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 Negretti & Zambra discussing Acrometers and Manographs, noting slow manufacture and high prices.
| Identifier | ExFiles\Box 40\1\ Scan019 | |
| Date | 31th October 1919 | |
| Messrs Rolls-Royce Ltd N & Z 31.10.19 D e r b y .......... Contd Fo. 2 .. you. We would in the latter case like to have a sample or particulars as to style of case, range etc. Your mention of non-return valves inclines us to think that perhaps you are referring to the Acrometer which shows the maximum pressures attained in the cy- linders & is also made for suction. We enclose a pull showing the most recent type, but for the moment the manufacture of these instruments is very slow & in view of the time required in it's manufacture & adjustment (at very high rates for skilled work) present prices are high. The Manograph, which shows the complete cycle on a ground glass screen & can produce photogra- phic records, we would supply fairly quickly. We regret our catalogues of Acrometers & Manographs are exhausted at present. We enclose our leaflet dealing with Overload Gauges, but the prices are only aproximate & we would have to quote specially. We are, dear Sirs, Yours truly, NEGRETTI & ZAMBRA Per R.{Sir Henry Royce} E.{Mr Elliott - Chief Engineer} Stone | ||