US Patent: 945,901
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| Screw-cutting attachment
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Patentee:
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| Frederick E. Anthony (exact or similar names) - Providence, RI |
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Patent Dates:
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| Applied: |
Oct. 12, 1906 |
| Granted: |
Jan. 11, 1910 |
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Jeff Joslin
Vintage Machinery entry for Brown & Sharpe Mfg. Co.
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Description: |
| "The invention relates to an attachment for screw-machines, and has for its object to provide an attachment whereby screw-threads of any form, depth or pitch may be rapidly produced. Ordinarily in these machines the screws are cut by means of dies, but there is a limit to the depth and pitch of a screw-thread which can be properly and advantageously cut by a die. Heretofore when it has been desired to produce screws having threads of a greater depth or pitch than could be conveniently cut by a die, it has been customary to cut such screws in a lathe by means of an ordinary lathe-tool. But this involves repeated passes of the tool along the screw-blank, a greater or less number of passes being required according to the depth of the thread to be cut. The object of the present invention is to provide an attachment whereby threads of a depth or pitch which could not be properly cut by means of a die may be rapidly produced and with only a single passage of the cutting tool past the work..." |
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