Metadyne
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A metadyne is a direct current electrical machine with two pairs of brushes. It can be used as an amplifier or rotary transformer. It is similar to a third brush dynamo but has additional regulator or
Spare Metadyne carbon brushes. They are individually wrapped and, together with labels, sealed in plastic. Total length including the connecting wire and ring is 115 mm. The thickness of the carbon slab is 8 mm.
Three arrangements of a metadyne cross-field DC machine, and the construction of Macfarlane's Magnicon
A London Underground CP train (in red) at Upminster. They were originally fitted with Metadyne controls and were the first electric multiple units to use regenerative braking.
Acton Works
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Acton Works is a London Underground maintenance facility in West London, England. It is accessed from the District line and Piccadilly line tracks to the east of Acton Town station, and was opened in
1967 Stock cars in use at Acton Works for training of the Emergency Response Unit.