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, (14596636549).jpg

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English: Lieut. W. S. Smoot 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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cartridge is passed into the chamber. LocJced.-^—Bj the position of the breech-block and its friction againstthe head of the cartridge when the piece is fired. It is still furthersecured by a projection on the hammer passing under the rear end ofthe cam-lever, and making it serve as an immovable brace for the block. Fired.—By a double mainspring center-lock of the usual pattern. Extraction.—By a sliding extractor, a stud on the inside of which playsin a cam-recess on the outer side of the cam-lever. After passing a cer-tain point in opening the piece the direct pull on the extractor ceasesand the ejection is secured— Ejection.—By the acceleration impressed on the extractor by the actionof the ejector-spring on a cam formed on the lower surface of the ejector-lever. The upper end of which lever, striking a shoulder on the extractor,,throws it into a groove connected with the cam-recess, driving the shellup the inclined surface of the breech block until it is clear of the gun.
Text Appearing After Image:
27 PARTS PECULIAR AND ESSENTIAL TO THE SYSTEM. Two of Wood: 2 Tip Stock,4 Butt Stock. Nine principal metallic parts not of In in-is, mentioned: 32 Breech Block, Firing Pin, Frame, Hammer, Guard, Trigger, 29 Extractor, 28 Ejector Lever, 26 Cam Lever. Nine Screws: 14 Breech Block Hinge Scr. 12 Breech Block Spring Scr, IT Hammer Screw, l!t Guard Screw, 20 Guard Screw. 24 Ejector Spring Screw, 27 < !am Lexer Screw,9 Tang Screw, :n Recoil Stud Screw. Two Pins:Trigger Pin,Main Spring Stop Pin. Three Springs:Breech Block Spring,Main Spring,Ejector Spring. Two other minor parts:Recoil Stud,Recoil Stud Dowel Pin. PARTS NOT PECULIAR TO THE SYSTEM, OR COMMON TO ALE ARMS. Barrel and Front Sight,Ramrod, Unit Plate.Burt Plat-Butt PlateUpper BaPin,Upper Ba screw, Screw, id. Swivel and id Spring, Middle Band,SMOOT, No. 33. •prui-. -I 36 Middle Band34 Lower Band, 37 Lower Band ! 38 Tip, 39 Tip-Screw, W RearSighl Base, II RearSighl Base Screw, 42 Bear Sight Base Screw, 43 RearSighl Leal, Bear Sigh

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30 July 2014
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