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).
Technical description of a metal rectifier, its properties, and applications in battery charging.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan031 | |
| Date | 6th May 1930 | |
| EFC/ADL.6.5.30 contd. -6- any volt and ampere output for the charging of small batteries, and is now also provided for the trickle charging of standby automatic emergency batteries in public buildings. The metal rectifier is especially suitable for low tension rectification, and some very large ampere capacity plating equipments have been or are being made. It may in fact be said, that the metal rectifier has made the problem of charging from alternating current practically as simple, and far more efficient than charging from direct current. The metal rectifier is the electrical equivalent of a mechanical automatic valve. The reverse current is practically zero. There is no noise, movement, mess, smell or light and no accessory current required to start or to operate. The only limitations are reverse voltage per element and forward current density per square inch of rectifying surface, which is the surface of separation between copper oxide specially prepared on a copper surface and the copper itself, connection being made to the copper oxide by means of a lead plate. The maximum reverse voltage per unit is six, and just like cells the units are arranged in series or parallel for more volts or amperes. I have already has considerable personal experience of such rectifiers; so far with complete satisfaction. Our switchbox plug and socket connection is arranged for one way polarity only. etc. EFC. | ||