Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 222
812-813. PIVOTED STEPS for a boat-landing. One edge of each step is pivoted tothe lower stringer, the other edge to the apperstringer by a hanger. On a level the stepsform a floor, as the end of the ladder falls withthe tide the hangers lift the forward edgeof the step to keep it level. The shore…
Mechanical movements
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