Ex-Cell-O Machine Tools, Inc. - Assigned Patents

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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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.
2,179,573	Nov. 14, 1939	Retractable Tool and Holder Therefor	Ray B. Criddle	Detroit, Wayne County, MI
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
2,460,472	Feb. 01, 1949	Process for improving the surface of form ground races	Harold N. Seyferth	East Detroit, MI	The patent relates to reducing chatter when form-grinding the races, a step that precedes the Alden finishing method of patent 1,708,491.
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	Baden-WÃ¼rttemberg,, Germany
		Boring head and method of using same	Ernest Carlson	Birmingham, Oakland County, 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