US Patent: 1,430,874
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| Machine for Making Door Butt Mortises
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Patentee:
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| Nelson F. Anderson (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: |
Apr. 12, 1920 |
| Granted: |
Oct. 03, 1922 |
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Ralph Brendler
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Description: |
| This is an incredibly complicated machine designed to automate the cutting of hinge mortises for doors. In use, the machine is clamped to the edge of the door and the four handles are hit with a hammer. The first three mark the edges, the last actually cuts the mortise. |
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