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).
Letter from S.U. Carburetter Co. Ltd. discussing platers, pump terminals, and diaphragm design.
| Identifier | ExFiles\Box 149\6\ scan0084 | |
| Date | 26th October 1937 | |
| TELEPHONE: BIRMINGHAM EAST 1171. 1263 TELEGRAMS: FLEXCARBUR, BIRMINGHAM. File Please THE S.U. CARBURETTER CO. LTD. PROPRIETORS:- MORRIS MOTORS LTD. LORD NUFFIELD CHAIRMAN OLIVER BODEN, O.B.E. VICE-CHAIRMAN BORDESLEY GREEN ROAD, ADDERLEY PARK, BIRMINGHAM, 8. Dixon- T.C. SKINNER, M.I.A.E. MANAGING DIRECTOR YOUR REF: RM{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}6/JE OUR REF: RLK/NK. Messrs. Rolls-Royce Limited. 26th October 1937. DERBY. Dear Sirs, We apologise for not having replied to your letter fully before but the writer has been away at the Show. We have been on to our Platers and they do not appear to be prepared to attempt to plate part of the unions only. Can you recommend us to a firm who would do this. There is no difficulty at all in using our standard terminal tag and lead washer, in fact it was originally intended to use this on the high pressure pump but we believe the Ross Courtenay terminal was obtained as we had not received your sanction to change over. We quite agree that one could gain stroke on the high pressure pump or for that matter on the others by reducing the amount of throw over on the back stroke. At one time this margin was necessary in order to allow for shrunk diaphragms. To-day we do not think it is necessary and it would particularly be unnecessary if we changed over to a neoprene diaphragm. There is one point however, which we should have to consider before adopting this. With the present large margin when the pump is priming the contact breaker throws over before the inner rocker hits the magnet body. If we reduced the margin here, the tips of the rocker would hit the pot and would probably break the inner rocker in due course. It therefore seems that if we are to reduce this margin of throw over it must be done in such a way that the -1- | ||