. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Fig. 4—Pulp Wood Splitter. Fig. 2—Swing Frame Pulp Wood Saw. add to the plant in the future by laying another pipe or otherwise increasing the quantity of water passed per minute and installing more wheels. To increase the power developed by an increase in the running head will be found in most cases to be a costly remedy This latter method is very unsatisfactory from the standpoint of a pulp mill owner. If a turbine is installed to run at a certain head, with fu
. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Fig. 4—Pulp Wood Splitter. Fig. 2—Swing Frame Pulp Wood Saw. add to the plant in the future by laying another pipe or otherwise increasing the quantity of water passed per minute and installing more wheels. To increase the power developed by an increase in the running head will be found in most cases to be a costly remedy This latter method is very unsatisfactory from the standpoint of a pulp mill owner. If a turbine is installed to run at a certain head, with full gate, and the head is afterwards increased, the wheel will develop more power cer tainly, but the speed will be higher also. As the turbines « Paper read beforethe Engineering .Society of the School of Practical Science, Toronto, and published by permission. practical Fig. 3—Pulp Wood Barker. handle is provided on the cradle, by means of which the wood is swung against the saw. When the logs are sup- plied in long lengths this saw will not do, and another method has to be used. A swing saw can be used, the frame of the saw swinging on the counter shaft. In this way the saw is brought to the log. The capacity of a 18- mch saw, mounted in this way, would be about one cord per hour. Jump saws are used in some mills. These are run by a steam cylinder and piston. The piston is secured to the saw frame, which slides vertically in guides On pressing the treadle, steam is admitted into the cylinder driving up the piston and saw, which cuts through the log from the underneath. One of the mills in the Maritime provinces has installed a very satisfactory system. It consists of 6 or 8 saws, mounted in pairs, and so situated that only two saws can cut at a time. Between each pair of saws is a conveyor chain, running the full length of the saw bed. A log is rolled onto the upper end of the bed, and is caught up by all the conveyor chains at once, and carried to the saws. On passing
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