Taffrail Log Recorder, Patent Model
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| Caption | This high-quality working example of a Taffrail Log was submitted to the US Patent Office when John Edward Massey, its British inventor, applied for a patent in 1877. This two-part mechanical log measures a vessel's speed though the water. The four-bladed rotator is towed astern and registers the distance traveled and speed on an integral dial. Closer to the ship, or even mounted to the ship's rail, a second mechanism measures rotations of the towing rope to record the same information. The rotator must be hauled in to be read, but the second log can be monitored while the first is still in operation. Date: 1870s. Record ID: nmah_843874. |
|---|---|
| Creator | Edward E Massey, maker |
| Artwork medium | unknown |
| Credit | National Museum of American History |
| Terms of use | Public Domain Dedication (CC0 1.0) |
| Search stock images by keyword | Taffrail Log Recorder Patent Model high-quality working Taffrail Log Patent Office John Edward Massey British inventor applied patent Patents Transportation Models Edward E Massey |
| Stock image ref | Size | Views |
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| YAH000515 | 4,288 x 2,848 pixels | 0 |
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