Albert Dock Swing Bridge: Difference between revisions
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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.<ref>'The Liverpool Dock | 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 Engineers' by Adrian Jarvis, Alan Sutton Publishing, 1996</ref> | ||
Note: A number of superficially similar swing bridges were used throughout Liverpool Docks, but they differed in detail and came from different makers. | |||
Latest revision as of 10:44, 28 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]
Note: A number of superficially similar swing bridges were used throughout Liverpool Docks, but they differed in detail and came from different makers.
See Also
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Sources of Information
- ↑ 'The Liverpool Dock Engineers' by Adrian Jarvis, Alan Sutton Publishing, 1996