Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Note discussing the convention for indicating windings and a scheme for reduced charge switching with higher output generators.

Identifier  ExFiles\Box 163\6\  img014
Date  30th January 1930
  
EFC1/AD30.1.30 contd.

-3-

convention of indicating inductive windings by spirals,
and purely resistive windings or resistances by straight
zigzags.

You will see by my note EFC7/AD28.1.30 addressed
to PN.{Mr Northey} that we regard the provision of reduced charge
switching as an essential feature of the scheme of
utilising generators of "higher output".

EFC.
  
  


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