Model of a Ladder, Model of a two-part ladder. The extendable section has a wheel at the top of each leg and is extended with a crank and winch at the bottom of the section: its rope runs over a disc in one of the upper rungs of the section to the lower rung of the extendable section. Two catches prevent it from sliding back. The extendable part is also equipped with a floor, which automatically drops out at a certain height as an intermediate support and serves as a bracket. The floor is incomplete., Petrus van der Loo, The Hague, c. 1850, wood (plant material), brass (alloy), l 109 cm × l 191 cm (max.) × w 9.3 cm
Keywords:
Model, Ladder, two-part ladder, extendable section, wheel, top, leg, extended, crank, winch, bottom, section, rope runs, disc, upper rungs, lower rung, Two catches prevent, sliding back, extendable part, equipped, floor, automatically drops out, certain height, intermediate support, serves, bracket, incomplete, Petrus van der Loo, Hague, c, 1850, wood, plant material, brass, alloy, l 109
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