US Patent: 1,708,491 - Method of finishing ball bearings


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US Patent: 1,708,491

Method of finishing ball bearings

Patentee:

Carroll R. Alden (exact or similar names) - Detroit, MI

USPTO Classifications:

29/898.13, 451/114, 451/49, 451/52

Tool Categories:

industrial machines : industrial machine mechanisms : industrial machine bearings

metalworking machines : metalworking machine mechanisms : metalworking machine bearings

Assignees:

Ex-Cell-O Tool & Mfg. Co. - Detroit, MI

Manufacturer:

Ex-Cell-O Corp. - Detroit, MI

Witnesses:

Unknown

Patent Dates:
Applied:	Jul. 17, 1926
Granted:	Apr. 09, 1929

Patent Pictures:

USPTO (New site tip)
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Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Ex-Cell-O Machine Tools, Inc.

Description:

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.