Facebook for Preston historians

Below is a post by Ashley Warren Preston on the Preston History Facebook page that is a companion to this website. I’ve posted it here to provide an example of the sort of content posted on the page by members.

The Preston History page was launched a year ago with the aim of providing a forum where those interested in the history of Preston could post, comment and share. I thought it would be a fairly small group of fellow history buffs, but it quickly proved very popular.

There are now more than 4,200 members, and the membership continues to grow, with more than fifty signing up in the past week. Here’s Ashley’s post about Preston Dock:


Preston Dock capstan 1
Shown here are just two of the images uploaded by Ashley on the Preston History FB page. Follow the link above to see them all and links to the relevant maps.

Capstans

There are four capstans situated at various places around the docks. They are now effectively ornaments, but they were once used as part of the mechanism to open and close the lock gates. They were subsequently replaced by a hydraulic system.

If you look at them closely, you can see a ratchet system on them. This is a device consisting of a bar or wheel with a set of angled teeth in which a cog or tooth engages, allowing motion in one direction only. A bit like the freewheel on the back wheel of a bicycle.

I think that they would have been turned by human power. Once the water levels are equalised on either side of the lock, it should have been reasonably easy to move the gates. I’ve done the ones on the canal, so maybe a few people would have been needed. The lock gates at the docks are quite a bit bigger.

I have found some pictures of them in situ, but not in use. The closest that I have seen to some working ones are at the Latchford Locks on the Manchester Ship Canal/River Mersey near Warrington. Unfortunately, they are a bit derelict now, but I have included some pictures of those too. That might give a bit of an idea about the setup with the chains. They are the ones that are painted black and white.

I’ve included a section of the Ordnance Survey Map that was surveyed in 1890 and published in 1892. They are indicated in their working positions on this map.

Preston Dock capstan 2

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