A machine for wiring both blind-rods and their slats at one operation is shown in Fig. 2. The slat is placed on the upper bell, and by an upward motion of the lever the staple is driven in. Then the same slat is placed on the lower bed, and a downward motion of the same lever staples the slat to the rod. The staple cut-off is so arranged that two staples cannot get under the driver at the same time. Saw Gil miner : see Grinding Jlachiues. Saw, Pik...cutting : see l'ilo Driving. SAWS. METAL WORKINI;. Cold Saw machines for cutting iron, steel, and other metals while in avoid state have come into use during the past few years. They are probably more commonly used in Europe than in this country at present, but the Newton Machine Tool Works, of Philadelphia, have recently put on the market a full line of these machines of various styles, and their more general use may be anticipated. Several styles of cold saw cutting-off machines built at the above-named establishment are shown in Figs. 1 to 4.
Circular 1 is a machine designed to cut off round or square bars imp to 4 in., and beams up to 16 in. in depth. The saw or mill cutter is 18i in. in diameter. It has a variable automatic feed, ranging from in. to ins. per minute, with power quick return, with automatic stop in both directions.
Fig. is a machine designed for trimming the edges of armor plate after it comes from the rolls. The machine will cut work up to 10 in. in height and 13 ft. long. It is built so that it can be used as two in dependent machines, or can he adjusted to take in work be tween saws 20 ft. in width. The work tables are made nar row so that the two machines can be brought together within 30 in. of the saws. The work table of the adjustable head can be removed, so that work of the width of 15 in. can be cut, both sides at one time. To support the miter end of the armor plate, the entire machine is provided with a table planed the same height as the work table on the machine, and if the plate is wider than the clamps will admit, it can be clamped with bolts on the outside work table. The clamps can be readily re moved for convenience in set ting work. The machine is set on cast-iron girders, allowing one head to be adjusted by pow er in and out from the station ary head. The sawsof the ma chine are 36 in. in diameter.
Fig. 3 is a cold sawing machine which is set on a turn-table, and driven from the central point underneath the bed, so that it can be swung around at any angle. The advantage of this tool for heavy work lies in economy of shop space.
Fig. 4 is a machine for cutting round, square, and flat bar. The work to be cut off is laid on the work table and clamped. The saw is then fed down through the bar, cut ting off the same a s on the ordi nary machine. Tolubricate the saw, the machine is furnished with a small pump and con nections, throwing the lubri cant on both sides of the saw. The machine has four changes of feed, with quick return by hand. The arm of the saw is counterweighted to overcome any tendency which the weight of the arm would have to press the saw against the work, as it is necessary for the success of these machines to feed them positively, and not in any way by any gravity contrivance. The saw being fed in this manner can be forced into the work, and the work cut off very quickly. The machine can be used not only for cutting off bars of iron and steel, but also for cutting off small beams, making the cuts square, and can be used on beam work to any angle within the range of the machine.
Saw Grinder.—Fig. 5 shows a grinding machine furnished by the Newton Machine Tool Works, for grinding the teeth of the saws of their cutting-off machines. The saw is placed on the arbor, and the saddle is adjusted to suit the diameter of saw ; the emery wheel, the face of which is given the profile of space between teeth, will then, when passed over the saw, grind the face and top of tooth at one time. The spring trigger, or catch, is set to suit the tooth of saw, which is revolved by hand, one tooth at a time, the trigger guiding the saw. When the saw is ground in this manner, it will always retain the shape of tooth, and keep the saw round.
Horizontal Circular Saw.—Fig. 6 represents a cold sawing machine, designed by Messrs.
Tsaae I1111 & Son, Derby, England, and used principally for the sawing of runners or gates of steel castings. The saw is caused to revolve in a horizontal plane, and in the ease of the machine illustrated it may be raised to 3 ft. 6 in. The machine carries a 28-in. diameter saw, having a longitudinal trav el of 16 in., and will cut solids up to 8 in. thick. The saw is secured to the spindle by a flush side arrangement, while the driving is by a type of gearing dispensing with the usual worm and worm-wheel, The feed is self-acting, of three speeds, and suitable for sawing solids, for quick return motion, and for disengaging motion, there being an automatic gearing for disen gaging the gear clutch at any point in the forward or return traverse. The slide bed upon which the saw-carrying saddle moves has a traverse slide which fits the standard. The raising or lowering is done by hand through a worm and worm wheel, by a wire rope carried on suitable carrying pulleys on a drum ; while the exact low ering or raising adjustment of the saw is done by means of a telescopically arranged spin dle. The driving is from the main shaft onto pulleys on an overhead shaft carried in bear ings across the top of the ma chine. Upon this latter shaft is a bevel pinion, which gears with a bevel wheel supported on a bearing as shown, this bevel wheel communicating mo tion by a feather key to the vertical shaft, which can slide through it. On the low part of this shaft is secured a bev el pinion, which gears with a bevel wheel on the principal shaft of the sawing portion of the machine.
Band Saw.—Fig. 7 shows the Newton band sawing machine, which can be used to advan tage in cutting the center out of cranks, connect ing rods, piston rods, eccentric rods, pump levers, etc., and for cut ting curved or irregular work, where it can be guided by hand. The machines have a large stationary work table, the rear section of which is made so that it can be moved away from the saw, so that the saw can be removed from the pulleys. The automatic feed table is inserted in the station ary table. The saw wheels are covered with a rubber tire, and the bottom wheel runs in a bath to lubricate and cool the saw. The upper wheel is provided with a suspended hearing, with attached weight to keep the saw at a proper tension. The saw passes between two guides and presses against a wheel which revolves with the saw, thus reducing the friction. The lower saw guide is inserted in the table, and the upper guide can be raised and lowered to suit the various depths of work.