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).
Test results for an Elliott Ammeter, the reasons for a filed sealing cup, and a proposed resolution.
| Identifier | ExFiles\Box 168\5\ img097 | |
| Date | 1st February 1927 | |
| To Wd.{Mr Wood/Mr Whitehead} from EFC. V4622 EFC/L/T5.2.27. ELLIOTT AMMETER. No.140999. Reference your WD{Mr Wood/Mr Whitehead}9/WJ4.2.27, on enquiry I find that there is no doubt whatever as to the readings of the instrument on test in our laboratory after having been removed from the car, being as described in the report JC.67. Also that the last para. of that report represents as far as can accurately be seen the internal condition of the instrument. In regard to their last para. on enquiry I find that the reason the sealing cup was partly filed away is that there is a tendency sometimes for the dashboard into which these instruments are fitted subsequently to swell a bit and make it difficult to remove the instrument which has been easy to put in through the same hole in the first instance. Though we agree this should not have been done if it could have been avoided, it will be agreed that with a reduction in the size of hole into which the instrument was fitted, it would be a very difficult matter otherwise to remove the instrument, and we understand that the amount of filing was relatively very small. In the circumstances it appears we shall have to inform Messrs. Elliott that we are willing to have this instrument made O.K. at our expense, but as they say it is reading accurately, this zamak would appear not to be a serious matter. It rather looks as if there was some small piece of foreign material interfering with our own test which got dislodged in transit. May we leave it to you to put the matter to them in a suitable form ? EFC. | ||