File:Spring balance (Steam and the Steam Engine, Evers).jpg

Spring_balance_(Steam_and_the_Steam_Engine,_Evers).jpg ‎(123 × 558 pixels, file size: 7 KB, MIME type: image/jpeg)

Summary

Description Salter coil-spring spring balance, used as part of a boiler safety valve.
Date c. 1875
Source Scan from Evers, Henry (1875) Steam and the Steam Engine: Land and Marine, Glasgow: Williams Collins
Author Andy Dingley (scanner)
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spring scale

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Date/TimeThumbnailDimensionsUserComment
current17:38, 23 September 2009Thumbnail for version as of 17:38, 23 September 2009123 × 558 (7 KB)Andy Dingley{{Scans from 'Steam and the Steam Engine - Land and Marine', 1875 |page= |description= }} Category:Safety valves
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