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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).
Proposal to replace the standard torsional spring with an extension spring for closing the main throttle.

Identifier  ExFiles\Box 171\3\  img146
Date  12th December 1922
  
Hsl/LGS.12.22.

SPRING FOR CLOSING MAIN THROTTLE WHEN
STARTER CARBURETTER IS FITTED.

We have had considerable difficulty with the
present standard torsional spring in getting the loading
of the spring consistent and equal on all throttles.
If the spring is too strong, the throttle control lever
on the steering column has to be put further up the
quadrant to obtain the slow running position.

The new scheme, instead of a torsional spring,
an extension spring is used and the centers are arranged
so that the loading remains practically constant over the
entire range.

We consider this is a definite improvement over
the present arrangement and should be adopted as soon as
possible.

There will be no scrap.

Hs.{Lord Ernest Hives - Chair}
  
  


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