Albert Dock Swing Bridge: Difference between revisions
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[[Image:Haigh2.jpg|thumb|Swing bridge made by [[Haigh Foundry Co]]]] | [[Image:Haigh2.jpg|thumb|Swing bridge made by [[Haigh Foundry Co]]]] | ||
[[Image:Haigh1.jpg|thumb|Capstan for Albert Dock swing bridge]] | [[Image:Haigh1.jpg|thumb|Capstan for Albert Dock swing bridge]] | ||
[[Image:JD 2017 Albert Dock bridge01.jpg|thumb|]] | |||
at [[Albert Dock, Liverpool]] | at [[Albert Dock, Liverpool]] | ||
A rare example of a cast iron double leaf swing bridge. | A rare example of a cast iron double leaf swing bridge. | ||
Each cantilevered span or 'leaf' pivots about a cast iron post having a hemispherical top, and turns on tapered flanged iron wheels. The leaves are counterweighted, but in the event of overloading, excessive tilting would be resisted by contact between brackets on the leaf casting and pads on the fixed part of the base (see third photo). Turning is done manually by hand cranks acting through bevel gears to a pinion which engages with a large curved rack. | Each cantilevered span or 'leaf' pivots about a cast iron post having a hemispherical top, and turns on tapered flanged iron wheels. The leaves are counterweighted, but in the event of overloading, excessive tilting would be resisted by contact between brackets on the leaf casting and pads on the fixed part of the base (see third photo). Turning is done manually by hand cranks acting through bevel gears to a pinion which engages with a large curved rack.<ref>'The Liverpool Dock Ebgineers' by Adrian Jarvis, Alan Sutton Publishing, 1996</ref> | ||
Revision as of 16:41, 27 January 2022
A rare example of a cast iron double leaf swing bridge.
Each cantilevered span or 'leaf' pivots about a cast iron post having a hemispherical top, and turns on tapered flanged iron wheels. The leaves are counterweighted, but in the event of overloading, excessive tilting would be resisted by contact between brackets on the leaf casting and pads on the fixed part of the base (see third photo). Turning is done manually by hand cranks acting through bevel gears to a pinion which engages with a large curved rack.[1]
See Also
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Sources of Information
- ↑ 'The Liverpool Dock Ebgineers' by Adrian Jarvis, Alan Sutton Publishing, 1996