File:Report of the Board of officers appointed in pursuance of the act of Congress approved June 6, 1872, for the purpose of selecting a breech-system for the muskets and carbines of the military service, (14780938794).jpg

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English: Springfield Model 1870 musket, caliber .50 disassembled

Identifier: reportofboardof00unit (find matches)
Title: Report of the Board of officers appointed in pursuance of the act of Congress approved June 6, 1872, for the purpose of selecting a breech-system for the muskets and carbines of the military service, together with their report upon the subject of trowel-bayonets;
Year: 1873 (1870s)
Authors: United States. Board on Breech-loading Small-arms United States. Army. Ordnance Dept
Subjects: United States. Army Firearms Bayonets
Publisher: Washington, Govt. Print. Off.
Contributing Library: Library of the Marine Corps
Digitizing Sponsor: Library of the Marine Corps

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reech-block, nearthe completion of its movement in opening. Ejection.—By accelerating the movement of the extractor by means ofthe spiral ejector-spring, which surrounds the stem of the ejector-spindle,and bears against the bottom of its hole in the receiver at one end, andagainst the head of the spindle at the other end. When the extractoris revolved by the opening of the block, the ejector-spring is com-pressed by the ejector-spindle, the point of which rests in a cavity inthe back of the extractor above its axis of motion. The continuedrevolution of the extractor finally brings the prolongation of the ejector-spindle below the axis of motion; as soon as the center is passed, thesudden release of the ejector-spring causes the extractor to rapidly rotateabout its axis, and to carry the empty cartridge-shell against thebeveled surface of the ejector-stud, by which it is deflected upward andthrown clear of the gun. ^note.—This is the aroi issued for experimental trial in the field.
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30 July 2014


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