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Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
the cap. This is usually effected, as at B, Fig. 4209, by lengthening the shorter branch a of the main-spring so that the arm b of the tumbler shall strike it just previous to the impact of the hammer on the cap, caused by the action of the long branch c of the main-spring transmitted through the swivel d; the effort made by the branch c in restoring itself, after the momentary compression, throws back the tumbler sufficiently far to permit the sear c to enter the halfcock notch. In Dane's patent (A), used in the Parker gun (see shot-gun), the long branch of the mainspring is arrested by a stop f at about the position of half-cock, the tumbler being carried forward by its momentum until it strikes the cap, when the pressure of the sear on the cam-shaped extension g throws the tumbler back until the nose of the sear enters the half-cock notch, or sufficiently far to lift the hammer clear of the nipple. Re-ceiv′er. 1. (Chemistry.) A vessel connected with the neck of a r