US Patent: 941,492
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Rule
Combination Rule, Square and Protractor
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Patentee:
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| Patrick F. Burns (exact or similar names) - Nisbet, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 18, 1908 |
| Granted: |
Nov. 30, 1909 |
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Ralph Brendler
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Description: |
| This tool implements the by now standard combination of ruler-based tools (square, bevel, plumb, etc). The new feature here is the addition of two sliding brass "feet" that fill in the corner of the square.
While these will fill in the corner as specified, they introduce a new problem- the edge of the rule now has a "dip" in it, rendering it a pretty poor square. |
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