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 to The Chloride Electrical Storage Co. Ltd. discussing wording for battery maintenance instructions.
| Identifier | ExFiles\Box 26\2\ Scan374 | |
| Date | 21th May 1930 | |
| The Chloride Electrical Storage Co.Ltd. Clifton Junction, Nr. Manchester. 21st May, 1930. -2- (e) We agree with your new (16) on "Failure of one or more cells" being exactly like our proposed (17). (f) We agree with your new (17) as being exactly like our suggested (15) as far as "being required", also to the addition of your note as follows :- "Note that too little charging causes an unhealthy condition of the plates; too much charging results in abnormal wear and tear." (g) We agree to the/portion of (16) in our notes commencing "A battery should not" and terminating "covered with electrolyte". It appears that in your suggestion this is intended to be covered by your new paragraph (15). The middle paragraph will be suitably covered if you will agree that we put in italics your sentence "it is important to charge the battery promptly, and not to allow it to stand in a discharged condition as this may shorten its life". Should we not however, somewhere include the sentence "It is of even greater importance to keep all plates always well covered with electrolyte", say in (9) "Maintenance of battery in service", and should we not make the second sentence of your (15) read :- "The battery may be discharged with safety until the voltage, taken with the head lights "on", falls to 10.8 volts across the battery, or 1.8 volts per cell, but should not normally be allowed to continue discharging when the voltage of any cell has fallen below these voltages (except momentarily for the purpose of tracing a faulty cell as described below". | ||