. American engineer . h a side sill equal in depth to the center sills;all without truss rods—a matter of opinion of the designer, butnot tending toward a uniform steel underframe construction. Deykg IMPROVED FLOW METER In largt power iilants, etc., the economical handling of steam,water and air depends on accurate information which will showthe total volume transmitted and its instantaneous rate of flowduring any interval of time. The meter shown in the illustra-tions is designed for use either as a test instrument or as astationary meter. The body consists of an iron casting coredout so as t
. American engineer . h a side sill equal in depth to the center sills;all without truss rods—a matter of opinion of the designer, butnot tending toward a uniform steel underframe construction. Deykg IMPROVED FLOW METER In largt power iilants, etc., the economical handling of steam,water and air depends on accurate information which will showthe total volume transmitted and its instantaneous rate of flowduring any interval of time. The meter shown in the illustra-tions is designed for use either as a test instrument or as astationary meter. The body consists of an iron casting coredout so as to form one leg of a U-tube and a reservoir for mer-cury, the outer leg of the U-tube being formed by a pipe whichopens into the reservoir. The pressure on the surface of themercury varies with the rate of flow of the fluid being meas-ured, as will be explained later. A float rests on the surfaceof the column of mercury in the body of the meter and risesand falls witli the corresponding chaiii^c in it.^ ek\atinn. The. Indicating Recording Flow Meter. float is geared by a rack and pinion to a horizontal shaft whichcarries a permanent U-shaped magnet. The poles of this mag-net face a copper cap which closes an opening into the meterbody and the remaining parts of the meters mechanism aremounted on the outside of the cap. A shaft, parallel to the oneon which the magnet inside the body is mounted, carries asmaller magnet, wdiose poles are opposite to those of the largermagnet, this arrangement serving to transmit motion throughtlie cap without piercing it with a shaft. As the poles facingone another are of opposite polarity, the magnetic flux bindsthem together so that a movement of the magnet inside thebody involves a corresponding movement of the one outside,the latter moving the indicating neecfle and the recording penthrough suitable mechanism. The pressure which moves the column of mercury in the U-tube is obtained, for pipes 2 in. and greater in diameter, by in-serting a mod
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
