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File:Sandfields Pumping Station - Interlocking sectors (geograph 6404029).jpg

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English: These are on an 1873 built Cornish engine and ensure correct sequencing of the valve events. I believe these are also known as scoggans but am struggling to track down the definition. The upper one is on the exhaust arbor and the lower one on the equilibrium. As the piston is at the top of the cylinder the exhaust valve is open and preventing the equilibrium valve opening until the engine has completed its indoor stroke. There is evidence of considerable wear.
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Source From geograph.org.uk
Author Chris Allen
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Chris Allen / Sandfields Pumping Station - Interlocking sectors / 
Chris Allen / Sandfields Pumping Station - Interlocking sectors
Camera location52° 40′ 24.5″ N, 1° 50′ 06″ W  Heading=180° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
Object location52° 40′ 24.5″ N, 1° 50′ 06″ W  Heading=180° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Chris Allen
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52°40'24.460"N, 1°50'5.680"W

heading: 180.0 degree

28 February 2020

52°40'24.46"N, 1°50'5.68"W

heading: 180 degree

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Date/TimeThumbnailDimensionsUserComment
current01:50, 15 May 2020Thumbnail for version as of 01:50, 15 May 2020427 × 640 (63 KB)DagodfreyTransferred from geograph.co.uk using [https://tools.wmflabs.org/geograph2commons/ geograph2commons]

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