. A textbook on electric lighting and railways. International correspondence schools, Scranton, Pa. v. 1-3, 5 . d end ofthe cylinder, piston Jf. is forced to the left, carrying with itpush rod P, which moves the lever connected to pin 16 andsets the brakes. In moving to the left, piston Jf compressesspring 8, so that when the brake valve is put on release posi-tion, letting all the air in the cylinder pass to atmosphere,spring 8 returns piston 4 and piston stem 13 to the normalposition. Since fork 7 and push rod P are independent of §25 ELECTRIC RAILWAYS. 65 piston stem 13, the push rod must b
. A textbook on electric lighting and railways. International correspondence schools, Scranton, Pa. v. 1-3, 5 . d end ofthe cylinder, piston Jf. is forced to the left, carrying with itpush rod P, which moves the lever connected to pin 16 andsets the brakes. In moving to the left, piston Jf compressesspring 8, so that when the brake valve is put on release posi-tion, letting all the air in the cylinder pass to atmosphere,spring 8 returns piston 4 and piston stem 13 to the normalposition. Since fork 7 and push rod P are independent of §25 ELECTRIC RAILWAYS. 65 piston stem 13, the push rod must be returned to normalposition by the release springs on the brake rigging. The object of having P and13 independent of eachother is so that when thehand-brake is used andpush rod P must be pulledout, it will not be neces-sary to pull out Jf and]■! against the action ofspring .y. The travel ofthe brake piston shouldbe kept within the limitprescribed by the brakecompany. After this limitis passed, the side pres-sure of the push rod P onthe hollow stem 13 maybe great enough to bendthe rod or split the LEVER SYSTEM. 85. Fig. 70 shows asystem of air-brake leversrecommended by theChristensen diameter of the brakepiston is in this caseG inches and its area, inround numbers, is 28square inches. Supposingthat the reservoir has apressure of 60 pounds persquare inch and that fullpressure is let into thecylinder, the total pressure on the piston that shoves on
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectelectri, bookyear1901
