James Ferguson's crane, 1764-1776.
3 1 c m
40cm
actual image size: 32cm x 23cm

James Ferguson's crane, 1764-1776.

© Science Museum / Science & Society Picture Library

Description

Model. James Ferguson (1710-1776) devised this crane in 1764 to overcome two problems: the disastrous effects of letting the load drop in a common crane, and the inefficiency of raising a small load with an unnecesarily large mechanical advantage. Ferguson stated that his crane could be installed in a room 8 feet square.
 

Image Ref.

10191414
 

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