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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).
Notification regarding a push button switch developing an earth due to an unsuitable insulating button.

Identifier  ExFiles\Box 34\3\  Scan043
Date  11th September 1919
  
To By.{R.W. Bailey - Chief Engineer} from EFC.

EFC3/T11.9.19.

X.2641 - PUSH BUTTON SWITCH

A case has now come to our notice of a push button switch developing an earth between the moving lever and the push button, after several days satisfactory use on a car, owing apparently to the little insulating button not being suitable.

We attach a copy of this occurrence as reported to me, and will be glad if you will look into this with a view to avoiding further trouble in this direction.

You will remember the possibility ofthis was pointed out in our EFC4/T20.8.19.

EFC.
  
  


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