. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. A Countershaft for Driving a Shingle Machine. cared for properly, four-ply stitched gum or six-ply cotton (Gandy) may be used to better advantage, as with this method of taking up the slack at any time belts which have a tendency to stretch more or less are not such a serious objection. The countershaft with the pulleys here illustrated should turn 600 revolutions per minute, giving a speed of 1,800 to the saw arbor with a twelve inch pulley, and a belt speed of
. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. A Countershaft for Driving a Shingle Machine. cared for properly, four-ply stitched gum or six-ply cotton (Gandy) may be used to better advantage, as with this method of taking up the slack at any time belts which have a tendency to stretch more or less are not such a serious objection. The countershaft with the pulleys here illustrated should turn 600 revolutions per minute, giving a speed of 1,800 to the saw arbor with a twelve inch pulley, and a belt speed of 5,400 feet per minute, which is about the limit for good results. If it is desired to drive the saw faster, I should advise a smaller driven pulley, so as to not exceed this travel. I know I'm treacling on danger- ous ground here, but actual results of experiments at this place lead me to this conclusion. I would recommend a distance of sixteen feet between centers as about the right thing ; longer belts than those required for this do not seem to give any better results, while shorter lengths are a positive detriment to the life of the belt. new patents in woodworking Lumber Stamping Attachment. Patentee : John P. Reedy, Williamport, Pa., patented Ottawa, 6th February, 1895 ; 6 years. Claim : 1st. The combination of a lumber sawing or trimming machine with an impact stamp located so as to swing in a plain at right angles to the line of feed of the planks and with mechanism for effecting a rapid vibration of said stamp whereby the marking of the ends of the successive planks can be effected without any stoppage in their forward movement, substantially as specified. 2nd. A controlling device for said me- chanism have a portion projecting into the path of the forwardly moving plank. 3rd. With a lever carrying an impact stamp and iocated so as to swing in a plane at right angles to the line of feed, a cam acting upon said lever so as to carry its stamp away from the pl
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
