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).
The modification of an oscilloscope to make it a self-contained, portable unit.
| Identifier | ExFiles\Box 53\1\ Scan036 | |
| Date | 10th July 1923 | |
| Sent to Mr Longe for B.B. EFC {E. Fowler Clarke - Electrical Engineer} 4/T10.7.23. X.4541 - RE OSCILLOSCOPE. The oscilloscope which we obtained some months ago has been put into use during the last six weeks, and it is proving itself to be a very convenient piece of apparatus. We have found it more convenient, however, to make this a self-contained unit, in such a way that it is not dependent upon a coupling to the engine. In order to do this we have arranged the oscilloscope to be driven by a small chassis generator used as a motor from two 12-volt batteries in series, with the necessary controls and switches and can get a very fine speed regulation this way. The whole apparatus is arranged on a truck and can readily be moved about and used on any job. The principle of the thing, of course, is by no means new to us and we have previously made a number of similar investigations using the light from a magneto operated spark, intensified in brilliancy by the use of a H.T. condenser, either arranging the magneto so that the magnets can be rotated, or chain or gear driving this in such a way as to produce the relative creep. The great thing about the oscilloscope unit as now in our possession is a convenience of having something ready for any job and also there is a definite advantage in the method of illumination of the moving parts as compared with the illumination obtained from a spark. We think the above will show what we assume is required, namely, that we are deriving great benefit from the use of this apparatus. EFC. {E. Fowler Clarke - Electrical Engineer} | ||