TQ3679 : Greenland dock entrance lock - gate mechanism

taken 6 years ago, near to Isle of Dogs, Tower Hamlets, Great Britain

Greenland dock entrance lock - gate mechanism
Greenland dock entrance lock - gate mechanism
This is the machinery that operated one of the four lock gates and is variously ascribed to the 1880s or 1902. It consists of a double acting hydraulic cylinder connected to the gate via a crosshead and connecting rod. The operating mechanism is on the left and consists of a single lever for open and close. A very simple interlock system ensures that it can't overstroke or be started in the wrong direction. Three of the gates have this arrangement but the fourth has the added refinement (?) of a device that seems to be able to alter the hydraulic pressure between 390 and 760 psi. The nominal pressure of the London system was 750 psi.
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TQ3679, 502 images   (more nearby )
Photographer
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Image classification?
Supplemental image
Date Taken
Sunday, 21 August, 2011   (more nearby)
Submitted
Thursday, 25 August, 2011
Geographical Context
Historic sites and artefacts  Docks, Harbours 
Place (from Tags)
London 
Subject Location
OSGB36: geotagged! TQ 3664 7927 [10m precision]
WGS84: 51:29.7520N 0:1.9816W
Camera Location
OSGB36: geotagged! TQ 3664 7927
View Direction
South-southeast (about 157 degrees)
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Other Tags
Hydraulic Cylinder  Lock  Mechanism  Machinery 

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