File:Sandfields Pumping Station - Interlocking sectors (geograph 6404029).jpg
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Summary
| Description |
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. |
| Date | |
| Source | From geograph.org.uk |
| Author | Chris Allen |
| Permission (Reusing this file) |
Creative Commons Attribution Share-alike license 2.0 |
| Attribution (required by the license) | Chris Allen / Sandfields Pumping Station - Interlocking sectors / |
| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Object location | | View this and other nearby images on: OpenStreetMap | |
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Licensing
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Chris Allen and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:50, 15 May 2020 | | 427 × 640 (63 KB) | Dagodfrey | Transferred from geograph.co.uk using [https://tools.wmflabs.org/geograph2commons/ geograph2commons] |
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