J. T. & R. H. PLASS, In all other Band Sawing-Machines the saw is placed outside of the frame and column which support the driving parts, exposing the Saws to injury from handling lumber about them, also rendering them extremely dangerous to the operator. The main feature in this Machine has been to produce a Band Saw, perfectly safe to the operator, and fully protected from injury to the Saw, combining neatness and utility in all its parts. The Saw is placed to run upward near the column, under the top arch, over the upper or tension pulley, and down near the front frame and behind the guide-bar, which can be adjusted up and down to the required height for the work to be done. It also runs through a superior adjustable guide, above and below the work, and a guide on the column, guiding equally well all widths of Sawa. 202 & 204 E. 29th St., New York. AN ADJUSTABLE SLITTING FURNISHED WHEN ORDERED. TO JOIN THE END OF BAND SAWS. Furnished by J. T. & R. H. Plass, New York. File the ends of the band on opposite sides, to form two wedged-shaped ends, having a lap of say 3/4 inch long, which, when laid with their beveled and filed sides together shall form a good joint of the same thickness as blade. Now clamp the ends on a piece of board, with the back of the blade toward you, with the lap brought fair together, and see that the back of the blade is straight. Cut a piece of "silver solder," large enough to cover the lap, lay it between the lapped portion with a little pulverized" borax." Now, having a piece cut out of your board, say three inches wide, directly under your lap, heat your soldering tongs to a bright cherry red,” and hold them pinched firmly on the lap until the solder flows freely from under the joint, then cool off the tongs and soldered portion of saw by pouring water upon the same, without relieving the pressure, until nearly cold. Try a file on both sides of the blade, and should it be harder than the other part of the blade, reheat your tongs a little, and draw the temper by pressing the tongs upon the hard portion of blade till partially heated, but not upon the lap, as it will weaken your joint. File off the solder and joint to the same thickness as other parts, and the soldering of your band is completed. CEMENT FOR LEATHER BELTING. Take of common glue and American isinglass, equal parts: place them in a boiler and add water sufficient to cover the whole. Let it soak 10 hours, then bring it to a boiling heat, and add pure tannin until the whole becomes ropey or appears like the white of eggs. Apply it warm. Buff the grain off the leather where it is to be cemented; rub the joint surfaces solidly together, let it dry a few hours, and it is ready for practical use; and, if properly put together, it will not need riveting, as the cement is nearly of the same nature as the leather itself, C. B. ROGERS & CO. MANUFACTURERS OF THE MOST IMPROVED WOOD WORKING MACHINERY FOR Car Builders, Cabinet Makers, Sash and Blind Work, JAMES S. NASON, WAREROOMS, 109 LIBERTY ST., NEW YORK. Manufactory, Norwich, Conn. WALTER R. WOOD & CO. MANUFACTURERS and IMPORTERS OF GRINDSTONES, Nos. 283 & 285 FRONT STREET, (Established 1840.) NEW YORK. Quarries at Berea, Amherst and Independence, Ohio. PRICES MADE FOR DIRECT DELIVERY. Nova Scotia, New Castle, French and Ohio Grindstones, SCYTHE STONES, FAMILY GRINDSTONES, &c. AT OUR NEW YORK YARD, RULES FOR CALCULATING THE SPEED OF DRUMS AND PULLEYS. (Furnished by Jas. S. Nason.) PROBLEM NO. I.-The diameter of the driven being given, to find its number of revolutions. Rule-Multiply the diameter of the driver by number of its revolutions, and divide the product by the diameter of the driven, the quotient will be the number of revolutions of the driven. PROBLEM NO. II.-The diameter and revolutions of the driver being given, to find the diameter of the driven that shall make any given number of revolutions in the same time. Rule-Multiply the diameter of the driver by its number of revolutions, and divide the product by the number of revolutions of the driven; the quotient will be its diameter. PROBLEM No. III.-To ascertain the size of the driver. Rule-Multiply the diameter of the driven by the number of revolutions you wish it to make, and divide the product by the revolutions of the driver; the quotient will be the diameter of the driver. WEIGHT OF GRINDSTONES. RULE: Square the diameter (in inches), multiply by thickness (in inches), then multiply by decimal .06363. Example: Find the weight of a stone 4 feet 6 inches diameter and 7 inches thick. 4 ft. 6 in. 54 inches; square of 54-2916; multiplied by 7-20412; mulplied by .06363—Ans., 1298.815 lbs., which is weight of stone. ATLANTIC STEEL WORKS, MANUFACTURERS OF ALL DESCRIPTIONS OF CAST STEEL. 104 CENTre Street, NEW YORK. Telegraph Engineer. MANUFACTURER OF INSTRUMENTS, BATTERIES, AND Telegraph Material and Supplies OF EVERY DESCRIPTION. Chester A IT legraph Wire, unquestionaly the toughest and best Galvanized Iron Wire in the American market. Test-twenty-one full turns to a length of six inches. Office and Magnet Wires of any size, in any desired quantity. Screw Class Insulators. Brackets and Pins, at very low rates. Submarine Cables of the Celebrated Kerite Wire. Exclusive Agents of Day's Kerite Wire, for Office, Air, Submarine use; the best insulated and most durable wire in the world. Illustrated Catalogues, embracing a large amount of new matter and Price Lists for 1873, now ready. P. O. Box 2766, New York, |