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 an instrument company clarifying the function of a three-pen chronograph.
| Identifier | ExFiles\Box 138\2\ scan0016 | |
| Date | 11th March 1924 | |
| f4630 CODES: A.B.C. (5TH AND 6TH EDITIONS); WESTERN UNION; BENTLEY'S. TELEPHONE VICTORIA 7640 (3 LINES). BRITISH EMPIRE EXHIBITION WEMBLEY LONDON April-Oct. 1924 BRIDGE AND PAUL INSTRUMENT COMPANY, LIMITED. INCORPORATING SCIENTIFIC INSTRUMENT CO. LTD. CAMBRIDGE AND PAUL, LONDON. MANUFACTURERS OF MECHANICAL & ELECTRICAL INSTRUMENTS OF PRECISION WORKS: LONDON & CAMBRIDGE. REGD. TRADE MARK HEAD OFFICE AND SHOWROOMS: 45, GROSVENOR PLACE, LONDON, S.W.1. YOUR REF. HS{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG. IN REPLY PLEASE QUOTE WED/HB{C. E. Harcombe} 11th March 1924. Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. Dear Sirs, We thank you for yours of the 7th inst. and in reply would say that as the chronograph is fitted with 3 pens, one of these is employed as the time marker, the necessary impulses being supplied by the special contact breaker. It is thus possible to employ two pens for recording purposes, the third giving the time marking for both records. Trusting we shall be favoured with your order for the outfit quoted. Yours faithfully, FOR THE CAMBRIDGE & PAUL INSTRUMENT CO. LTD. | ||