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Mechanical Log

Catalogue number:
1979.0786.01.01

Inscriptions:
"WALKER’S HARPOON SHIP LOG PATENTED 18^TH SEP^TR 1866"

Discussion:
Thomas Walker obtained a British patent for his "Harpoon" log in 1861 and an American patent in 1866. The three dials of this example register 100 miles by 10s, ten miles by miles, and one mile by quarters.

Ref: T. F. Walker, "Apparatus for Indicating the Speed of Vessels," U.S. patent #58,189.

Further Information:

Walker
Log