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patent log

[ pat-nt lawg, log ]

noun

, Nautical.
  1. any of various devices for determining the speed of a ship by means of a vaned rotor streamed at the end of a logline upon which it exerts a torsion transmitted to a registering device on board.

patent log

noun

  1. See chip log
    nautical any of several mechanical devices for measuring the speed of a vessel and the distance travelled, consisting typically of a trailing rotor that registers its rotations on a meter Compare chip log

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Word History and Origins

Origin of patent log1

First recorded in 1875–80

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Example Sentences

The dial of the patent log tinkled periodically in the dark at the end of the ship.

The ocean was all right, and so was the patent log; as for speed, one saw it with his own eyes.

"Well, come and see me set the patent log," said Captain Whitby.

And after consultation with a signal boy, who came aft to read the patent log, we found that we were heading for that island.

The mechanism of the patent log hummed and clicked more obtrusively.

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