25 Sep 1928 was founded the company Motorola. It was originally called Galvin Manufacturing, was established by brothers Paul and Joseph Gallinari, and the first products of the new company was commonplace in those days batteries. The name Motorola was first to wear one of produced Gallinari portable radios — Motorola SCR-300.
Motorola SCR536
In the popular manufacturer Motorola has become already during the Second world war, when the armed forces of the allies began to receive radio SCR536. Waterproof, shock resistant and very reliable, this radio was wildly popular in the 1940-ies.
The legendary RAZR was still more than 50 years, but Motorola is already being used for communication
After the war, Motorola seriously took up the development of cellular communication. The world’s first mobile phone and the world’s first pager (familiar to us, however, only the “new Russians” and the Golden youth) has made this brand one of the pillars of mobile technology.
The idea of a pager also belongs to Motorola
Only then enormous company began to lose his grip under the onslaught of European and Chinese competitors, first Motorola “cut off” and isolated in a separate unit of semiconductor manufacturing, and then from the core business was spun off the business of manufacturing mobile phones, and later Motorola Mobility with all its heritage “went on hands” and was first bought by Google, and after a couple years of generic. However, in spite of all the rough and tumble of the legendary manufacturer is still alive and well, and this is important.
25 Sep 1927 began its work on a telephone cable running under the Atlantic ocean. Thanks to him calls between Europe and America finally ceased to be something exceptional.
Intercontinental cable — a thing fragile
By the time the telephones in European countries was already in full swing, and Russia has once again set new records the length of telephone lines one after the other: first, after the construction of telephone lines between Moscow and St. Petersburg in 1897 (649,68 km), then a record of large-scale communication line between Leningrad and Baku in the same year 1927 (3268 km, by the way!). But to call the USA the world accounted for using expensive and unstable radio channel with a limit of conversations, which is enough unless kings/presidents.
Construction of a modern submarine cable
Strictly speaking, the transatlantic cable from 1927 was not the first — attempts to stretch a Telegraph line along the bottom of the ocean have been made since 1857. But the cable had deteriorated so quickly that a stable connection could not be and speeches. But the laying of Intercontinental communication is wildly troublesome process. Segments with a length of on average 4 kilometers, very heavy (15 tons), even for modern cars delivered to ports only after consultation with a bundle state in the way of padding, and coordination with the meteorological and geological exploration. Even against multi-resistance to damage of modern optical fiber during installation is very easy — sometimes workers have to repair the areas that come into disrepair and lifting the cable from the bottom of the ocean.
The scheme of modern transoceanic communication
September 25, 1945, Soviet parachutist made a record free-fall jump from the stratosphere. Colonel, air force Institute Vasily Romanyuk one jump set two records — the highest (13108,5 metres), and the duration of free fall (167 seconds, almost three minutes at full speed in the air). Romaniuk opened the parachute only at an altitude of 1000 m, after overcame 93% of the distance.
Vasily Romanyuk
This, incidentally, was not the only record of the great Soviet parachutist-test. In 1947 Romanyuk he made the jump from the height of 13400 metres and at this altitude opened the parachute. By that time his experience had 3000 jumps and in the global aviation sports our compatriot did not know equal.
The latest record for long jump was launched into space. In 2012, Austrian skydiver Felix Baumgartner jumped from a height of 36.6 kilometers and the world’s first broke the sound barrier in a jump. The duration of free fall was 4 minutes, 36 seconds. However, in 2014, the altitude record went to the former employee of Google Alan Eustace — he jumped from a height of 41.2 km.
The record jump of Felix Baumgartner in 2012