. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . tion. An automatic bell-ringeris one which is operated by compressed air. Fig. 1,Plate 29, shows the interior view of the automatic bell-ringer and Fig. 2 the manner in which it is attached tothe bell. There are two openings into the cylinder, the upperbeing the inlet, the lower the exhaust port B. Air pres-sure is admitted through the upper opening A. Theoperation of valve 43 through which a hole is drilled,admits the pressure under the single acting piston 39
. Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules . tion. An automatic bell-ringeris one which is operated by compressed air. Fig. 1,Plate 29, shows the interior view of the automatic bell-ringer and Fig. 2 the manner in which it is attached tothe bell. There are two openings into the cylinder, the upperbeing the inlet, the lower the exhaust port B. Air pres-sure is admitted through the upper opening A. Theoperation of valve 43 through which a hole is drilled,admits the pressure under the single acting piston 39,which has a stroke of 1% inches when at its extremetravel. Crank 31 has a stroke of 4 inches. The con-necting rod is in two sections, 35 and 36, which will allowcrank 31 to make a complete revolution without causingpiston 39 to move. When the ringer is started to work, piston 39 will bedriven upward, causing the bell to swing. Valve-stem42 will raise valve 43, closing the inlet port and usingthe pressure expansively by traveling the length of thelap before it will open the exhaust port. The bell having AUTOMATIC BELL-RINGER. in.
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