Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . 22S2. further secured by keys to a broad base-plateB B, imbedded in the solid masonry forming partof the floor of the forge. The standards aresurmounted, and their upper extremities united,by a species of entablature C, in which the steam-passages and valve-face are formed, and to theupper surface of which the steam-cylinder D isbolted. The piston-rod E is fitted to work ver-tically through a stuffing-box in the centre of thisentablature, and its lower extremity is directlyattached to
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . 22S2. further secured by keys to a broad base-plateB B, imbedded in the solid masonry forming partof the floor of the forge. The standards aresurmounted, and their upper extremities united,by a species of entablature C, in which the steam-passages and valve-face are formed, and to theupper surface of which the steam-cylinder D isbolted. The piston-rod E is fitted to work ver-tically through a stuffing-box in the centre of thisentablature, and its lower extremity is directlyattached to the mass of cast-iron F, forming thehammer-block, which is guided to a strictly ver-tical and rectilinear course by being made to work freely in planed guides formed on thesurfaces of the standards A A. The hammer a itself is inserted into a dovetail recess in the. interiorbottom 92 HAMMERS, STEAM, DIRECT-ACTING. of the block F, where it is retained by a wooden packing and iron wedges; while the anvil b is in asimilar manner secured to the anvil-block Or. Steam is led to the machine by the steam-pipe II; a throttle or shut-off valve c, Fig. 2283, in-closed within the valve-box I, being situated close to its junction with the main steam-valve chest J,and brought within the control of the attendant workman by means of the rod and lever d d. Thealternate admission of the steam into the cylinder by the port/, and its escape therefrom by thepassage </ and waste steam-pipe K, are regulated by means of the slide-valve c, which may either beworked by hand, or, through the intervention of self-acting mechanism, by the action of the machineitself. The piston L, which is strongly constructed of malleable iron, is fitted with a single packing-ring, works steam-tight within the cylinder D, and is attached by the piston-rod E to the hammer-block F. Steam a
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
