US Patent: 644,125
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| Band sawing-machine
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Patentee:
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| George W. Bugbee (exact or similar names) - Delhi, OH |
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Patent Dates:
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| Applied: |
May 01, 1899 |
| Granted: |
Feb. 27, 1900 |
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Jeff Joslin
Vintage Machinery entry for J. A. Fay & Egan Co.
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Description: |
| This invention "consists in mounting the upper or supporting band-saw wheel of a machine of this character on a knife-edge in such a manner that the tension on the saw-blade is always maintained and inequalities in strain on the blade exactly and instantly compensated for."It consists, further in mounting the upper or supporting band-saw wheel in a lever resting solely on a knife-edge bearing, in connecting the lever with a pressure device, solely through knife-edge bearings, and providing a device capable while acting through the same parts or agencies of compensating for the great and sudden strains to which a band-saw blade is subjected—as, for instance, when the board strikes the blade or when the blade passes through hard or knotty substances or when boards of very uneven thicknesses are fed into the machine—as well as for the slight but ever changing variations in the strain on the blade, due, for instance, to the expansion and contraction of the saw-blade, retaining the blade at a uniform tension and acting as sensitively as a knife-edge balance-scale in compensating for the strain on the blade, whether great or slight, through the same agencies and one in which the largest as well as the smallest band-saw blades can be used without danger of being broken..."This patent date is seen on a Fay & Egan No. 50 bandsaw in a July 1902 ad. |
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