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Title: |
1884 Article-R. L. Orr & Co., Ltd., Saw Gummers |
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Source: |
Engineering Mechanics, V5, 23 Feb 1884, pg. 142 |
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Insert Date: |
11/28/2018 11:17:48 AM |
The accompanying cuts illustrate the “Standard” and “I X L” saw gummers, manufactured by R. L. Orr & Co., Limited, of Pittsburgh. The “I X L” saw gummer, which is represented in Fig. 1, while newer, is the simpler of the two and is designed for a low-priced, reliable machine. The gummer is attached by clamps to the saw to be gummed or cut and adjusted at the proper angle by means of tail-rod, 3 and sliding tail-clamp, 4. The carriage is indicated by 1 and on its lower end, immediately against the tooth of the saw, is seen the cutter. The spring, 5, holds down the carriage and thereby keeps the cutter close against the tooth to be gummed, motion being imparted to the cutter by revolving the crank at the side by the hand. As the gumming or cutting progresses, the cutter is fed up to the tooth by turning the hand wheel, 2, which must be kept revolving slowly by the left hand, while the right turns the crank.
In the "Standard" gummer, illustrated in Fig. 2, the parts are the same, with the exception that the spring is replaced by a cushion, 5, and an automatic feeding apparatus, by which the cutter is fed steadily up to the tooth, and both hands are left free to give the necessary power, an additional crank being put on for this purpose. Fig. 3 shows the cutters used on the gummers, with the manner in which the teeth are inserted.
Numerous advantages are claimed for these gummers, not the least of which is that of uniformity in cutting. By means of the tail-rod and clamp and an arrangement by which the action of the cutter can be stopped at any desired point, the depth of cut can be regulated exactly, and each tooth gummed to precisely the same extent. Other advantages claimed are the adaptability to any kind of saw, upright or circular, large or small; the ease with which new teeth can be placed in the cutter; the adjustable feed, and the fact that the back of one tooth may be cut off and the throat of the next gummed out without readjustment. The manufacturers also claim great things for these gummers as to economy of labor and machinery. It is stated that, as compared with file work, the ability of one man is increased thirty-fold by the use of a gummer, and that a very large saving of cutters is effected by their use. The machines are highly recommended, and their success during the few years they have been on the market augurs I well for their satisfactory qualities. |
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1884 R. L. Orr & Co., Ltd., IXL Saw Gummer
1884 R. L. Orr & Co., Ltd., Standard Saw Gummer
1884 R. L. Orr & Co., Ltd., Cutters Used on Saw Gummer, Fig. 3
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