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 Cambridge Instrument Company describing the features and sensitivity ranges of an instrument and an enclosed photo of a new projector.
| Identifier | ExFiles\Box 175\4\ img150 | |
| Date | 25th October 1933 guessed | |
| Continuation Sheet No...... 1 CAMBRIDGE INSTRUMENT COMPANY, LIMITED. by a group of persons as soon as they are taken and the records are simultaneously visible by all parties discussing them. In addition the ground glass screen can be removed and a photographic slide inserted instead, and in a few minutes a photographic print on paper of the record is secured when required. Taking present instrument with the third sensitivity range, a movement of 3° would be about the maximum movement permitted in the instrument and would give a deflection of 6 mms on the celluloid record or 60 mms. on the screen. The first range would be a quarter, the second range half, and the 4th range would be twice the sensitivity of the third range. You will see, therefore, that our instrument fully covers your requirements. Our London Sales Office will send you a quotation of our latest equipment by a later mail. We enclose herewith a photo of our new projector both open for use and closed for transit. We think the photo will be self-explanatory with what we have stated above. Yours faithfully, FOR CAMBRIDGE INSTRUMENT CO LTD. Mason JOINT MANAGING DIRECTOR | ||