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US Patent: 61,902
Improvement in Calipers
Patentee: Andrew V. D. Westervelt (exact or similar names) - New Brunswick, NJ USPTO Classifications: 33/558.06 Tool Categories: layout tools : calipers Assignees: Andrew V. D. Westervelt - New Brunswick, NJ H. Smith, Jr. - New Brunswick, NJ Manufacturer: Not known to have been produced Witnesses: Wm. F. McNamara Alex F. Roberts F. A. Jackson	Patent Dates: Granted: Feb. 05, 1867 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This design uses a worm and wheel to adjust the opening of a pair of calipers.

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