Spring safety valve, c 1830. This design of

 
Spring safety valve, c 1830. This design of
4 0 c m
 
32cm
actual image size: 24cm x 32cm

Description

Spring safety valve, c 1830. This design of safety valve is attributed to Timothy Hackworth, who used one on his 'Royal George' locomotive in 1828. A number of superimposed semi-elliptic plate springs, guided by two pillars, bear on the valve, and are pressed down by a crosshead and two adjustable screws housed in the pillars.

Image Details

Image Ref.
 
10306470

© National Railway Museum / Science & Society Picture Library -- All rights reserved

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