. American engineer and railroad journal . being provided on the columnfor raising and lowering the arm. This motor also drives theoil pump for the lubricant. Briefly, the construction of the operating mechanism consistsof a cylinder, forming part of the saddle, around which is casta concentric chamber of a capacity practically equal to that ofthe cylinder. Above this is a gear box, through which the motordrives the spindle—the arrangement being for two differentspindle speeds for each motor speed. The motor is of the directcurrent variable speed type and the controller with its resistanceis m
. American engineer and railroad journal . being provided on the columnfor raising and lowering the arm. This motor also drives theoil pump for the lubricant. Briefly, the construction of the operating mechanism consistsof a cylinder, forming part of the saddle, around which is casta concentric chamber of a capacity practically equal to that ofthe cylinder. Above this is a gear box, through which the motordrives the spindle—the arrangement being for two differentspindle speeds for each motor speed. The motor is of the directcurrent variable speed type and the controller with its resistanceis mounted at a convenient location on the cylinder. The spindlepasses continuously through the center of the cylinder to thegear box at the top. The piston in the cylinder has a loose fiton the spindle and ball bearing collars are provided above andbelow it, so that all vertical movement of the piston is communi-cated to the spindle, but the rotating of the latter does not affectthe former. Air pressure from the shop line, which should not.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
