Quadrant, Two almost identical clinometers to measure the maximum slope of a swinging ship. Both are brass, mounted on a wooden back plate with the center of the bow at the top. The scale on the arc runs from 0 ° to 45 ° each side. The outer edge of the arc is toothed, each side in the opposite direction. The two hands have catches on the back, which engage in the teeth: they can only move outwards along the arch. The catches can be released by hand to bring the hands back to 0 °. A slight interruption of the ratchet edge prevents the hands from falling into each other's eighth of the arc. The teeth of one quadrant (a) divide the arc into quarter degrees, those on the second (b) into half degrees. The hands on the first quadrant (a) run over the protractor with small rolls. As the ship swayed, each pointer flew out to the side where the ship tilted and indicated the maximum slope. [combined description], Jan Marten Kleman (mentioned on object), Amsterdam, 1793 - 1808, wood (plant material), brass (alloy), h 25.5 cm × w 32.2 cm × d 3 cm
Keywords:
Quadrant, Two almost identical clinometers, measure, maximum slope, swinging ship, brass, mounted, wooden back plate, center, bow, top, scale, arc runs, 0 °, 45 °, side, outer edge, arc, toothed, opposite direction, two hands, catches, back, engage, teeth, move outwards, arch, released, hand, bring, hands back, slight interruption, ratchet edge prevents, hands, falling, s eighth, quadrant, divide, quarter degrees, second, b, half degrees, first quadrant, run, protractor, small rolls, ship swayed, pointer flew out, ship tilted, indicated, Jan Marten Kleman, mentioned, object, Amsterdam, 1793, 1808, wood, plant material, alloy
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