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, (14596569340).jpg

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English: French Chassepot 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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gainst the face of the cocking-piece. This al-lows the mainspring to impel it forward to the depth of its notch in thebreech-bolt and to drive the needle, which it holds, against the percussion-cap in the bottom of the cartridge. At the moment of the discharge, themiddle portion of the washer surrounding the rear stem of the needle-guide, being made of soft rubber, while the extremities are of hardermaterial, is laterally expressed against the walls of the chamber bythe longitudinal motion permitted to the guide, and by so closing themouth of chamber, prevents the escape of gas. A friction-roll in the cocking-piece allows it to move freely notwith-standing the downward pressure of the thumb in opening. Thearm using a self-consuming cartridge, the usual devices for extractionand ejection are dispensed with. Close to the firing-notch in thebreech-bolt is a shallower notch, into which, by turning the bolt to aproper point, the cocking-piece may be let down into a position of safety. m «
Text Appearing After Image:
27 PARTS PECULIAR AND ESSENTIAL TO THE SYSTEM. One of Wood:1 Stock. Eleven principal metallicparts not otherwise mentioned: 4 Receiver, 5 Breech Bolt, 6 Cocking Piece,9 Needle Bolt 11 Needle Holder, 12 Needle, 15 Needle Guide and Rub-ber Washer, 19 Trigger, 21 Guard, 25 Trigger Plate. Eight Screws: 13 Needle Bolt Screw, 17 Spring Sear Screw, 18 Spring Scar Stop Screw, 22 Guard Screw, 23 Guard Screw, 24 Tang Screw, 41 Needle Bolt Stop Screw, 12 Breech Holt Stop Screw. Three Pins: 8 Cocking Piece Roll Pin,10 Needle Bolt Pin,20 Trigger Pin. Two Springs: 14 Main Spring,IB Spring Sear. One other minor part: 7 Cocking Piece Roll. 24 PARTS NOT PECULIAR TO THE SYSTEM, OR COMMON TO ALL ARMS. Barrel, Front Sight, Bay-onet Stop and Rear SightBase, Ramrod, Butt Plato, Butt Plate Screw, Butt Plate Screw, Lower Band, CH A SSEPOT. 30 Lower Band Swivel & Pin, I 36 31 Upper Band, 37 32 Hutt Stock Swivel Plate, 38 Swivel and Pin, 39 33 Upper Band Spring,M Lower Band Spring,:(.> Rear Sight Leaf a

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30 July 2014


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