. Canadian forest industries 1886-1888. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. who runs a ground floor mill of ten thousand feet daily capa- city or over is doing an uphill business in more than one sense. The dotted lines are intended to show the location of the engine on the ground floor, also the shafting and belts sus- pended from the middle joist. The saw mill is intended to be driven by a belt direct from the pulley on engine shaft ; another pulley is placed on the crank shaft which drives the line shaft, to which the edger and other
. Canadian forest industries 1886-1888. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. who runs a ground floor mill of ten thousand feet daily capa- city or over is doing an uphill business in more than one sense. The dotted lines are intended to show the location of the engine on the ground floor, also the shafting and belts sus- pended from the middle joist. The saw mill is intended to be driven by a belt direct from the pulley on engine shaft ; another pulley is placed on the crank shaft which drives the line shaft, to which the edger and other machinery is belted. The slab saw should be a swing saw, and may be either sus- pended from above or supported from below. We prefer the latter, on account of the tendency which a suspended saw has to feed in too fast and choke up. The slab saw is driven by a quarter turn belt from the short shaft shown near the corner of the drawing. The two main belts should be provided with gravity tightener pulleys, so arranged that either one may be thrown off quickly from the sawing floor, in case of accident to the machinery, or for the purpos of examining or changing saws. In cases where it is desired to dress the lumber before shipment, the planer can be placed on the ground floor under the tramway, and driven by a belt from line shaft ; but it will not be satisfactory to run the planing machine and saw mill at the same time, as unless the power is ample, the motion is too unsteady for the planer. The dust carrier is an open box or trough, with a chain belt running through it. The bottom of the trough should be provided with slides for the purpose of discharging at any desired point in the boiler room. The carrier may be extend- ed outside the boiler house, and the surplus dust carried out and deposited in the dump cart. A tramway should also be provided from the slab saw to some convenient dumping place at a safe distance from the mill. While the small mill man may not fell able to ha
Size: 1652px × 1512px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectforestsandforestry
