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US Patent: 851
Machinery for manufacturing double-twist screw-augers
Richard N. Watrous - Chester, CT
Ezra L'Hommedieu - Chester, CT

USPTO Classifications:
72/95, 76/102, 76/2

Tool Categories:
woodworking machines : specialty machines : tool making machines


Not known to have been produced

Stephen L'Hommedieu
Julia L'Hommedieu

Patent Dates:
Granted: Jul. 24, 1838

Reissue Information:
Reissued as RE72 (Jul. 30, 1845)

Patent Pictures:
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The May 1, 1852 issue of Scientific American carried this tidbit: "On the petition of Ezra L'Hommedieu, of Chester, Conn., praying for the extension of a patent granted to him, for an improvement in machinery for manufacturing double twist screw augers, for seven years from the expiration of said patent, which takes place on the 24th July, 1852."

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