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 Cambridge and Paul Instrument Company regarding the supply and testing of a chronograph.
| Identifier | ExFiles\Box 138\2\ scan0006 | |
| Date | 25th February 1924 | |
| X4630 TELEGRAMS: INSTRUMENT, CAMBRIDGE. CODES: A.{Mr Adams} B. C. (5TH AND 6TH EDITIONS); WESTERN UNION; BENTLEY'S. TELEPHONE: CAMBRIDGE NO. 615. THE CAMBRIDGE AND PAUL INSTRUMENT COMPANY, LIMITED, INCORPORATING THE CAMBRIDGE SCIENTIFIC INSTRUMENT CO., LTD., CAMBRIDGE. AND ROBT. W. PAUL, LONDON. REGD. TRADE MARK. HEAD OFFICE AND SHOWROOMS: 45, GROSVENOR PLACE, LONDON. S.W.1. WORKS: LONDON AND CAMBRIDGE. YOUR REF... Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG. CAMBRIDGE, ENGLAND. IN REPLY PLEASE QUOTE WGC/MW 25th February 1924. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, Chronograph. In reply to your letter of the 23rd instant, we should mention that the photograph of the chronograph submitted to you with our letter of the 22nd instant showed a clock-drive, but this clock is an accessory piece of apparatus, the standard chronograph being fitted with a three-speed grooved pulley and worm drive for running off an electric motor. We would therefore propose to supply this chronograph fitted on to a base together with a 12-volt motor, and as there will then be ample power available it is possible to get any reasonable speeds, and certainly speeds within the limit you have already mentioned. In order that we might reply with certainty to queries No.1 and 2 we have actually taken one of our standard instruments, placed it on the wooden floor of our light Ford lorry, and run over a piece of very rough road, and enclose herewith a record taken under those conditions. You will probably note that the three intervals are not exactly coincident, but this is due to the fact that the pens had not been correctly adjusted. We see no difficulty whatever in the use of ink under these circumstances as the pens are large and will give a long record without refilling and when | ||