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 accumulator manufacturer Peto & Radford discussing the design and testing of battery indicators.
| Identifier | ExFiles\Box 60\3\ Scan005 | |
| Date | 9th March 1927 | |
| X2040 Works, Dagenham Dock, Essex Telephone VICTORIA 3667. 5 LINES PRIVATE BRANCH EXCHANGE. TELEGRAMS CONCENTRATION, SOWEST, LONDON. Manufacturers of P & R Accumulators. Established 1889 PETO & RADFORD Proprietors - Pritchett & Gold and E.P.S. Company Ltd 50 GROSVENOR GARDENS, LONDON, S.W.1. DIRECTORS: S.R. ARCHIBALD C. GOLD F.G. GRAHAM MENZIES G.R.N. MINCHIN WILLAM PETO C.R.D. PRITCHETT T.W. PRITCHETT. YOUR REF.......... OUR REF..... M {Mr Moon / Mr Moore} /5. 9th March 1927. Seen CAP g &EW E. {Mr Elliott - Chief Engineer} Fowler Clark Esq., Messrs. Rolls Royce Ltd., DERBY. Dear Fowler Clark, X4040 I have yours of the 7th inst. The sketch of the indicator that you give is perfectly correct except that there are two of them, one of which has a single nozzle outlet for the bubbles as you have drawn it, the other is exactly the same but it has a sort of rose nozzle with several holes. I left both of these indicators with Mr. Royce at Le CanadelHenry Royce's French residence and we tried both of them while we were down there and Dod and I both liked the action of the single hole best. It was arranged that both of them should be left with Mr. Royce and he would play about with them and communicate with you if he thought fit. We finally made the thing up into a very small neat thing and it could be made smaller and cut down to about the size of a match box, but I do not know whether Mr. Royce is serious about it or whether it is merely a matter of an interesting experiment to him. A good deal of experimental work had to be done to get just the right amount of liquid and space above the liquid to prevent the gas from carrying away any liquid and thus losing it, the size of the hole, and a number of other details. Mr. Preston in our Laboratory did all this and I think that if you started with the devices Mr. Royce has got it would save you a lot of initial trouble and experimental work. Thanks for the copy of the special report on the 20 H.P. battery. It is very good of you to arrange to send this. | ||