. 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. s from the pawl, andprojecting through a slot of peculiar outHne. This isshown in the cut directly below the drawing of theratchet wheel and weight. This slot and pin mechan-ism is so arranged that only one of the pawls at a timeengages with the teeth. Whenon closed c
. 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. s from the pawl, andprojecting through a slot of peculiar outHne. This isshown in the cut directly below the drawing of theratchet wheel and weight. This slot and pin mechan-ism is so arranged that only one of the pawls at a timeengages with the teeth. Whenon closed circuit, the upper pawlonly is in engagement. Whenthe detent is released, the upperpawl is first acted on by therevolving wheel. This actiondraws the hammer back fromthe bell. As the pin rides throughthe slot, the pawl escapes fromthe teeth, the other one en-and the hammer is driventhe bell. The bell-ringing lever rises and isagain caught by the detenti\ \\ j u s t as the pawls change ? ? <4!^^r places, and the motion is arrested with the upper pawlengaged until the next breakin the current occurs. 443. Striking mechanism^ 444. Electric connectionand hammer. 183 gages. agamst 184 ELECTRIC POWER AND DEVICES. 445. ELECTRIC TREE-FELLING MACHINE. The two-wheeled vehicle is anchored to a tree ; the motor on a platform drives. by belt a routing tool below, both swinging on a common center. Ahandle extending to the rear serves to guide the cutting tool, and aratchet and rack feeds the cut. German design. 446. Plan, showing grappling chains, routing tool, frame andhandle. 447. ELECTRIC TRUMPET. The apparatus consists of a brasstube 2^ in. in length and lyi in. in diameter, in the interior of which is fixed a small armature is placed oppo-site the poles of this latter,and a regulating screw ter-minating in a platinum pointserves as an automatic inter-rupter. It takes but twoLeclanche elements of theusual electric-bell variety to cause it to produce an agreeable music
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Keywords: ., bookauthorhiscoxga, bookcentury1900, bookdecade1910, bookyear1910
