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).
Page 3 of a letter from H.M. Hobson, Ltd. regarding a patented equalizer system for industrial and aeroplane gauges.
| Identifier | ExFiles\Box 44\2\ Scan173 | |
| Date | 12th July 1928 | |
| Messrs.Rolls-Royce,Ltd., Date 12.7.28. Page 3 where visible, through a copper pipe of sufficiently large diameter to carry the two smaller ones. The lines cannot be assembled the wrong way round, because each line is provided with a union of a different thread, and a slightly different diameter at each end. There- fore in whichever direction the combined air lines are coupled up, they must necessarily be attached to the correct points. We are preparing a small explanatory diagram of our proposed arrangement, showing the advantages obtained by using the equalizer bell and equalizer line, which is our standard industrial and aeroplane gauge practice, as recently patented by the King-Seeley Corporation. From a commercial point of view, we would like to say that we should be prepared to add these features to any gauges with which we might supply you, without extra cost. Assuring you at all times of our best attention, We remain, dear Sirs, Yours faithfully, H.M.HOBSON,Ltd., [Signature: T.P.Searight] Joint Managing Director. | ||