1746 – Leyden jar

A leyden jar is a device that stores static electricity in a glass jar with some kind of conductor/electrode inside the jar to store the charge and some kind of electrode outside the jar to enable charging and discharge. A simple form of the leyden jar is often constructed with a piece of folded tin foil hanging over a metal electrode. When the other end of the electrode makes contact with a charged device, some of the charge transfers into the jar and when the tin foil become charged, the two parts spread apart as the like charges repel each other.

The leyden jar is a forerunner of the electronic capacitor which also stores electric charge.

German scientist von Kleist and Dutch scientist van Musshenbroek independently invented the leyden jar nearly a hundred years after Otto von Guericke invented the first known friction generator. Daniel Gralath later combined several leyden jars to create a primitive battery.

Von Guericke


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