US Patent: 1,286,525
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| Joint for Folding Rulers
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Patent Dates:
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| Applied: |
Aug. 26, 1918 |
| Granted: |
Dec. 03, 1918 |
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Patent Pictures:
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Russ Allen.
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Description: |
| Movement to an inexpensive method of constructing rule joints. Pointed tips which aid in fixing the joint to the wood and reduce the number of fixing pins to one per hinge. Found on Lufkin rules as well as unmarked rules. Utilized on the Lufkin #651B rule. Fred Buck also patented Lufkin's three fold rule with level 1,120,443 |
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