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).
Manufacturing specifications and cost quotations for various molded components, including insulators and a steering wheel part.
| Identifier | ExFiles\Box 39\3\ Scan092 | |
| Date | 19th May 1921 guessed | |
| Part No. -3- Per Piece £ Die Cost £ Quantities of Quotation E-17771. Contd. The plate could be made of a cheese about 3/4" deep with a hole drilled across it for the stem of the horizontal con- -ductor. The centre distance from the centre of the con- -ductor to the face of the plate would have to be held very accurate to assure proper location in the dies. The rotor would be molded upside down. Platinum could be sweated to rotor afterwards if desired. Balance plug could also be molded in place if allowed to project and cut off afterwards, or could be drilled with small hole to fit on pin in dies. Contraction of molded piece would look all inserts firmly. Cost slightly more than at present, about 1:50 300 500 U-2195 Terminal Insulator (straight knurl & threads molded) .18 185 3000 U-2198 " " " " " .20 195 500 E-1784/90 Caps - straight knurl, threads molded. No figures .17 175 3500 E-18416 Insulator bushing (Could also be used for E-18415) .20 1000 No die cost - die combined with that for U-2198) On the steering wheel the actual method of molding is still somewhat in doubt. The arms would probably need to have a collar cast around them to form the inner ends of the molded cover thus:- This collar would stand proud of the final dimensions of the Bakelite and would be squeezed in the dies to conform to the final shape of the Bakelite. | ||