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).
Evaluation and testing of chassis ammeters from different suppliers, Weston and Elliott Bros.
Identifier | ExFiles\Box 168\5\ img038 | |
Date | 1st January 1926 | |
X4622 To BJ. from EFC. c. to Wd.{Mr Wood/Mr Whitehead} c. to ROY.{Sir Henry Royce} c. to C. EFC3/T1.1.26. RE CHASSIS AMMETER. X4622 Y:162 Reference BJ6/HL6.12.25, addressed to Hs.{Lord Ernest Hives - Chair} We have had negotiations with Messrs. Elliot Bros. on the question of ammeters, and we have at the moment four of their instruments on our experimental cars, which appear very similar to the Weston, though the finish is not actually as good. Of these four instruments, one has done considerably over 10,000 miles on 8-EX chassis in France without any trouble. The other three have not yet covered very much mileage, e.g. 948, 79 and 108 miles respectively, with now trouble so far. Owing to small faults in two of the instruments as at first received, for which they had to be returned for correction, we feel that we should postpone any suggestion of standardisation until the completion of further mileage on the other instruments. There is also the question of obtaining a rather better finish if possible, which point we are taking up with Messrs. Elliott Bros. It should be appreciated that the Weston Elec. Co. has a world-wide reputation in the production of precision electrical instruments, and insofar as instruments of the type and size under consideration are concerned, there is no question of such instruments being beaten elsewhere at the moment. Considering the fact that a relatively delicate instrument such as a moving coil ammeter for a chassis might be expected to give trouble in instances here and there, it is remarkable how little trouble we have actually had with the instruments which we use made by the Weston Elec. Co. Though Messrs. Elliott Bros, an English firm, are doing their best to provide us with instruments of similar quality, as stated above, we feel that in spite of one 10,000 mile test already carried out, it would not be wise to rush into utilising Elliott instruments on production. Contd. | ||