. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 236 BULLETIN 711^ U. S. DEPAETMENT OF AGEICULTTJEE. the attachment of a collar with ball bearings. The rest of the shaft, or the part which is 10 inches in diameter, is set in a concrete base, high enough to allow the arms to clear the bunks, and far enough from the track to permit either arm when at right angles with the track to reach 1 foot be- yond the outer rail. The concrete base is 9 feet square at the bottom and 6 feet square at the top. The repelling ends of both. Fig. 78.—Ground plan of two-poke log unloader.
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 236 BULLETIN 711^ U. S. DEPAETMENT OF AGEICULTTJEE. the attachment of a collar with ball bearings. The rest of the shaft, or the part which is 10 inches in diameter, is set in a concrete base, high enough to allow the arms to clear the bunks, and far enough from the track to permit either arm when at right angles with the track to reach 1 foot be- yond the outer rail. The concrete base is 9 feet square at the bottom and 6 feet square at the top. The repelling ends of both. Fig. 78.—Ground plan of two-poke log unloader. arms are fitted with steel castings. These steel castings have sharp cut- ting edges, one of which engages a load of logs as the train moves to- ward the unloading device, penetrat- ing the nearest' log, thereby doing away with the ne- cessity of attaching the arms to the car by a cable or some other method. In unloading the train moves toward the unloader slowly, seldom finding it necessary to stop. The average time consumed in un- loading 15 cars of logs, containing approximately 70,000 feet, is about 8 minutes, which includes the coupling of cars, knocking out the blocks, etc. The cost of making and installing the machine described above amounted to $1,000; $900 for mak- ing and $100 for installing. At the end of three years of use nothing had been spent for repairs. The cost of operation, other than train crew labor, consists of about one gallon of lubricating oil per Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
Size: 1801px × 1388px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, booksubjectagriculture
