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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).
Request for chromium plating of parts for a Valve Spring Rig, including a diagram.

Identifier  ExFiles\Box 17\6\  Scan226
Date  25th May 1934
  
RHC.{R. H. Coverley - Production Engineer}
x7060
Hs{Lord Ernest Hives - Chair}/Smth.12/KW.25.5.34.

Valve Spring Rig.

In connection with this will you please have
the following parts chromium plated :-

(1) The outer rim of spring top washer, E.70315 - 2 off.
(2) A piece of brass plate 6" x 12" x 1/8".

The plated parts should be buffed up so as to
form a mirror-like surface. The brass plate should be
dead flat and buffed up on one side only.

The rims of the washers should also be flat as
shown -

[drawing of a cross-section of a washer rim]

This surface flat.

Hs{Lord Ernest Hives - Chair}/P.Ll.Smith.
  
  


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