Wharf jib crane, 1729-1752.
3 4 c m
40cm
actual image size: 32cm x 26cm

Wharf jib crane, 1729-1752.

© Science Museum / Science & Society Picture Library

Description

Model. This crane was designed for Mr Ralph Allen, a quarry owner at Bath, Avon. The rope pases over a vertical pulley and between two horizontal pulleys, the small roof keeps it dry. The gearing enables a large weight to be lifted using little effort and the horizontal pulley allows the arm to be turned easily.
 

Image Ref.

10191404
 

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