. The Street railway journal . 4 ins. in diameter which is con-nected direct to the main reservoir; a piston working in thecylinder is acted upon on one side by the pressure of the airin the main reservoir and on the other by the tension andcompression of springs. Movement of the piston throws atoggle joint over its center and causes a hammer to strike aswitch-arm which makes or breaks the circuit to the airpump. The working parts are all contained in a box 8 ins. long,5^2 ins. wide and 4 ins. high. The box is filled with oil,which not only keeps the working parts lubricated but alsoserves to
. The Street railway journal . 4 ins. in diameter which is con-nected direct to the main reservoir; a piston working in thecylinder is acted upon on one side by the pressure of the airin the main reservoir and on the other by the tension andcompression of springs. Movement of the piston throws atoggle joint over its center and causes a hammer to strike aswitch-arm which makes or breaks the circuit to the airpump. The working parts are all contained in a box 8 ins. long,5^2 ins. wide and 4 ins. high. The box is filled with oil,which not only keeps the working parts lubricated but alsoserves to extinguish the arc caused by the breaking of thecircuit. A tightly fitting cover prevents leakage of filled with oil the governor weighs but 12 lbs. The device is rightfully named a pneumatic governor, asthe only electrical features about it are the two terminalsand the switch-arm which makes the connection between STREET RAILWAY 586 STREET RAILWAY JOURNAL. [Vol. XXVIII. No. 15. the terminals. The pressure at which the governor cuts inand out is regulated by changing the position of two ad-justable nuts on the piston rod. The governor has been inpractical operation on cars for more than a year. AN INCANDESCENT LAMP FOR RAILWAY USE The Franklin Electric Manufacturing Company, of Hart-ford, Conn., has recently put on the market a new lamp de-signed especially for street railway and other work wherethere is much vibration. In this lamp the filament is an-chored at its lowest pointand is supported directlyfrom the stem. As will benoted from the accompany-ing illustration, this is ac-complished by a small glasscolumn extending from thestem past the upper por-tions of the filament filament is securelyfastened to an anchor wirewelded in said glass col-umn, and the greatest pos-sible rigidity of filamentsupport is thus obtained. Through this improvedmethod of construction thestreet railway type sustainsvibrat
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
