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US Patent: 802,489
Speed-changing device
Patentee: Hans Baerbalck (exact or similar names) - Hamilton, OH USPTO Classifications: 192/82R, 74/371 Tool Categories: metalworking machines : drilling and boring : drill presses woodworking machines : wood drilling and boring : drill presses Assignees: Hamilton Machine Tool Co. - Hamilton, OH Manufacturer: Hamilton Machine Tool Co. - Hamilton, OH Witnesses: Arthur Letherby R. S. Carr	Patent Dates: Applied: Nov. 30, 1904 Granted: Oct. 24, 1905 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Hamilton Machine Tool Co.
Description: The 1912 Hamilton Directory lists our inventor, Hans Baerbalck, as a draftsman at the Hamilton Machine Tool Co.

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