3 April - Tuesday
World Party Day
1860 Regular trans-continental postal service "Pony-Express" opened in the USA
1892 Birthday of ice-cream "Sande"
1933 Russian surgeon Yuri Voronoi performed the world's first kidney transplantation surgery
1973 Birthday barcode
1973 Mobile phone's birthday
April 3 is considered the birthday of a mobile phone.
Internet access, social networking, messaging, photo, audio and video, e-mail, photo and video, navigation, gaming, built-in calculator, flashlight, calendar, clock, alarm clock, stopwatch, voice recorder, radio, video player, barcode scanner. Yes, no one could even think 30 years ago that all this and not only will be combined in one device, which is placed in the pocket, and its primary primary function is that voice communication will become only one of many functions, and for a significant part of users not always the main one. Mobile phone today is actually a mini-computer, which is very firmly entered into the everyday life of ordinary citizens.
When the telephone apparatus appeared in the 19th century, it was something of a fantasy field. However, submarines, airplanes, rockets and space exploration also belonged to the category of fiction or fairy tales up to a certain point. The fruits of the rich imagination, realized in literary creation, often became the engine for scientists, researchers and inventors.
In 1910, an American journalist predicted the appearance of a telephone set, which will not be permanently attached to the base, that is, it was a mobile phone.
This idea was picked up in the first post-war years by AT & T and its research center Bell Laboratories. At the same time, work was also being done on the creation of a cellular communication device in Motorola.
The iconic event, which later became the Birthday of a mobile phone, occurred on April 3, 1973. That day, Motorola's engineer Martin Cooper made the first call on his mobile phone. His first phone call to Motorola DynaTAC 8000X, he made a friend in a competing company Bell Laboratories, clarifying immediately that he was talking on his mobile phone.
Martin Cooper has worked in telephony and mobile phone development for a long time, starting with the creation of mobile phone sets for cars. Similar units weighed in the order of 13-14 kg. So the new device, by which the call was made by Cooper, weighing just under 900 grams, was a real technological breakthrough.
Tell someone today about a cell phone weighing almost a kilogram, with a body length of about 22 centimeters, as well as a width of about 4 cm and a thickness of about 12 cm - not everyone will believe in such a "miracle". And then, in 1973 - it really was a miracle, although the battery life was about 30 minutes, and its charging time is about 10 hours!
Further events developed much faster. The prototypes of the mobile phone turned into commercial ones and entered the market successfully, despite the huge price of over $ 3,500 per device.
In addition to Motorola, the development of mobile phones and their further development began to connect new manufacturers, brand names which are now heard by every inhabitant of the planet. In this field, such companies as Nokia, Siemens, Philips, Sony, Ericsson, Benefon, Sharp, Samsung, LG, Apple have left a notable contribution.
The development of technologies has steadily led manufacturers along the way of reducing the size of mobile phones, increasing the capacity and performance of their batteries, and then processors. Cell phones learned various variants of form factors: candy bar, flip, clamshell, slider, side slider, smartphone and others.
Strongly incorporated into the everyday life to the point that already a separate topic of discussion and research is the negative impact of cellular phones on human health, as well as its safety under certain conditions, mobile phones have nevertheless become an integral part of our lives. So the date of April 3 has the right to exist, being a landmark event in the history of inventions of the 20th century.