Angle meter, The object consists of the following twelve movable parts: two arms composed of three layers of metal (whereby the middle part of the right arm can be expanded again to an angle of 90 degrees), as well as a third arm which, due to the construction, always remains the bisector of the corner which the other legs make and is perpendicular to it, if these are in line with each other, two connecting parts, one end of which is riveted to one arm and the other end to the slide, which is mounted on the middle arm, five short plates (i.e., visors) which are attached to each end of an arm with a hinge and which can be raised perpendicularly (the sixth on the middle arm is missing). On each plate, which has the circumference of a semicircle at the top with a perpendicular notch, a small round opening is provided in the middle to allow you to see through it. On the left arm the inscription: Pro declinatione muri is engraved, on the right arm the letter D and the year 1582. On the smooth underside of each arm a radius is engraved to the center of the other end from the center of the circular connecting part the numbers 1 to 10. On the middle arm, which rests in closed position on the other two arms, left and right graduations are engraved, going left from 3 to 15 and right from 10 to 90 and then repeated. A round hole is drilled in the left arm near the circular connecting part. The part of the middle arm over which the slider that is mounted and engraved as a brace can be moved has slanted sides towards the bottom, on which also scales are engraved with on the right 0 to 90 and on the left the terms vmbra recta and versa., anonymous, West-Europa, 1582, brass (alloy), l 11.5 cm × w 21 cm × d 0.6 cm
Keywords:
Angle meter, object consists, following twelve movable parts, two arms composed, three layers, metal, whereby, middle part, right arm, expanded again, angle, 90 degrees, well, third arm, due, construction, remains, bisector, corner, legs, perpendicular, if, line, two connecting parts, riveted, arm, slide, mounted, middle arm, five short plates, i e, visors, attached, hinge, raised perpendicularly, sixth, missing, plate, circumference, semicircle, top, perpendicular notch, small round opening, provided, middle, allow you, see, left arm, inscription, Pro declinatione muri, engraved, letter D, year 1582, smooth underside, radius, center, circular connecting part, numbers 1, 10, rests, closed position, two arms, left, right graduations, going left, 3, 15, right, 90, repeated, round hole, drilled, part, slider, brace, moved, slanted sides towards, bottom, scales, right 0, terms vmbra recta, versa, West-Europa, 1582, brass, alloy, l 11 5
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