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).
Testing and performance of a Philips A.C. rectifier for charging chassis batteries.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan129 | |
| Date | 16th November 1925 | |
| To R.{Sir Henry Royce} from EFC. c. CJ. E.{Mr Elliott - Chief Engineer} c. PN.{Mr Northey} RG.{Mr Rowledge} c. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} c. Hy.{Tom Haldenby - Plant Engineer} RE PHILIPS RECTIFIER. X1589 Some time ago you made enquiries as to whether we knew of a suitable A.C. rectifier for charging chassis batteries. We have recently had for test a rectifier designed for this purpose by the Philips Lamp Co. of Holland, and it appears it might be a useful apparatus to recommend to customers desiring to charge their batteries from the A.C. supply. It appears that the resistance elements should last indefinitely (apart from breakage), so that the only replacement would be the valve itself. There being no moving parts, the rest of the apparatus should function indefinitely. We have not made prolonged tests with this rectifier, but have reason to believe that the charging output and efficiency would be reduced with use, and only restored by the substitution of a new valve. So far as its initial performance is concerned, please find attached copy of my assistant's report AC.64, of work done on this apparatus, charging all numbers of cells from 1 to 7. Roughly speaking, it will charge a three cell battery at 5-1/2 amperes, and a six cell battery at 2 amps., though the rated charging rates are 6 and 3 amperes respectively. The catalogue price of this rectifier is £8.0.0. subject to a trade discount of 25%. EFC. | ||