. Railway mechanical engineer . the eccentric is placed with the radiusof eccentricity opposite the clapper when the bell is at restor at its extreme low point. Any movement of the bellfrom this position causes the eccentric to depress the forkedpush-rtxl against the resistance of the string; this causesthe push-rod to act as a friction brake on the eccentric. Ofcourse, the frictional resistance of the push-rod increasesdirectly with the upward stroke of the bell and decreasesdirectly with the tlownward stroke. In practice tliis device lias worked splendidly and withpracticallv no attention ex
. Railway mechanical engineer . the eccentric is placed with the radiusof eccentricity opposite the clapper when the bell is at restor at its extreme low point. Any movement of the bellfrom this position causes the eccentric to depress the forkedpush-rtxl against the resistance of the string; this causesthe push-rod to act as a friction brake on the eccentric. Ofcourse, the frictional resistance of the push-rod increasesdirectly with the upward stroke of the bell and decreasesdirectly with the tlownward stroke. In practice tliis device lias worked splendidly and withpracticallv no attention except an ociasioiial adjustment tosuit individual preferences regarding the arc of the l)ellstroke. The eccentric is made with a jj^-in. radiusof eccentricity, the push-rod of -J-iJ-in. round, the yoke of^-H-in. by 2-in. bar and llie sjjring of /ii-in. brass wirewound on a •)<|-in. mandrel. The only part requiring ma-chining is the eccentric aiul it is believed that a cast eccen-tric could be su<cessfullv Interesting Examples of Passenger Car Development Progress in Design from 1836 to Date asExemplified by One of the Oldest Car Shops THOSE who are familiar with modern railroad equip-ment oftentimes fail to realize the remarkable prog-ress that has taken place in the short period of 90years since the first locomotive was introduced in this coun-try. The history of railroad development is a fascinatingsubject, and it may be of interest to readers of the Railu-ayMechanical Engineer to review briefly the evolution of themodern passenger coach as exemplified in the work of a carbuilding plant established when railroads were in theirinfancy. One of the oldest and best known of the car shops in the date their connection with the Harlan plant back to morethan fift} years ago. The first car shop occupied by Betts & Pusey consistedof a three-story, plain brick building 65 ft. long and 45 In the basement of this building, the blacksmith fireswere located a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
