. Railway mechanical engineer . e or rustthe jack; kerosene destroys the packing; wood alcohol de-stroys packing and corrodes the metal.—Engineering andMining Journal. CYCLOIDAL WHIR METER A water meter of the weir type has recentl) been developedl.\ the Kennicott Company. Chicago Heights, 111., in whichthe rate of flow varies directly as the head of water in theweir chamber. The arrangement of the device is shown inthe drawing. Other forms of weirs in common use are ob-jectionable when applied to recording meters because of thecomplicated recording apparatus required, the rate of flowin every
. Railway mechanical engineer . e or rustthe jack; kerosene destroys the packing; wood alcohol de-stroys packing and corrodes the metal.—Engineering andMining Journal. CYCLOIDAL WHIR METER A water meter of the weir type has recentl) been developedl.\ the Kennicott Company. Chicago Heights, 111., in whichthe rate of flow varies directly as the head of water in theweir chamber. The arrangement of the device is shown inthe drawing. Other forms of weirs in common use are ob-jectionable when applied to recording meters because of thecomplicated recording apparatus required, the rate of flowin every case being a more or less complicated function of thehead. With the cycloidal weir the direct proportion of therate of flow to the head makes possible the use of the simplestform of recording mechanism and accuracy may be obtainedwithout difficulty. The weir itself is a simple box casting, the upper surfaceof which is cycloidal in contour. It is open at the bottomand is bolted or riveted over a -lot in the bottom of the weir. Cycloidal Weir Meter; Rate of Flow Varies Directly with the Head chamber. Throughout the length of the cycloidal surface isa slot accurately machined to a uniform width through whichthe water flows from the weir chamber to the storage cham-ber in the lower part of the meter. With this device it willbe readily seen that as the height of the water increases, thusincreasing the rate of flow though the lower part of the weir,the relative length of the weir slot exposed gradually de-creases, thus compensating for the effect of the increasedhead over the lower portion of the weir. Patents have beensecured covering the form of the weir. Autogenous Welding en Boiler Repairs.—Autogenouswelding for effecting boiler repairs is convenient in manyinstances, but its advantages are apt to lead to oversight ofthe real causes which produce the defects the welding is in-tended to remedy.—The Engineer. Blowing Out Stationary Boiler Tubes.—The fre-quency with which t
Size: 1714px × 1458px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
