Coin Operated Spring Testing Wrist Machine

This wrist machine features a handle spring fitted to test the wrist tension of any personnel. Machine indicates spring resistance, after a coin is inserted. This spring device has a body constructed to represent the figure of a man.

Keywords

wrist machine, human figure, Coin operation, spring testing, handle movement

Galleries

Amusement Park

Source

Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)

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