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The first Siemens vacuum cleaner came onto the market in 1906 with the name "Dust suction pump" and weighed three hundredweight. The first portable fan-driven vacuum cleaner followed in 1924, and was followed seven years later by the "whispering" Protos.
Siemens presented its first radio, with a three-stage tube set, when radio broadcasting began in Germany in 1923. It was known as the Siemens D-Zug ("express train"), and consisted of an HF amplifier, an audio detector and an LF amplifier and was operated with a horn loudspeaker.
The first appliances comparable to today's electric cookers came onto the market in 1925. The first electrical washing machines made their appearance around the same time. In 1928, Siemens presented the Protos turbo washing machine, a drum-type machine which could both wash and spin-dry its load.
The five-circuit four-valve superheterodyne radio receiver, known as the Schatulle (cash box), was introduced in 1935 and soon acquired the nickname "gentleman in evening dress". It was distinguished by its exceptional tuning precision and had an automatic fade compensation function, as well as an electrodynamic loudspeaker.
The Fe 3 television set from Telefunken had black and white reception with a resolution of 180 lines and a frame repetition rate of 25 pictures per second. The screen measured 18 x 22 cm. The set had to be individually ordered and cost 1,800 Reichsmarks.
In 1964, the first Siemens dishwasher came on the market. At last, there was an alternative to the chore of washing dishes by hand and the inexorable rise of the dishwasher began. Only three years later, Bosch-Siemens-Hausgeräte GmbH (BSH) put the first dishwasher with stainless steel compartments on the market, thus guaranteeing a long life for the machine.
The Aquastop system, introduced in 1985, increases the safety of dishwashers and washing machines. This integrated safety system reliably prevents water damage caused by bursting, leakage or the parting of the water supply hose from the machine.
Modern electric cookers consume 16 percent - and in combination with microwave cookers up to 50 percent - less electricity than they did as recently as 1980. With the glass ceramic cooking surfaces, extendable infrared cooking sensors measure the temperature in the saucepan and thus maintain the desired temperature with great accuracy. This means the lid can be kept on the saucepan all the time - which reduces the consumption of electricity by up to another 80 percent.
In 2010 the dishwasher ecoStar2 is the world record holder in energy efficiency. It is 30 percent more efficient than the standard for Energy Efficiency Class A requires. And with seven liters of water per cycle it uses almost half of what conventional models go through while consuming only 0.73 kilowatt hours of electricity. This level of efficiency is made possible by the award-winning zeolite technology developed by Siemens.