US Patent: 183,397
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| Improvement in mitering-machines
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Patentee:
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| Leonard D. Howard (exact or similar names) - St. Johnsbury, VT |
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Patent Dates:
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| Applied: |
Jul. 31, 1876 |
| Granted: |
Oct. 17, 1876 |
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Jeff Joslin
Vintage Machinery entry for L. D. Howard
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Description: |
| This tilting-arbor sliding table saw design uses a "trunnion" on the outboard end of the arbor, which is moved to adjust the angle. The end of the arbor nearer the blade pivots about a shaft. A pulley on the shaft receives power via a flat belt from a large pulley at the rear (outfeed) of the saw, an arrangement that did not work well because as the saw was tilted the belt would get tighter on one edge and looser on the other, which led to the belt migrating off the arbor pulley. We are told that most users gave up on tilting the blade and kept it at right angles to the top so that the belt tracked properly.Like all other tilting-arbor designs of the day, the Howard patent saw was ultimately obsoleted by John Connell's 1878 invention of the tablesaw trunnion that maintained a fixed line of intersection between the tabletop and one surface of the tilting sawblade; see patent 210,100. But it took a while for the superiority of the Connell design to be understood and in the meantime L. D. Howard had good success with his saw. |
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