US Patent: 1,540,388
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Portable saw
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Patentee:
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John M. Crowe (exact or similar names) - Covington, KY |
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Patent Dates:
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Applied: |
Apr. 19, 1923 |
Granted: |
Jun. 02, 1925 |
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Jeff Joslin Vintage Machinery entry for Skil, Inc. Vintage Machinery entry for Ingersoll-Rand Co. Vintage Machinery entry for Crowe Mfg. Corp.
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Description: |
This patent date was seen on a pneumatically-powered circular saw from Ingersoll-Rand Co. This patent date was also seen on a circular saw from Skilsaw, Inc.; the other patent dates on the saw spanned 1914 to 1925, "other patents pending".An article in the May 1927 "Railway Engineering and Maintenance", page 218, describes Ingersoll-Rand Co.'s "New Air-Driven Portable Hand-Saw". The saw "consists essentially of an Ingersoll-Rand three-cylinder type air motor, a circular saw blade and a Crowe safety saw guard, together with suitable hand grips..." The saw was intended for cutting wood, soapstone, bakelite, wall-board, cable and copper. A variety of blades were available. The speed of cutting was claimed to be 20 times as fast as by hand-power. It was available in sizes to accommodate blade diameters of 6, 8 and 12 inches. |
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