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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).
Discussion with sketches on the design of ignition system components, comparing Bosch, Delco, and Lucas.

Identifier  ExFiles\Box 61b\1\  scan0015
Date  12th February 1927 guessed
  
-2-

I rather like Bosch better than Delco, which has such a large piece of fibre to change its shape.

Would it be good to have damping friction on the pivot ?

Spring finger
Say 1 lb. on fibre disc.
Say ¼" dia. top and bottom.

Creating say 10% friction of return spring.

Could we also reduce rebound and scrub tungsten (very hard points) clean by movement between the points -

Difficult to know how to do this without up-setting the bedding. What is the practice of the magneto people ? Have the Lucas people actually made their points last so long; If so, how ?


R.{Sir Henry Royce}
  
  


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