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US Patent: 1,308,988
Ratchet Extension for Micrometers
Patentee: Louis Lowenstein (exact or similar names) - Detroit, MI USPTO Classifications: 33/815, 33/828 Tool Categories: layout tools : measurement gauges Assignees: None Manufacturer: Not known to have been produced Witnesses: Karl H. Butler Anna M. Dorr Chas. W. Stauffiger	Patent Dates: Applied: May 16, 1918 Granted: Jul. 08, 1919 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
Description: This is an improved design for a ratcheting collar on the end of a micrometer shaft, allowing it to be more easily manipulated with one hand.

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