. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Flo- I lows: Wlien the two engines are coupledtogether and the pumps started, pre^;surcwill be accumulated in the main reser-voirs. If the head engine is to handle thebrakes, the cut-out cock D in the trainpipe is open, and the similar cock in thetrain pipe uf the second engine is fcril riiliflirm-viijlr. RECENTLY INVEXTED AUTOM.^TIC DOUBLE HEADING FEED VALVE. to apply brakes reduces pressure on the un-der side of piston 7, permitting the pistonto be forced downward by the pressure i
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Flo- I lows: Wlien the two engines are coupledtogether and the pumps started, pre^;surcwill be accumulated in the main reser-voirs. If the head engine is to handle thebrakes, the cut-out cock D in the trainpipe is open, and the similar cock in thetrain pipe uf the second engine is fcril riiliflirm-viijlr. RECENTLY INVEXTED AUTOM.^TIC DOUBLE HEADING FEED VALVE. to apply brakes reduces pressure on the un-der side of piston 7, permitting the pistonto be forced downward by the pressure infeed-valve reservoir 25, the piston stem 9pulling away from stem 40 of valve 41,thus shutting off main reservoir pressureof the second engine. When the pistondescends, the small graduating valve 31is pulled down by the stem 9 (Fig. 3),making openings 27, which permit thepressure in feed-valve reservoir 25 to bedischarged into port 29 and out at the point30, where a whistle, if desired, may beplaced. This latter operation permits thepressure in feed-valve reservoir 25 to dis-charge and keep even with the pressureon the under side. When brakes are re-leased, the piston 7 again assumes theupper position, closing the graduating ex-haust ports and opening check valve 41,thus permitting the main reservoir pres-sure of the second engine to reinforce thepressure from the head engine. Should any accident happen to
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
