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Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
work of a man on a pump is estimated as equivalent to an effort of 17 1/4 pounds exerted through 2 1/2 feet in 1 second; or, 150 feet per minute = 9,000 feet per hour = 157,500 foot pounds or 70 foot tons per hour = 560 foot tons per day of 12 hours. Alarm-pump. The most favorable length of stroke on fire-engines is from 30 to 35 inches. Hydraulic-pressure pump. The power necessary is about 1 man for every 22 cubic inches of pump-barrel; double this power if double-acting. Haskell's alarm-pump for nautical use has three cylinders a a a, the pistons of which are connected to crank-arms arranged at equal angles around the shaft b, and operated, when worked as a pump, by an arm on the fly-wheel c. The three delivery-pipes from the cylinders coalesce at d, so as to form but one: their respective suction-pipes are also united above e, and the pipe formed by their junction is provided with two valves, one of which opens connection with the pipe leading to the hold and the
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
gear connection to the drive-wheel, on which the frame rested. Spear-shaped fingers gathered the grain, which was laid over to the cutter by a revolving-reel. A divider was used on each end of the platform. The driver and raker had seats on the machine. The gearing and crank were placed forward of the driving-wheel. 1835. Randall had a pair of knife-bars reciprocating past each other. Wray, 1852, had the same. 1836 Briggs and Carpenter combined the reaper and thrasher. Moore and Haskell, the same year. Ridley, in Australia, seven years afterward, did the same, and supposed himself to be the first inventor. Hazard Knowles, the machinist of the Washington Patent Office, invented in 1837 a reaping machine having a scalloped reciprocating cutter; the cutting apparatus jointed to a double arm, the opposite end of which was in turn jointed to the main frame, coincident with the axis of the crank-shaft; both supporting-wheels were drivers for the cutters. It was a front-cut
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
73. 145,823WeberDec. 23, 1874. class C. — sewing leather. 1. Machines. No.Name.Date. 9,679WickershamApr. 19, 1853. 10,615WickershamMar. 7, 1854. 11,240ButterfieldJuly 4, 1854. 11,507SwingleAug. 8, 1854. 11,571ShawAug. 22, 1854. 11,581ShawAug. 22, 1854. 11,588Turner et al.Aug. 22, 1854. 11,631TurnerAug. 29, 1854. 14,207SwingleFeb. 5, 1856. (Reissue.)363TurnerMay 25, 1856. 15,396SwingleJuly 22, 1856. (Reissue.)410SwingleNov. 4, 1856. 28,144BeanMay 8, 1860. 29,785HaskellAug. 28, 1860. 34,915TownsendApr. 8, 1862. (Reissue.)1,600ButterfieldJan. 5, 1864. 42,292JohnsonApr. 12, 1864. (Reissue.)1,962TurnerMay 16, 1865. 48,511Bradford et al.July 4, 1865. 50,117HaleSept. 26, 1865. 50,642TewkesburyOct. 24, 1865. 50,917Dawley et al.Nov. 14, 1865. 50,995Keats et al.Nov. 14, 1865. 51,157DunhamNov. 28, 1865. 51,383BeanDec. 5, 1865. 1. Machines. (continued). No.Name.Date. 52,368ReedJan. 30, 1866. 57,047ReedAug. 7, 1866. 58,550LangmaidOct. 23, 18
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
reefold action. The lubrication is done through a steam-lubricator on the steam-chest, and the waste oil passing down to the bottom of the casing lubricates the lower ends of the connecting-rods as they pass round. Three-cylin-der pump. Haskell's threecyl-inder pump, having one inlet and outlet common to all the cylinders, equalizes the application of its raising and discharging power (causing a continuous stream) by the diverse position of the three-throw crank to which the pistons ardelivery-pipe, but when oblique or horizontal, the flow is into an auxiliary tube, which curves upward and then enters the delivery-pipe. Three-cylinder engine. The four-way cock is an invention of James Watt. See Fig. 2091, page 912. Haskell's three-cylinder pump. Three-way valve. One which governs three openings, as a three-way cock (which see). Three-headed rail. Fig. 6418 is a view of Locke's three-way balanced valve for hydraulic elevators. 1 shows it supplying wat