Modern life is awash with comfortable things, some of which were released a century and a half ago. They have become compact, safe, convenient and indispensable.
10. Roller skates
Sport equipment. Used for outdoor activities. In the past, they were shoes to which a frame was attached, in which from two to five, six ears were fixed.
Written references to them date back to 1743. The first boots on wheels are displayed on the engraving of 1870. The first patent for such shoes was received in Paris in 1819. The wheels in them were arranged in pairs, two-wheeled.
Actually roller skates were invented by Peter Kretov in 1946. The famous choreographer did not assume that his desire to make the number interesting would be approved by the audience. The master mounted ball bearings in ordinary skates. And a wonderful opportunity appeared to ride the stage like a skating rink.
Currently, roller skates are used in fitness, friskey, slalom. Extreme skating in the city, roller skating, figure skating. Hockey, off-road skiing in the countryside. Skating from the hills. Everything is subject to the brave roller skaters.
9. Toaster
One of the indispensable kitchen appliances, designed for frying various types of bakery products. Surprisingly, the first toaster was invented a very long time ago, in Scotland in 1893.
The bread was baked earlier, laying it in an iron mesh. Scientists who for many years were engaged in the improvement of the device spent their efforts on the development of an electric heater. It was necessary that the device did not burn out, and the products had a presentation.
Of course, the first toasters did not have timers, it was necessary to be near them so that the bread did not burn. Mistresses advocated that cooking was done without smoke and fire.
Today, manufacturers have taken into account all interests. The only question is how much money the consumer is willing to spend on an electric device.
8. Life vest
Everything is simple. This is a device for supporting a person in water. It has a bright orange color. It is filled either with foam or air.
For life vests, European standards are provided, with the division of devices into four categories. A mandatory requirement is that the swimmer's respiratory system should be located at least 12 cm above the water level without active movements of his arms and legs.
The International Convention for the Salvation of Human Life at Sea SOLAS has even more stringent requirements. The infamous Titanic had inflatable life jackets.
Children's life vests, dated 1925, were made of bicycle tires. Organizations involved in saving people on the waters recommend always having a vest with them, regardless of age and ability to swim.
7. Calculator
An electronic computing device for performing operations on numbers or algebraic formulas. Currently, the simplest calculating machines are widespread.
Without them, no one thinks of going to the store, especially today, when the VAT figures slightly increase the purchase price. In demand are engineering, accounting, financial, programmed, graphic, printing calculators.
The era of modern calculators began with the arithmometer of the French scientist Pascal in 1643. The car had the name "Pascalina." She knew how to work with numbers up to 9,999,999. Add and subtract. Commercial success descended already in 1820, when the first mechanical calculator was patented.
6. Lawn Mower
Machine for cutting grass. The first units were made of cast iron, they were two cylindrical drums. Mass production started in 1832 by Ramsomes.
It is interesting that this company today produces garden equipment. The first mechanized models were driven by horse traction. Subsequently, they began to produce lawn mowers with a gasoline and steam engine.
Landscaping today will not surprise anyone. Without lawn mowers, it is almost impossible to maintain the beauty of lawns, especially in large areas. Today they are launched either by an electric or gasoline engine.
5. The washing machine
One of the most necessary things of a modern house. The first washing machines were a wooden box with a movable frame inside and a manual drive. The appearance of these household units led to the abolition of such a difficult profession as a washerwoman.
The present century is the century of rethinking everything that was known before. Were classified and washing machines. Activator and drum, automatic and semi-automatic, vertical and frontal - by type of load. By weight of dry laundry. Wall and floor. Equipped with timers. Wonderful home helpers.
4. TV tower
In fact, the tower on which the transmitting antennas of the television and broadcasting transmitters of the television transmitting center are installed. They are built at the highest points of the terrain. TV towers are a landmark in cities. They are usually equipped with viewing platforms.
The Stuttgart TV Tower is the first reinforced concrete television tower in the world. The total weight of the tower is about 3,000 tons. Total height 216.6 m.
One of the most famous towers in the world is located in Tokyo. Its height is 634 meters. Weight - 4000 tons.
The Eiffel Tower is made of metal. Currently, its height along with the antenna reaches 324 meters. Gross weight is 10100 tons.
3. The printer
Translated from English from the word "print". A printer is an external peripheral device of a computer designed for outputting text or graphic information on paper or polymer film.
The first printers began to work in the 50s, when the evolution of typewriters began. These were dot matrix printers. They were replaced by laser, and then inkjet devices.
The classification takes into account printing capabilities, principles of image formation, color solutions, principles of interface connection. Currently, there are wireless printers for wireless communications.
2. Hard drive or hard drive
The second name of the hard drive is a hard drive. It is a storage device based on the principle of magnetic recording. The first hard drive appeared in the computer in 1956. He weighed more than 900 kg and was similar in size to a large refrigerator.
Over the years, both the size of the hard drives and the amount of their memory have changed significantly. Currently, the hard drive is 14 TB, an increase of up to 16 TB is planned.
1. Laptop
The history of the creation of laptops takes you back to 1968. It was then that the idea of creating portable computers appeared. They must perform all the same tasks as desktop computers.
It includes a display, keyboard, touchpad, batteries, in order to be able to work autonomously, low weight and dimensions. They must be equipped with a WIFI device.
There are currently two classifications of laptops that complement each other. The first is based on the purpose and technical characteristics of the device, image-based - high quality and very high price, gaming, multimedia, etc., the other based on the size of the diagonal of the display.
From 17 inches or more, to a device with a screen diagonal of less than 7 inches, the so-called palm computers. The second name is personal digital secretaries.
Life flows at the speed of light. This is the movement of people around the world, high professional requirements, document storage, reading books. Everything is possible.