US Patent: 590,730
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| Barrel Tapping Wrench
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Patentees:
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| Charles E. Swingle (exact or similar names) - Luzerne, PA |
| Charles Frantz (exact or similar names) - Luzerne, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 24, 1896 |
| Granted: |
Sep. 28, 1897 |
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Patent Pictures:
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Charles E. Swingle and Charles Frantz patent Sept. 28, 1897 |
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Stan Schulz
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Description: |
| The wrench has elastic or resilient lining for a friction fit to the tapping tube that passes through the central axis of the wrench.
The wrench tightens a packing nut which compresses a seal around the outside of the tapping tube. |
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