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Manufacturers Index - Davis & Thompson Co.
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
1,213,340 Jan. 23, 1917 Gas-engine Frank M. Davis Milwaukee, WI
1,279,286 Sep. 17, 1918 Duplex Milling Machine Frank M. Davis Milwaukee, Milwaukee County, WI R. S. C. Caldwell - patent attorney
1,366,770 Jan. 25, 1921 Gearing Frank M. Davis Milwaukee, WI "The object of the invention is to provide a simple and effective means for taking up the back-lash on worm gearing and is particularly useful on machines where accurate work is done."
1,376,861 May. 03, 1921 Universal duplex milling-machine Frank M. Davis Milwaukee, WI "This invention relates to duplex milling machines operating simultaneously on opposite faces of the work as the latter is carried between the cutters on a rotating table, and has for its object to provide such a machine adapted for universal use or for the varying requirements of large machine shops engaged in quantity production of parts of different sizes and shapes."
1,415,530 May. 09, 1922 Feeding and clamping means for metal-working machines Frank M. Davis Milwaukee, WI
1,545,744 Jul. 14, 1925 Milling Machine Frank A. Davis Milwaukee, Milwaukee County, WI Claim:
In a milling machine, the combination of a frame, a housing mounted thereon, a rotating work mandrel journaled in said housing, a rotating spindle journaled in said housing, the housing having an integral bridge section between the mandrel and spindle whereby the spindle's center is fixed with relation to the center of. said work mandrel, and a milling cutter on said spindle operable upon the work carried by said mandrel.
1,782,138 Nov. 18, 1930 Continuously-operating multiple lathe Albert C. Hoeh Pontiac, MI
    Continuously-operating multiple lathe Frank M. Davis Milwaukee, WI  
1,877,560 Sep. 13, 1932 Vertical Continuous Milling Machine Frank M. Davis Milwaukee, Milwaukee County, WI Claim:
A vertical continuous milling machine, comprising a vertical standard, a tool carrier journaled thereon and having a plurality of circumferentially spaced and vertically movable spindles, tool shafts rotated by the spindles and extending at an angle thereto, workholding means turning with the carrier, guide means for said tool shafts coacting with* said workholding means, means for moving the tool shafts towards and away from the work in successive order as the carrier revolves around the standard, milling cutters carried by the tool shafts, and means for rotating the spindles.
2,033,686 Mar. 10, 1936 Multiple operation machine Frank M. Davis Milwaukee, WI
2,065,173 Dec. 22, 1936 Milling machine spindle mounting Frank M. Davis Milwaukee, WI
2,203,943 Jun. 11, 1940 Machine tool spindle mounting Frank M. Davis Milwaukee, WI
2,364,884 Dec. 12, 1944 Work clamping means for machine tools William H. Weimer North Prairie, WI Invention improves on a band clamp used to hold the work on a milling and drilling machine; the improvements include providing a wide range, to minimize pressure variations, and a simpler release mechanism, among other improvements.
429,985 Sep. 11, 1945 Machine tool work clamping means William H. Weimer North Prairie, WI
2,424,524 Jul. 22, 1947 Boring machine William H. Weimer North Prairie, WI This invention allows the boring machine to bore a hole of non-circular cross-section. For example, a tubular workpiece with a longitudinal welded joint may have a bore with a flattened portion at the joint to provide extra wall thickness there. This boring machine can also vary the boring diameter along the length of the bore.
2,529,205 Nov. 07, 1950 Machine tool chuck William H. Weimer North Prairie, WI This chuck is intended for holding cylindrical workpieces, especially tubes, where even pressure is required to firmly clamp without distorting the workpiece.
2,568,136 Sep. 18, 1951 Engine starter William H. Weimer North Prairie, WI The inventor was president of machine-tool maker Davis & Thompson Co. It is not know why he patented an engine starter for a company, the Air Diesel Engine Corp., 300 miles distant from him. The only mentions of the assignee we could find anywhere on the Internet were in relation to this patent.
2,697,952 Dec. 28, 1954 Continuously operating machine tool Gerhold L. Otto Menomonee Falls, WI
2,699,856 Jan. 18, 1955 Overload release clutch Walter L. McCann West Allis, WI
2,701,482 Feb. 08, 1955 Milling and center-drilling machine Gerhold L. Otto Menomonee Falls, WI This is a combined machine for milling and center-drilling a workpiece such as a shaft of some kind.