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Title: |
1859 Article-Cresson & Hubbard, Knowles Metal Bar Cutter |
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Source: |
Scientific American, V 1 #199, 05 Nov 1859, pg. 297 |
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Insert Date: |
8/1/2019 7:17:52 PM |
IMPROVED METAL BAR CUTTER.
A perspective view is given in the annexed cut of a light and compact machine for cutting off iron bars, which would seem to be indispensable in every establishment where heavy iron-work is done.
It consists of a cast-steel tool, A, with a cutting-edge 3/16 of an inch in thickness, which is forced through the iron bar by the lever, L, planing off a shaving at each stroke. The tool runs through a slide to which a vertical motion is given by the screw, 8, the screw being turned by the ratchet-wheel, W. As the main lever is drawn back, a projection from the lower end of it beneath the fulcrum presses against one end of a short lever, pushing, it forward and drawing the other end of the short lever backward, thus working a rod which is attached to the further end of the short lever, and which, by a hook at its end, turns the ratchet-wheel, and thus feeds down the cutting-tool, the rod being drawn forward by a spiral spring. The amount of the feed is adjusted by means of a vertical rod which has a crank at each end, the lower crank pressing against the rod and thus allowing a greater or less hold upon the ratchet-wheel in proportion as it is turned by means of the upper crank, C.
A machine weighing 120 pounds will cut off a bar four inches square, of course leaving the ends perfectly square and smooth. One man does the whole work without the aid of any striker, in about half the time required to heat the bar, and about an inch of the iron is saved.
We have seen this machine in operation, and for the small amount of power required to operate it, we think it the best machine for the purpose.
The patent for this invention was granted to Daniel R. Knowles, of Center Groton, Conn., Sept 21, 1858 (#21,567) and the machines are made by Cresson & Hubbard, of Philadelphia, Pa., to whom inquiries for further information may be addressed.
http://datamp.org/patents/displayPatent.php?number=21567&typeCode=0 |
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1859 Cresson & Hubbard, Knowles Metal Bar Cutter
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