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 from The Chloride Electrical Storage Company Ltd. discussing bolted versus burned battery connections.
| Identifier | ExFiles\Box 54\2\ Scan057 | |
| Date | 12th May 1925 guessed | |
| Sheet No.2. Messrs. Rolls-Royce Ltd., Derby. individual cell has to be examined internally, it is necessary to break the connection, and facilities for re-making the connection are not always handy. With bolted connections, a massive brass stud can be employed, and comparatively light copper strips can be used as intercell connections - increased conductivity is therefore a simple matter. A cell can be readily cut out of circuit or opened up for examination - the user is therefore better assured of continuity of service with this type of connector. On the other hand, unless care is taken to keep the connections clean and tight, trouble with corrosion and hot contacts might be anticipated. Personally we have found no trouble at all with your bolted-up connections. The batteries sent to us for repair have been good externally. The copper connectors and nuts are well protected by lead plating. We quite agree that the possibility of loose connections and corrosion justifies serious consideration of the adoption of burned connections as a standard, but we feel that it is only a talking point, and that the swing over with its obvious complications, should give you grounds to think well before you make a decision. We have in mind the fact that so many of your batteries in service have bolted connections, and are likely to remain in service for another 3, 4, or even 5 years. It should also be remembered that replacement parts suitable for bolted connections for Rolls-Royce batteries, are stocked over the whole world, and if, or when, burned-up connections become standard, it will be necessary to double the stocks of component parts, or diminish the effectiveness of Rolls-Royce service. Yours faithfully, THE CHLORIDE ELECTRICAL STORAGE COMPANY LTD. (Sgd) E.C. McKinnon. Chief Engineer. RECEIVED | ||