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).
Departmental memo with a query from Mr. Royce comparing the voltage constancy of Edison lighting batteries to lead accumulators.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page208 | |
| Date | 10th February 1913 | |
| R.R. 475 (100 H) (PP 366. 7.1.13) E.P. 3312 X.50. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 476 (FOUR LINES). N9/B10213. DEPARTMENTAL MEMO. This column is for Name of Person addressed. DATE. Mr Wormald 10-2-13 X664 Re Accumulators. X 50 Mr Royce asks - "Does the Edison lighting battery keep the E.M.F. more or less constant on the lamps than lead accumulators which must vary from 2 volts x 6 to 2.5" x 6 on a 12 volt installation such as use for Vandervells. Copy sent to Mr Helderly 11:2:13 This sheet must be filed with the correspondence to which it refers. | ||