US Patent: 192,423
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| Tap Wrench
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Patentee:
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| Charles Elterich (exact or similar names) - New York, NY |
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Patent Dates:
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| Applied: |
Dec. 27, 1876 |
| Granted: |
Jun. 26, 1877 |
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Patent Pictures:
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Charles Elterich patent June 26, 1877 |
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Stan Schulz
"Vintage Machinery" entry for Charles Elterich
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Description: |
| The patent claims the hollow split shank, tapering threaded tip and corresponding internally tapered threaded nut. This forms a wrench which would firmly grip threading taps or broaches.
A known example marked "ELTERICH & BRIGGS PAT. JUNE 26, 1877" has a straight wooden handle and presents as more of a "pin vise."
A June 24, 1909 AMERICAN MACHINIST article (pg. 1062 ) noted Charles Elterich was still in business making customized taps and dies in New York City. The article includes mention and description of this four jawed tap wrench. |
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