US Patent: 956,116
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Gage
Butt and Lock Mortise Gage
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Patentee:
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| Fred Lohman (exact or similar names) - Los Angeles, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 24, 1908 |
| Granted: |
Apr. 26, 1910 |
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Ralph Brendler
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Description: |
| A fascinating little butt gage with several interesting features.
The big new feature here is to use a center marking point for the lock mortise, to help in positioning the drill. It uses the same basic idea as the much earlier Kenny's patent (98,504 - 1/4/1870), with left- and right-handed threads on the main rod. Unlike the Kenny's gage, however, this one uses a very interesting rack and pinion adjustment method, with a separate locking screw.
This feature supposedly offered greater precision in the adjustment, but I don't know if that would overcome its inherent fragility. It is certainly a neat mechanism, though! |
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