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ation are in close contact with each other and with the sides of the box. The arrows indicate the direction of the current. Similar devices are shown under rotary blower ; rotary pump. In Cochrane's meter for measuring liquids under pressure, the measurement is effected by a pivoted vessel resembling a double scoop, which tilts and discharges when either side is full. A bent lever below this is tilted back and forth at each movement of the scoop, actuating the registering mechanism. Atwell's cylindrical case has a piston E which turns on an axial shaft communicating motion to the register, and carrying an arm which, at the end of each stroke, changes a cylindrical valve F2 so as to cause the water to alternately enter and discharge from the measuring-chamber at opposite sides of the internal partition C. Pulsating-piston meter. In Fig. 2972, a water-wheel within a pipe is connected to a register to indicate the flow of water. The flow is regulated by a sliding-valve.
. 147,574RobinsonFeb. 17, 1874. 147,981SargeantFeb. 24, 1874. 150,264StrongApr. 27, 1874. 151,018GaarMay 19, 1874. 151,841CassJune 9, 1874. 152,241MortonJune 23, 1874. 153,728Sloan et al.Aug. 4, 1874. 158,436PlankJan. 5, 1875. 161,624McEwenApr. 6, 1875. class I. — motors. 1. Hydraulic Engines and Water-Wheels. No.Name.Date. 120,975JenningsNov. 14, 1871. 121,441WelchNov. 28, 1871. 128,615GreenleafJuly 2, 1872. 131,616HydeSept. 24, 1872. 136,452PalmerMar. 4, 1873. 142,551AtwellSept. 9, 1873. 146,120BackusJan. 6, 1874. 2. Steam, Air, and Gas Engines. See gas-engine, pp. 947-949; air-engine, pp. 35-45. 114,429FontaineMay 2, 1871. 121,702BuckmanDec. 12, 1871. 121,891NicholsonDec. 12, 1871. 121,626JeffreyDec. 5, 1871. 122,484NicholsonJan. 2, 1872. 123,414NicholsonFeb. 6, 1872. 153,440LaubereauJuly 28, 1874. 3. Springs in various Combinations. 36,084HallAug. 5, 1862. (Reissue.)39, 827ParrotSept. 8, 1863. 67,730CurdtsAug. 13, 1867. 73,303CuppersJan. 14