US Patent: 5,915X
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Dog irons
Iron dogs for saw mills
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Patent Dates:
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| Granted: |
Apr. 13, 1830 |
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Jeff Joslin
Vintage Machinery entry for Martin Rich
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Description: |
| Most of the patents prior to 1836 were lost in the December 1836 fire, including this one. The Journal of the Franklin Institute reported on this patent when it was issued. "'The dog star rages,' at least in Tioga county, New York; these dogs, however, are not affected with hydrophobia, as without abundance of water they would remain in a state of quiescence. Mr. Rich obtained a patent for a dog of an improved breed, in February last, since which two, or rather four of his neighbours, have become his competitors, as we have already noticed; he now comes forward with another dog, which we are informed will retain his hold upon a log of wood, without letting go, after once his teeth have been made to enter it."In the dogs patented by Mr. Andrews, No. 14, one of the half bails is made to slide endways upon a square iron bar attached to the head block on one side of the kerf, the bar itself turning on pivots in staples driven into the block. In the present patent, each bail is to be so fixed, that the log may be shifted without loosening the dog. The iron bars are cut into notches, or teeth, on one angle, and into these notches springs fall, to hold the bails in their places. A spring attached to one of the bails falls into notches upon - a strip or bar of iron fastened to the block, at the back of the dog, to aid in gauging the thickness to be cut. These parts are not very clearly described; the drawing, however, is sufficiently well executed, but it is entirely without written references, and thus fails in an important point. We are not told for what the present patent is taken, although the new and the old are manifestly mixed up together in the description." |
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