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Manufacturers Index - Henry G. Thompson & Son
Patents
This page contains information on patents issued to this manufacturer.

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USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
7,311 Apr. 23, 1850 Lathe for turning a peculiar species of curve Henry G. Thompson New York, NY
499,227 Jun. 13, 1893 Hack Saw Frame Fred E. Horne Maiden, MA Two piece frame to allow use of different sized blades. Two overlaping pieces with holes and corresponding locking pins for rigidity and fixing the length. Known example marked with patent and 2 Jun 1896 patent (561353).
561,353 Jun. 02, 1896 Saw Frame Adolphus Gaylord Snell New Haven, CT A clamp is used at the end of the saw in connection with the normal protruding pins to secure the blade and prevent stretching and failure. Know example is marked with the patent date and a 13 Jun 1893 patent (499,227).
935,665 Oct. 05, 1909 Hacksaw-machine Herbert D. Lanfair New Haven, CT This patent date was seen on a No. 4 power hacksaw from Henry G. Thompson & Son Co., which was the "Milford" model.
939,976 Nov. 16, 1909 Lathe-tool holder James Carr Syracuse, NY
    Lathe-tool holder William Carr Syracuse, NY  
1,033,875 Jul. 30, 1912 Tool Holder James Carr Syracuse, Onondaga County, NY Crosby and Gregory - patent attorneys
1,045,512 Nov. 26, 1912 Tool-holder for planers and other machine-tools James Carr Syracuse, NY
1,045,813 Dec. 03, 1912 Tool Holder James Carr Syracuse, Onondaga County, NY
1,146,572 Jul. 13, 1915 Power Hacksaw Thomas Humpage , England
1,461,004 Jul. 03, 1923 Hack-saw machine of the continuous-band type Charles Napier Springfield, MA
1,596,033 Aug. 17, 1926 Metal-cutting band-saw machine William Swain Smith New Haven, CT
    Metal-cutting band-saw machine Arthur Graham Thompson New York, NY  
1,623,449 Apr. 05, 1927 Metal-cutting machine Arthur Graham Thompson New York, NY An undated catalog from the Racine Tool & Machine Co. states that this patent was used under license from Henry G. Thompson and Son Co. This invention provides improvements to patent 1,596,033.
2,549,384 Apr. 17, 1951 Band saw machine Joseph Anthony Krolikowski New Haven, CT This unusual saw is reminiscent of Lemuel Hedge's 1851 patent 8,056. This particular saw is intended to use high-speed steel blades, which had proved to be good for reciprocating hacksaw machines but could not handle the flexing when used to make bandsaw blades. This patent claimed "to achieve unusual and markedly successful and useful results." Like the Hedge patent, the idea is that the blade is never bent when under tension, which apparently greatly reduced blade breakage.
    Band saw machine Michael Joseph Radecki Hamden, CT