Rolls-Royce Archives
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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).
Specifications for insulation testing apparatus including an electrode, test plate, feeler, and oven.

Identifier  ExFiles\Box 24\2\  Scan056
Date  24th January 1919
  
RR 300 (120B) (SF 349 24-1-19) MP 200552
ROLLS-ROYCE LIMITED.
INSTRUCTIONS.
88232
To
Order No
Customer's No.
Re: Apparatus for Insulation Testing (Cont'd)
earthed electrode of the stand. This can be 6 or 8 inches long.
③ Test-plate and feeler! Comprising a flat circular plate of about 6" dia rounded at the edges & with recess for earthing. Also a flexible metal strip (say of steel about 10 thou thick) mounted on a reliable insulating handle, for exploring sheet insulation.
④ Oven of about 18" to 2ft cubed, ventilated top and bottom and well lagged with asbestos. Capable of raising the temperature inside to at-least 150°C by means of heating element situated at the bottom. This preferably electric, but alternatively
(Cont'd)
Signed
This Sheet must be filed on completion of the work.
  
  


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