Tungsram

On 13 December 1904, Hungarian Sándor Just and Croatian Franjo Hanaman were granted Hungarian patent no. 34541 for the world's first tungsten filament bulb that lasted longer and produced brighter light than a carbon filament. The co-inventors licensed their patent to the company, which came to be named Tungsram after the eponymous tungsten incandescent bulbs, which are still called Tungsram bulbs in many European countries. In 1934, Tungsram incorporated a patent by Imre Bródy for bulbs filled with krypton gas, providing for a longer bulb lifetime. During World War I mass production of radio tubes began and became the most profitable division of the company.[1]

In March 1937, the first television experimental broadcasts of still images (Tungsram trademark and Mickey Mouse) began in the Tungsram laboratory, initially with low FPS. With the help of the charge storage video camera developed by the company, a successful continuous motion picture transmission was already tested in an experimental TV broadcasting station at Újpest in June 1937.[2]

Hungarian physicist Zoltán Bay together with György Szigeti pre-empted led lighting in Hungary in 1939 by patented a lighting device based on SiC, with an option on boron carbide, that emitted white, yellowish white, or greenish white depending on impurities present.[3]

British Tungsram Radio Works was a subsidiary of Hungarian Tungsram in pre-war days.

In 1990, General Electric acquired a majority stake in Tungsram and over six years invested $600 million in the venture, thoroughly restructuring every aspect of its operations. To date, this has been the largest manufacturing investment by a U.S. firm in Central and Eastern Europe.[4] Thereafter Tungsram operated as a subsidiary of General Electric and the name merely was retained as a brand.

As of February 2018, the CEO of GE Hungary, Jörg Bauer agreed to buy GEʼs lighting business in Europe, the Middle East, Africa and Turkey, as well as its global automotive lighting business. The business continues to operate again under the name Tungsram Group.[5]

Since February 2020, the business partners of the company have been able to use the recently opened Tungsram Lounge at the Ferenc Liszt International Airport with conference rooms.[6]

In April 2022, Tungsram laid off 1600 employees and then in May they filed for bankruptcy protection.[7] In November nearing the end of the six month protection period they announced they had been unable to come to an agreement with their creditors and were thus going into liquidation.[8] As part of the liquidation process it was decided the Zalaegerszeg plant would continue to operate under the name Scintilla Fémalkatrész Kft.

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  Hungarian advertising of the Tungsram-bulb from 1906. This was the first light bulb that used a filament made from tungsten instead of carbon. The inscription reads: wire lamp with a drawn wire – indestructible
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  Incandescent light bulbs with carbon filaments (left) and the modern tungsten bulb (right)
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  Tungsram MR-X radio transmitter tube for audio communication (1917)
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  Tungsram H2 radio transmitter tube prototype 1916
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  Tungsram searchlight for air defense (1914)
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  Tungsram television prototype in 1937
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  Tungsram commercial vacuum tubes from the 1970s
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  Tungsram vacuum tubes
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  Tungsram vacuum tubes
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  The factory in Budapest in 1920
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  Former Headquarter of the United Lightbulb and Electronic Ltd
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  Tungsram vacuum tubes
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  Tungsram vacuum tubes
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  Tungsram vacuum tubes
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  Tungsram vacuum tubes

• Tungsram SC (sports club)

• Free English language book about the detailed history of Tungsram: (in English)
• Patent US1018502, Incandescent bodies for electric lamps