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Manufacturers Index - EX-CELL-O Machine Tools, Inc.

EX-CELL-O Machine Tools, Inc.
Sterling Heights, MI, U.S.A.
Manufacturer Class: Wood Working Machinery & Metal Working Machinery

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
1,708,491 Apr. 09, 1929 Method of finishing ball bearings Carroll R. Alden Detroit, MI Ex-Cell-O made high-speed grinding spindles that required great precision in manufacture. The innovation in this patent involves "running in" the bearings during the manufacturing process as a way of ensuring the balls are the same size and the running-in wear properly accommodated. A watt-meter is used to monitor power draw during the running-in process and the end-pressure is increased over time to keep the wattage roughly constant. The end-pressure mechanism eventually bottoms out, indicating that the bearings are nearly sufficiently worn in. After that, the running-in process is complete when the watt reading drops to a set value. During the running-in process the bearings are filled with a mixture of 20 oz. of jeweler's rouge (finely divided iron oxide) per quart of mineral oil.
This patent was further improved in patent 2,460,472.
1,864,707 Jun. 28, 1932 Slip bushing Carroll R. Alden Detroit, MI Ex-Cell-O claimed to have created the concept of the standardized drill bushing; they dominated that market from the mid-1920s and for some years afterwards. This patent covers a bushing design "without recesses wherein dirt and chips may gather". In addition, the bushing may be turned in either direction to lock the two pieces together.
2,000,553 May. 07, 1935 Machine tool Carroll R. Alden Detroit, MI
2,012,677 Aug. 27, 1935 Spindle structure Carroll R. Alden Detroit, MI The innovation in this spindle is to vary the number and size of the bearing balls, which was found to nearly eliminate helical tracks caused by vibrations in the spindle. The ball bearing assemblies are used in pairs. The illustration shows a spindle with three pairs of bearings: the tool-end bearing has 22 balls, and the immediately adjacent bearing has 21; the intermediate pair of bearings has 22 and 19 balls; the third pair of bearings have 14 balls in each. In addition, the spindle diameter is varied between each pair of bearings to further improve surface finish.
2,111,299 Mar. 15, 1938 Magnetic Sine Table Omer E. Robbins Detroit, Wayne County, MI This Magnetic Sine Table was also patented in France, #828,200. The French patent was on a Sine-Magnetic Chuck manufactured by the Ex-Cell-O Corp.
828,200 May. 11, 1938 Magnetic Sine Table Omer E. Robbins Detroit, Wayne County, MI This patent was on a Sine-Magnetic Chuck manufactured by the Ex-Cell-O Corp.
2,351,773 Jun. 20, 1944 Device for Determining Angles Hans J. Lovenston Detroit, Wayne County, MI This patent was on a Sine-Magnetic Chuck manufactured by the Ex-Cell-O Corp.
2,375,255 May. 08, 1945 Hydraulic Transmission for Machine Tools Ira J. Snader Detroit, Wayne County, MI
    Hydraulic Transmission for Machine Tools Max A. Mathys Detroit, Wayne County, MI  
2,937,732 May. 24, 1960 Linear Indexing Mechanism Samuel G. Brady Bloomfield Township, Oakland County, MI
2,960,804 Nov. 22, 1960 Machine for Grinding the Back-Off from the Cutting Edges of Tools of the Broach Type Samuel G. Brady Birmingham, Oakland County,, MI
3,024,577 Mar. 13, 1962 Helical Gear or Spline Grinder Samuel G. Brady Birmingham, Oakland County,, MI
    Helical Gear or Spline Grinder Wilhelm Dralle Detroit, Wayne County, MI  
3,038,280 Jun. 12, 1962 Internal Stock Divider Wilhelm Dralle Detroit, Wayne County, MI
3,061,935 Nov. 06, 1962 Instrument for Determining Angles James T. De Witt Detroit, Wayne County, MI This patent was on a Sine-Magnetic Chuck manufactured by the Ex-Cell-O Corp.
3,169,416 Feb. 16, 1965 Boring head and method of using same Friedrich H. Burkhardt , Germany
    Boring head and method of using same Ernest Carlson Birmingham, MI  
3,194,751 Jul. 13, 1965 Electrolytic Grinder Wheel Samuel G. Brady Birmingham, Oakland County, MI
3,516,149 Jun. 23, 1970 Machining Apparatus with Automatic Tool Changing Means George Mickas Gross Point Woods, Wayne County , MI