STATIONÄRE ENGINES . 219 calculated to work with a pressure in the boiler of 40 lbs . per square inch . The piston is 17 inches in diameter , the stroke being 3 feet , and the number of revolutions of the crank about thirty - five . The pump is double - acting , consisting of bücket and plunger ;… … Fig - . 139 . — Pump Eucket . tion for driving the pump consists of a pinion on the engine shaft and spur wheel on the pump shaft , the gearing being in the proportion of 3 to 1 . The fly wheel on the engine shaft is 11 feet in diameter , and weighs 5 tons 12 cwts . ; a balance is placed on the…
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