Model of an Optical Telegraph, Model of an optical telegraph on a base. It consists of two posts at the top connected by an axis around which an arm rotates, the two ends of that arm have two narrow arms attached, one with a counterweight, the other without. The main arm is moved by a rope running over two discs on one side of the posts, the outer arms are moved with hoists running over a drum between the posts and placed on cleats against the posts. In the rectangular positions with respect to the main arm, the outer arms can be fixed with a spring. 1:22 scale (scale on model)., anonymous, c. 1794, wood (plant material), brass (alloy), ivory, total: h 48.5 cm foot: w 23.3 cm × d 15.6 cm radius of main arm: l 27 cm radius of wings: l 23 cm h 79 cm × w 27.5 cm × d 21.5 cm
Keywords:
Model, Optical Telegraph, optical telegraph, base, consists, two posts, top connected, axis, arm rotates, two ends, arm, two narrow arms attached, counterweight, main arm, moved, rope running, two discs, side, posts, outer arms, hoists running, drum, placed, cleats, rectangular positions, respect, fixed, spring, 1, 22 scale, scale, model, c, 1794, wood, plant material, brass, alloy, ivory, total
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