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).
The failure of slotted ebonite separators and a proposed superior circular hole perforated design.

Identifier  ExFiles\Box 54\1\  Scan352
Date  27th March 1930 guessed
  
2
J.D.60.
type. The slots had been opened by pressure of the positive grid bars these being arched & distorted.
Mr McKinnon saw this cell & he suggested the ebonite separators should have a frame all round to strengthen same but this would put up the expense considerably. I gave him various reasons why this would not be an advantage & he agreed.
The slotted & ebonite separator has now been superceded by the circular hole perforated separator which I think will be found to be much superior.
The cause of failure was due to the separators failing in the first place, this causing sulphation & the positive plates to grow & short on the negative strap.

gg.
  
  


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