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Oscillograph - LoveToKnow 1911 (1405 words) |
 | In the Duddell oscillograph it is usual to place a pair of loops in the magnetic field, each with its own mirror, so that a pair of curves can be delineated at the same time, and if there is any difference in phase between them, it will be detected. |
| In one form of Blondel's oscillograph, the vibrating system is a small magnetic needle carrying a mirror, but the principle on which it operates is the same as that of the instrument above described. |
| The oscillograph can be made to exhibit optically the form of the current curve in non-cyclical phenomena, such as the discharge of a condenser. |
| Oscillograph - MSN Encarta (0 words) |
| Oscillograph, instrument that records, on paper or film, wave patterns that are equivalent to the oscillations of an electric voltage, or that converts mechanical oscillations into an equivalent electric current before recording them on paper or film in the form of wave patterns. |
| The electromechanical type of oscillograph consists in principle of a galvanometer (see Electric Meters) to which is attached an apparatus that records the movements of the galvanometer coil. |
| The recording apparatus may consist of a mirror that reflects a beam of light from the moving coil upon a photographic film moving at a fixed rate, or it may be a lightweight pen or stylus connected to the coil that writes on a moving paper chart. |
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