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 Delco-Remy & Hyatt Ltd. concerning the supply and technical specifications of Vacu-matic distributors.
| Identifier | ExFiles\Box 168\3\ img272 | |
| Date | 15th May 1940 | |
| DELCO-REMY & HYATT LTD. Telegrams: DELREMYHYAT, SOWEST, LONDON Head Office & Works: 111 GROSVENOR ROAD, LONDON, SW1 Telephones: VICTORIA 6242 (7 LINES) Messrs. Rolls-Royce, Ltd., Derby. YOUR REF: Rm{William Robotham - Chief Engineer}/RC{R. Childs} JM{Mr Morley} OUR REF: BR/AE For the attention of Experimental Department SUBJECT 15th. May 1940. Dear Sirs, We acknowledge receipt of your letter of 10th. inst. for which we thank you. We have no 4-cylinder Vacumatic Distributor in regular production, but the only difference between such a Distributor and our 647.GB, of which you have a sample, would be that the cam would have 4 lobes, and the H.T. cap would have outlets for 4 plug wires, as in the case of SM.1009.L. We would be pleased to supply three such units under our Part No. 647.X, which would be exactly as the 647.GB, generally to our Drawing 9A.9633, but modified as above. With regard to the 6 and 8 cylinder two lever type Distributors, it is somewhat difficult to fit this type of Distributor with vacumatic control, acting on a circuit breaker plate with two circuit breaker arms, owing to the circuit breaker arm reaction, this force alternating through 180°. It is for this reason that all our vacumatic Distributors have one circuit breaker arm, as in the case of the American built Buick, Oldsmobile, etc. To avoid circuit breaker arm bounce, this Distributor is, necessarily, fitted with a special light arm; undoubtedly you are familiar with these cars. For the above reasons we still use the vacuum control attached to the timing lever for the two lever type Distributors; these are shown on our Drawing AD/9/7454, but their layout can, of course, be modified to suit any particular engine. DELCO BRITISH MADE IGNITION - DELCO-REMY ELECTRICAL EQUIPMENT - DELCO CAR ACCESSORIES - DELCO ELECTRIC MOTORS & FANS DELCO LIGHTING PLANTS - AC FUEL PUMP & INSTRUMENT SERVICE - AC CAR ACCESSORIES HYATT ROLLER BEARINGS - NEW DEPARTURE BALL BEARINGS - WILLS PRESSURE-FILLED JOINT RINGS - BINKS SPRAY PAINTING EQUIPMENT | ||