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US Patent: 535,440
Tool Holder
Patentee: James Armstrong (exact or similar names) - Chicago, Cook County, IL USPTO Classifications: 407/110, 407/83, 407/9 Tool Categories: metalworking machines : metal lathes : lathe tool holders and tool posts Assignees: Armstong Bros. - Chicago, Cook County, IL Manufacturer: Armstrong Brothers Tool Co. - Chicago, Cook County, IL Witnesses: Victor E. Bostrom John A. Christianson G. M. Michaud Hugh J. Armstrong	Patent Dates: Applied: Apr. 30, 1894 Granted: Mar. 12, 1895 Patent Pictures: [ 1 | 2 ] USPTO (New site tip) Google Patents Report data errors or omissions to steward Joel Havens "Vintage Machinery" entry for Armstrong Brothers Tool Co.
Description: Louis K. Gillson - patent attorney The wrench for this toolholder is described in patent #1,732,549.

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