. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Tm CANADA LUMBERMAN [Vol |Nu Volume XVIII. MBER 3. } TORONTO, ONT., MfVRGfi, 1897 J Terms,$ Per Year 1 Single Copies, 10 Cents. AN ELECTRICALLY-DRIVEN BAND-SAW. The application of electricity for saw mill pur- poses is rapidly coming to the front. At a recent exhibition at Geneva one of the interesting features was a horizontal travelling band-saw at work, as shown in the accompanying illustration. This saw was designed for sawing logs of timber of any length
. Canadian forest industries 1897-1899. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Tm CANADA LUMBERMAN [Vol |Nu Volume XVIII. MBER 3. } TORONTO, ONT., MfVRGfi, 1897 J Terms,$ Per Year 1 Single Copies, 10 Cents. AN ELECTRICALLY-DRIVEN BAND-SAW. The application of electricity for saw mill pur- poses is rapidly coming to the front. At a recent exhibition at Geneva one of the interesting features was a horizontal travelling band-saw at work, as shown in the accompanying illustration. This saw was designed for sawing logs of timber of any length. The frame is made to travel, while the log is fixed on the foundation floor. This kind of saw requires more space than the ordinary one, but works without interruption, as, owing to the length of travel, while the machine is working on one log another one can be pre- pared and set at the other end of track. The ma- chine is driven by two independ- ent three-phase motors ; one of them of 6 , running at 810 revolutions, is set on the plat- form of the trav- elling frame, and provides for for- ward and back- ward movement. From the motor pulley the move- ment is trans- mitted by a belt to a larger pul- ley, and then by a worm and wheel gear to a friction wheel fixed on a verti- cal spindle, that can be moved radially on a large disc, thus permitting the operator to vary the rate of travel of the frame, as the movement is transmitted from this shaft to the driving wheels by means of a vertical spindle and two conical gears. The return movement is very rapid, attaining a maximum speed of 47 ft. per minute. The reversal is obtained by a double conical friction gear. The forward movement can be regulated at will ; the minimum speed is 3)^in. per minute. The other three-phase motor of 16 is direct- coupled on to the spindle of one of the band-saw pulleys, and drives it at a speed of 480 revolu- tions a minute, the band saw attaining a linear velocity of about 125 ft. per sec
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
