. Scientific American Volume 64 Number 08 (February 1891) . steam or water under pressure forces thepiston out to the position shown in the lower figure,no steam or water then escaping; but when the handleis moved inward until its hub strikes against the stuff-ing box, as shown in the upper figure, the bore in therod then forms a passage between the interior and theexterior, and the engineer or fireman can see whethersteam or water escapes, the piston being again forcedoutward when the handle is released. When it is de-sired to repack the barrel, the screw is removed fromthe slot in the guide,
. Scientific American Volume 64 Number 08 (February 1891) . steam or water under pressure forces thepiston out to the position shown in the lower figure,no steam or water then escaping; but when the handleis moved inward until its hub strikes against the stuff-ing box, as shown in the upper figure, the bore in therod then forms a passage between the interior and theexterior, and the engineer or fireman can see whethersteam or water escapes, the piston being again forcedoutward when the handle is released. When it is de-sired to repack the barrel, the screw is removed fromthe slot in the guide, and the handle is turned to bringthe thread on the rod in engagement with the threadin the barrel near its outer end, thus shutting off com-munication between the interior and the stuffing box,when the gland can be conveniently removed and thestuffing box repacked, without annoyance from leak-ing steam or water. 4111 » AN IMPROVED BICYCLE illustration represents a bicycle treadle designedto lighten the labor of running a machine, and especi-. CUSHMANS BICYCLE TREADLE. ally to facilitate the work of hill climbing, its construc-tion being such as to:increase theleverage upon the crankarms on the downward stroke, when, also, the pedalsand the cranks are tied together, the improvement be-ing adapted for attachment to any pedal now in use. It is a patented invention of Mr. George W. Cushman,of No. 159 Eighth Avenue, New York City. A ratchetwheel is attached to the crank spindle upon which thepedal turns, between the inner side plate of the pedaland the face of the crank arm, and the pedal has aux-iliary side plates of greater length than usual, theseside plates permitting the use of two foot-rest bars ateach side of the crank spindle. Upon one of the sideplates of each pedal is pivoted a spring-pressed pawladapted for engagement with the ratchet wheel, asshown in Fig. 1, the pawl slipping over the ratchetduring the upward movement of the pedals, but en-gaging the ratch
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectyellowfever
