. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ers of theknee or toggle-joint bearingagainst the curved butt pieceof the frame and causing acircular movement of the link,a, about its axis h. The kneerises until the moment when the mainspring, c, contained in the stockis entirely compressed, as is also the percussi
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. ers of theknee or toggle-joint bearingagainst the curved butt pieceof the frame and causing acircular movement of the link,a, about its axis h. The kneerises until the moment when the mainspring, c, contained in the stockis entirely compressed, as is also the percussion spring. The cartridgecase carried along by the extractor strikes against the ejector, whichthrows it out. The seat of the breech block being clear, the upper cartridge of themagazine is pressed by a spring in the magazine in front, of the headcylinder. The mainspring, compressed by the recoil, pushes forwardthe breech block through the medium of a stirrup which connects thetwo pieces. The knee lowers itself half-way, at the same time communi-cating its movement to the receiver and to the barrel, while the firing pinstrikes against a lug and the percussion spring remains compressed. As the knee straightens out, the barrel and the breech block againact as one piece. The arm is thus again loaded, cocked, and ready 902. ARTIFICIAL ANKLE. Thespring, B, lifts the heel for the forwardmovement of the foot; the pressure ofthe body holds the foot in contact withthe ground at the forward movement ofthe body. The motion is hmited bythe angular space between the solidbearings. MISCELLANEOUS DEVICES. 353 903. ARTIFICIAL LEG. The socket, A, has a pad, B, and strap,D, for adjusting the size to the stump. K, in i and 2, is a bridge piece in the upper section resting on the kneebolt, F, and affording the superior point ofattachment for the extensor spring, I, andtendons, i, i, which throw the foot upwardand forward as soon as it is lifted from theground in walking. The ham strings, N
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
