Rolls-Royce Archives
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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 describing a newly developed vibration recorder.

Identifier  ExFiles\Box 25\3\  Scan099
Date  16th April 1923
  
X634
TELEGRAMS: INSTRUMENT, CAMBRIDGE.
CODES: A.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}/Rml/LG
CAMBRIDGE, ENGLAND.
IN REPLY PLEASE QUOTE... WGC/IM
16th April 1923.
Messrs. Rolls-Royce Ltd.,
Nightingale Road,
Derby.
Dear Sirs,
Vibration Recorder.
In reply to your letter of the 12th instant, we have recently developed a vibration recording instrument using an entirely new and very simple method of recording. The record is made on transparent celluloid and is viewed and measured in a simple form of microscope. The instrument itself is portable and may be used in almost any position, the records obtained being instantly available for inspection and measurement without the necessity of using any photographic process. For convenience of examination, however, we are sending you some photographic enlargements made from records obtained by this instrument.
The instrument is capable of dealing with a very wide range of periodicities and amplitudes from, say, 10 or 12 per second up to 1000 or more per second, and from tests we have made it would appear to indicate that it should be specially valuable in giving a relative measure of such comparatively high pitched vibrations as those caused by running gears. In the photographic
  
  


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