enter grooves in the breech-block and over which the breech-block slides. The block is a single piece hollowed out to receive the hammer and the mainspring. At the front of the block is the firing-pin, limited its motion by a screw. The breech-block is operated by a lever. The front of the lever is hinged to the front of the breechblock; its middle is hinged to two arms which are in turn hinged to the sides of the receiver. The hammer is cocked when the breech-block lever is thrown open by the pressure of the lever-hook on the face of the hammer, which forces the latter back until the nose of the sear—which is a part of the trigger—enters a notch. Reverse motion of the lever closes the block, which is locked by a projection on the lever, entering a recess in the block and in the sides of the receiver. The extractor is not rigidly connected with the breech-block, but has a longitudinal motion along its side. It does not begin to draw the shell until the breechblock has moved to the rear nearly an inch, when a shoulder on the extractor strikes a corresponding one on the block, after which both move together. The object of the extractor projecting so far in front of the block is to support the cartridges as they leave the magazine on their way to the chamber.
A shoulder on the bottom of the carrier serves as an ejector. Its effect is to rotate the empty shells through the opening in the bottom of the receiver to the ground. The magazine is in the butt-stock. The shape of the inner surface of the carrier at its front is such that the point of the cartridge as it leaves it is opposite the center of the chamber. An inclined rear surface of the carrier prevents the rear of the cartridge from rising while on its way to the chamber. When the lever is thrown open a spring at the front of the carrier causes its rear to descend opposite the mouth of the magazine. In this position it serves as a cartridge-stop, preventing the escape of other cartridges. There is no cut-off to the magazine, nor can there be, each motion of the lever being accompanied with a corresponding motion of the ratchet. As a single-loader, the piece is loaded through the carrier, the rear of which is opened by depressing the front; this should be done before the lever is opened. The trigger is locked by a set-screw when the piece is carried at full-cock. As a magazine gun three movements are necessary to operate, viz., opened, closed, fired. As a single-loader, four motions are necessary, viz., loaded, opened, closed, fired. The gun carries six cartridges in the magazine, one in the carrier and one in the chamber.
Farrow, Edward S. American Small Arms; a Veritable Encyclopedia of Knowledge for Sportsmen and Military Men. New York: Bradford, 1904. Print.
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