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Drawing of Geissler tubes illuminated by their own light, from 1868 French physics book, showing some of the many decorative shapes and colors Modern recreation of a Geissler tube in a museum A Geissler tube is a precursor to modern gas discharge tubes , demonstrating the principles of electrical glow discharge , akin to contemporary neon ...
Johann Heinrich Wilhelm Geißler (26 May 1814 in Igelshieb – 24 January 1879) was a skilled glassblower and physicist, famous for his invention of the hand pumped Geissler mercury vacuum pump in the mid-1850's and in 1857, the Geissler tube, made of glass and used as a low pressure gas-discharge tube; these two inventions were critical ...
Each image was illuminated by a sparking spiral Geissler tube and displayed on a small opal glass window in a wall in a darkened room for up to seven spectators. Different versions were shown at many international exhibitions, fairs, conventions and arcades from 1887 until at least 1894.
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The lamp consisted of a Geissler tube that was excited by a battery-powered Ruhmkorff induction coil; an early transformer capable of converting DC currents of low voltage into rapid high-voltage pulses. Initially the lamp generated white light by using a Geissler tube filled with carbon dioxide. However, the carbon dioxide tended to break down.
Crookes X-ray tube from around 1910 Another Crookes x-ray tube. The device attached to the neck of the tube (right) is an "osmotic softener". When the voltage applied to a Crookes tube is high enough, around 5,000 volts or greater, [16] it can accelerate the electrons to a high enough velocity to create X-rays when they hit the anode or the glass wall of the tube.
The last image we have of Patrick Cagey is of his first moments as a free man. He has just walked out of a 30-day drug treatment center in Georgetown, Kentucky, dressed in gym clothes and carrying a Nike duffel bag.
1904 photograph illustrating interior lighting by the first installation of Moore tubes in a hardware store in Newark, New Jersey. Moore had devised his glow discharge lighting system by 1896. [1] The Moore Lamp was an extension of the well-known Geissler tube, which used glass tubes from which the air had been removed and a different gas ...