Depth Sounder

Walker, Thomas F.

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).