Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 229
840. SOUNDING WEIGHT RELEASE for deep-sea sounding. A hollow spindle attached to the sound-ing-line encloses a hook lever, sprung out by a spring.A spindle, with an impact head, slides behind the leverand releases the ball at the moment the head strikesthe bottom. 841. SAMPLER SOUND-ING WEIGHT.—The… … 842. Cups closed.
Mechanical movements
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