US Patent: 121,088
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| Improvement in Spirit Levels
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Patentee:
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| Leonard Leroy Davis (exact or similar names) - Springfield, MA |
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Patent Dates:
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| Applied: |
Oct. 01, 1870 |
| Granted: |
Nov. 21, 1871 |
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Russ Allen.
Vintage Machinery entry for Leonard L. Davis
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Description: |
| Adjustable feature that allows easy replacement and adjustment of the spirit level. The adjusting screw has an offset recess to accept the vial tube which when turned adjusts the position of the vial.
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