Yablochkov candle

Jablotschkow'sche candles partly used.

The Jablotschkow'sche candle is a special version of the electric carbon arc lamp. As in the early days of electric lighting technology of the uniform spacing of the carbon electrodes in the operation of the lamps was only imperfectly to ensure Pavel Nikolayevich Jablotschkow constructed in 1876, the " electric candle", named after him, in which the carbon electrodes were arranged in parallel. This made it possible for a control device, which is usually necessary for the operation of arc lamps, omitted. The Jablotschkow'sche candles were used in alternating current and burned evenly. They began to illuminate public spaces, as they were, inter alia, installed in London and in Berlin's main post office on the banks of the Thames. 1878 burned at the end of the world exhibition in Paris in the evening around 1,000 Jablotschkow'sche candles.

The disadvantage was at the Jablotschkow'sche candles is that they burn only about 90 minutes and could only be turned on once. Any interruption of the stream they went out and had to be replaced.

With the invention of the differential arc lamp by Friedrich von Hefner - Alteneck who were relieved " electric candles " and the electric lighting improved. The Jablotschkoff'schen candles were a temporary solution in lighting technology.