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Depth Sounder
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
Thomas Walker (1805-1871) was a mechanic in Birmingham, England, who designed and manufactured apparatus for ships at sea. He submitted this model of a depth sounder to the U.S. Patent Office, along with an application for a U.S. patent. The inscription reads "T. WALKER & SON's PATENT 1148" (the number apparently referring to a British patent issued in 1866).
National Museum of American History’s own descriptionCredit lineDepth Sounder. Walker, Thomas F.. National Museum of American History. CC0.
