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Electro-ballistic apparatus for measuring the speed of cannon-shot, 1864. Creator: Unknown
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Electro-ballistic apparatus for measuring the speed of cannon-shot, 1864. Creator: Unknown
Electro-ballistic apparatus for measuring the speed of cannon-shot, 1864. Apparatus invented by Major Navez, of the Belgian Artillery. 'Upon the gun being fired, the projectile cuts the wires of the first screen, and thus demagnetises the electro-magnet which holds up the pendulum. This latter commences to fall, and the index-needle with it along the graduated arc. When the second screen is cut through by the shot, the electro-magnet at the top of the conjunctor is demagnetised, and the weight falls into the mercury pressing down the steel blade, and completes another electric circuit, which magnetises the large magnet in rear of the pendulum, and clamps the index-needle against the scale on the arc. The operator then reads off the scale the distance which is marked by the index, and the time thus measured is that which the shot took to pass through the screens, minus the time necessary for the weight to fall in the conjunctor, and which the operator, before commencing, finds by means of the disjunctor...a skilful operator is able to measure...to the three-thousandth part of a second. Such wonderful precision renders this instrument most valuable for artillery scientific purposes'. From "Illustrated London News", 1864
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Media ID 38074599
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EDITORS COMMENTS
This fascinating print captures an Electro-ballistic apparatus from 1864, used to measure the speed of cannon-shot. Invented by Major Navez of the Belgian Artillery, this intricate device was a marvel of scientific precision for its time.
The apparatus worked by cutting wires with the projectile as it passed through two screens, demagnetizing electro-magnets and causing a pendulum to fall. The falling weight completed an electric circuit, clamping an index-needle against a scale on an arc. Skilled operators could measure time to the three-thousandth part of a second using this innovative instrument.
The level of detail and accuracy provided by this Electro-ballistic apparatus made it invaluable for artillery scientific purposes in the mid-19th century. It allowed military personnel to precisely measure the speed at which cannon-shots traveled, providing crucial data for improving weaponry and tactics.
This print serves as a reminder of the ingenuity and craftsmanship that went into creating such advanced scientific instruments during this period. It is a testament to human innovation and dedication to pushing the boundaries of knowledge in pursuit of progress.
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