Logging; the principles and general methods of operation in the United States . a { c ?s ( U ?-— L--- ^--< ^ i ^ -h Ui jS.| \ K,. 338 LOGGING engine through a block on the peak of the boom, down underthe logs and the grab hook is caught on the bunk of the car oron the buffer log of the rollway. The winding up of the cablecrowds the logs off the car onto the rollway. Two other drumsand cables are used, one for raising and lowering the boomand the other for moving the unloader back and forth on thetrack. Another form designed to unload heaw logs from cars whilethe train is in motion consists
Logging; the principles and general methods of operation in the United States . a { c ?s ( U ?-— L--- ^--< ^ i ^ -h Ui jS.| \ K,. 338 LOGGING engine through a block on the peak of the boom, down underthe logs and the grab hook is caught on the bunk of the car oron the buffer log of the rollway. The winding up of the cablecrowds the logs off the car onto the rollway. Two other drumsand cables are used, one for raising and lowering the boomand the other for moving the unloader back and forth on thetrack. Another form designed to unload heaw logs from cars whilethe train is in motion consists of two steel arms 17 feet long madeof channel and angle iron. The arms are 18 inches wide exceptat the ends, where they are made 36 inches wide to give a broadsurface to repel the logs. A heavy casting carrying a sharpedge is attached to the outer end of each arm. The two armsare bolted opposite each other on a 24-inch journal, and arebraced with a turnbuckle. The arms and journal are set on ashaft II feet long, and 10 inches in diameter, cut down to 8inches where the journal is fastened to admit the attachmentof a collar with
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
