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 to Messrs. Peto & Radford discussing the merits of burnt up versus bolted battery connections.
| Identifier | ExFiles\Box 168b\3\ img198 | |
| Date | 24th May 1929 | |
| X 7535P EPCA/D.{John DeLooze - Company Secretary} 24th May, 1929. Messrs. Peto & Radford, 50 Grosvenor Gardens, LONDON, S.W.1. For the attention of Mr. G.R.N. Minchin. Dear Sirs, Burnt up versus Bolted Battery Connections. We have yours reference M/5 concerning the above subject. We are not, even now, in favour of a change over to burnt up connections for the 40/50 H.P. battery. On the contrary we are more inclined to make a reverse change in the case of the 20 H.P. In our experience the arguments which you advance in favour of burnt up connections as compared with the other type, have little weight in actual fact. Our own impression is, that the bolted connections are equally unlikely to come undone or get loose or make an uncertain contact. Then also on the question of corrosion and maintenance we do not find that these items are any greater. Our practical argument in favour of bolted connections, really lies in the fact of their being provided with the flexible kink which enables the battery as a whole to expand relatively over all the cells without throwing a strain on the several elements, it being appreciated that the rate of expansion of the cell case material is so much greater than that of the metallic linke. We have, in our experience, seen a number of cases in which this effect has caused a fract of the ebonite ring incorporated in the terminal post gland. | ||