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Scientific American, Vol. 25, No. 16 (October 1871) (1871)

leaf 7

An illustration from Scientific American, Vol. 25, No. 16 (October 1871), 1871, leaf 7
rawing themover wire. D is a vertical guide attached to the valve. Erepresents the valve seat, made concave to correspond withthe convex under surface of the valve, F, which is hemi-spherical in form, and is made hollow with small ports pass-ing through it, by which, when it is slightly elevated,… … NOWLAN AND SPATILDINGS VERTICAL CTTT-0 FF STEAM SAFETY VALVE, STEAMGOVERNOR, FIRE SIGNAL AND GEOMETRICAL STEAM MERCURY GAGE. whistle or gong. H is the brass box for holding the ther-mometer and mercury gage ; I -is the side pipe which soundsan alarm, at a pressure, say of fifteen pounds under…

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