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).
Proposal for two modified Resistance Units with identification tags to solve a vehicle's battery charging issue.
| Identifier | ExFiles\Box 163\6\ img078 | |
| Date | 26th November 1930 | |
| c - EFC. X6016. BY/RD2/W.26-11-30. We have received a letter from Sg.{Arthur F. Sidgreaves - MD}, from which we gather that with the Half-Charge Scheme fitted to his car he is unable to keep his battery fully charged when running about Town, and it is proposed to send him two Resistance Units in all respects standard, to our L.O.P. D.72633, but fitted with a much shorter length of wire, in the one case :- 6" working length of Resistance Wire of the same diameter. 16" working length of the same diameter Resistance Wire. Will you please have these two Units made up and hand to EFC. to take with him to London. On each Unit a small brass or copper Tag should be attached to one of the ferrules before rolling over, with the Figure 4 or 8 stamped on it so that we may have a method of identifying the varying values of these Units. We propose to instruct this Identification Tag as part of the standard equipment so that in future it will at all times be possible to ascertain the value of the Unit fitted to any particular chassis. BY/RD. | ||