File:Canadian forest industries 1905-1906 (1906) (20530835491).jpg

Title: Canadian forest industries 1905-1906
Identifier: canadianforest190506donm (find matches)
Year: 1906 (1900s)
Authors:
Subjects: Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries
Publisher: Don Mills, Ont. : Southam Business Publications
Contributing Library: Fisher - University of Toronto
Digitizing Sponsor: University of Toronto

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April, 1905 THE CANADA LUMBERMAN '9 NEW PONY BAND SAW MILL. The illustration on this page shows the new and im- proved Pony band saw mill recently placed on the market by the Connell & Dengler Machine Company,of Rochester, N.Y., which they claim will pay for itself in This machine takes less than one-eighth inch kerf, usirfg an 8-inch saw 18 gauge, and is a high-grade tool at a low price. Will saw a log 45 inches diameter, is well made and durable. Will stand to feed from 15 to 120 running feet per minute.
Text Appearing After Image:
Improved Sixty-Inch Pony Band Mill Manufactured by Connell & Dengler Machine Company. a short time in lumber saved as compared with the use of the circular saw. Besides making better lumber it will save about a one-inch board on every eight cuts or one board in sixteen cuts over ordinary band mill. The following description of the mill is given by the manufacturers : The wheels are 60 inches in diameter, 7^ inch face, perfectly balanced and ground true by a special grind- ing machine which we make, (the same as for our band re-saws), for grinding and re-grinding the wheels with- out removing them from the machine. The upper wheel has spokes set in a bracing position from each side of the hub to the center of the rim, giving it suffi- cient strength to bear any strain that is necessary to give the saw its proper tension. The lower wheel has a web center, and being much heavier than the upper one, acts as a check to keep the upper wheel from over running, thus preventing the saw from becoming slack on its cutting side. This wheel is provided with a throat piece and scraper, located so as to prevent anything from dropping down between the saw and the wheel, while both wheels are provided with oil boxes and scrapers to keep them clear of saw-dust and resinous accumulations. To keep the saw clean a rack is used ; this is filled with burlap or waste, saturated in a little oil. This arrangement makes a rubbing brush 3 feet long and is very effective in keeping the blade clean. The upper wheel shaft is 4 inches in diameter, the lower one 4^ inches, both being forged crucible steel, and with two self-aligning boxes 14 inches long, one on each side of the wheel. The upper wheel is strained by weight and lever, which being very sensitive, catches all the varying conditions of the saw, caused by ex- pansion or contraction from heat, or by reason of anything getting between the saw and wheel. This combination of weight and lever is so fine that it is not necessary, when the machine is stopped, to ease up the straining screws to allow for contraction of the saw, as the tension is always equal whether the machine is running or standing still, thus avoiding breaking the saws from unusual strain. Manufacturers of band sawing machines commonly tilt the upper wheel to make the saw run in its proper place, just as is done in small band scroll saws. It must be clear that this practice is wrong when applied to wide saws, for by tilting wide faced wheels nearly all the strain is given to either edge of the saw, thus stretching one edge more than the other, and causing the saw to break. According to our method, the upper wheel boxes are so arranged that the outside box is pivoted in the top of the outside supporting arm, while the inside one permits a cross-line, or side movement of the end of arbor opposite the pivot which is controlled by a screw and hand-wheel within easy reach of the operator. By this means the saw can be made to run with its teeth projecting over the edge of the wheels sufficiently to keep the set from contact with them. There is also provided a screw adjustment to tilt the end of the upper wheel arbor to secure its proper align- ment with the lower wheel arbor which, being once done, should remain so as long as they keep true, and all changes intending to cause the saw to run in a certain position on the wheels should be effected with the cross-line adjustment. The guide above the log is balanced, and can be raised or lowered rapidly by the operator without changing his working position, and can be drawn back to allow saws to be put on or re- moved. Hard wood, soaked in oil, is used with the end grain next to the sides of the saw to guide it, though any other material can be used if preferred. The driving pulley is 30 inches in diameter, 8)4 inch face, and should run about 500 revolutions per minute. Shipping weight, about 9,000 pounds. Floor space over all, 7 feet 2 inches by 6 feet. Height from floor to top of wheel, 11 feet. Length of saw, 31 feet 6 inches. Saw mill men who wish further information should correspond with the Connell & Dengler Machine Com- pany, Rochester, N. Y. The Bowman Lumber Company has been formed at Revelstoke, B. C, and has succeeded the Empire Lumber Company. A substance called petrolignite is being adopted as a material for the decks of ships, being under trial in the French and German navies, as well as the British service. It is prepared from saw dust mixed with certain materials, and formed into slabs, under high hydraulic pressure, and has been placed upon the market in England. Its valuable properties are that it is non-inflammable and is not slippery when wet. It is said that it will not harbor germs, and that in tropical climates it will resist the attacks of white ants. It is very hard, and like hard wood, can be worked with tools into any shape.—Iron Age.

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