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, (14596688148).jpg

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English: C. M. Spencer 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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l thechamber is exposed. In depressing the lever, a notch in the upper sideof the joint of the lever, engages with a corresponding notch in the lowerside of the firing-pin, and thus retracts it. The back of the breech-blockbears against the face of the hammer in opening, and brings it to thehalf-cock. Closed.—By reversing the action of the lever, the block is pressed for-ward against the mouth of the chamber, where it is maintained by theaction of the spiral-lever spring, which is inclosed between the face ofthe body of the lever and the block, and which keeps the rear end of thebody pressed into its notch in the frame. Locked.—By the support afforded the block, by the resting of the bodyof the lever-guard upon its notch in the frame. Fired.—By a back-action side-lock of the usual pattern. Extraction.—By an extractor sliding under the barrel, and having onits lower side a stud, playing in a groove in the hub of the breech-block. Ejection.—By rapid motion of parts in opening.
Text Appearing After Image:
39 PARTS PECULIAR AND ESSENTIAL TO THE SYSTEM. Two of Wood: 44 Sear, 39 Trigger Plate Screw, 34 Trigger, 40 Trigger Plate Screw, 2 Butt Stock, 36 Tumbler, 35 Trigger Screw, 3 Tip Stock. 31 Main Spring Swivel. 37 Tumbler Screw, Fourteen principal metallicparts not otherwise mentioned: Sixteen Screws: 5123 Recoil Stud Screw,Tang Screw. One Pin:Breech Block Pin. 8 Breech Block, 10 Breech Block Pin Screw, 9 11 Breech Block Firing- Pin 12 Breech Block Firing Pin Cap, Cap Screw, Two Springs: 7 Frame, 43 Extractor Screw, 14 Lever Spring,Main Spring. 13 Lever, 41 Firing Pin, 4546 Side Screw,side Screw, 30 42 Extractor, •»7 Bridle Screw, FOUR Other minor parts ; 24 Lock Plate, 28 Bridle Screw, ;> Side Screw Washer, 25 Hammer, 29 Bridle Screw, 2 Side Screw Washer, 26 Bridle, 32 Main Spring Swivel Scr., 50 Recoil Stud Dowel Pin, 38 Trigger Plate, 33 Main Spring Stop Screw, 49 Recoil Stud. 24 PARTS NOT PECU LIAB TO THE SYSTEM, OB CO ttMOS TO ALL ASMS. 1 Barrel and Front Bight, 55 Rear Sight

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30 July 2014


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