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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 cause of failure in Smiths clocks for the 20/25 chassis as a broken balance wheel spindle.

Identifier  ExFiles\Box 164\1\  img103
Date  23th March 1933
  
x6135

To Mx.{John H Maddocks - Chief Proving Officer} from Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.8/KT.23.3.33.

20/25 CHASSIS - SMITHS CLOCKS.

With reference to Mx{John H Maddocks - Chief Proving Officer}7/T21.3.33. we have examined these two clocks and we are of the opinion that the trouble is not due to over-winding but due to a broken balance wheel spindle, as this trouble has previously happened with these clocks.

We have today handed these clocks to Messrs Smiths representative, Mr.Manwaring, who is arranging to have these repaired and a special report issued. Mr. Manwaring stated that they had experienced considerable trouble due to this cause, and a much more robust balance wheel spindle construction is now in hand and would be fitted to all future clocks despatched to us.


Hs{Lord Ernest Hives - Chair}/Wst.
  
  


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