. 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. ofthe helical springs surround-ing its axle, thus keepingthe tension of the belt prac-tically constant. The rim sections or shoesof these pulleys are supportedupon a felly, or frameworkformed of two lazy tongs joined at their summits and pivoted together atthe middle
. 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. ofthe helical springs surround-ing its axle, thus keepingthe tension of the belt prac-tically constant. The rim sections or shoesof these pulleys are supportedupon a felly, or frameworkformed of two lazy tongs joined at their summits and pivoted together atthe middle of their branches so as to form a series of equal diamondswhich must all elongate or flatten simultaneously. 645. MULTIPLE-SHAFT DRIVING DEVICE. The four crankpins are pivoted on an oscillating and sliding sleeve on a central post, as shown in the planand vertical shaft may bethe driver. All theshafts must be at rightangles with each other,and in the same planefor perfect action. 646. Vertical sec-tion showing centralsliding post. 647. RECIPROCATING WITH STOPMOTION. A swing lever operated by acrank may have two stops in each revolutionby the opposite curves in the slot of the lever,which are circular, having their radii to cor-respond with the distance from the crank cen-ter to the outside of the crank
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
