Contents
Modern life is flooded with comfortable things, some of which saw the light of day a century and a half ago. And continuously improving, they reached the modern consumer. They became 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 shown in an 1870 engraving. The first patent for such shoes was received in Paris in 1819. The wheels in them were arranged in pairs, two-skid.
Actually roller skates were invented by Peter Kretov in 1946. The famous choreographer did not expect that his desire to make the number interesting would be approved by the audience. The master mounted ball bearings in ordinary skates. And there was a wonderful opportunity to ride around the stage like a skating rink.
Currently, roller skates are used in fitness, freeskating, slalom. Extreme skating in the city, roller skating, figure skating. Hockey, off-road skating outside the city. Hill riding. Everything is subject to the brave on roller skates.
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.
Bread was baked before, laying it in an iron grid. Scientists who have been improving the device for many years have 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 marketable appearance.
Of course, the first toasters did not have timers; it was necessary to be near them so that the bread did not burn. The hostesses advocated that the preparation of the dish took place 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 electrical appliance.
8. Life vest
Everything is simple. This is a device for supporting a person in water. It has a bright orange color. Filled with either foam or air.
For life jackets, European standards are provided, with the division of devices into four categories. A mandatory requirement is that the swimmer’s respiratory organs must be located at least 12 cm above the water level without active movements of the arms and legs.
The SOLAS International Convention for the Saving of Life at Sea has even more stringent requirements. The infamous Titanic had inflatable life jackets.
Children’s life jackets, dated 1925, were made from bicycle tires. Water rescue organizations recommend that you always have a life jacket with you, regardless of age and ability to swim.
7. Calculator
An electronic computing device for performing operations on numbers or algebraic formulas. At present, 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 cost of the purchase. Engineering, accounting, financial, programmed, graphic, printing calculators are in demand.
The era of modern calculators began with the arithmometer of the French scientist Pascal in 1643. The car was named “Pascalina”. She could work with numbers up to 9. Add and subtract. Commercial success came as early as 999, when the first mechanical calculator was patented.
6. Lawn Mower
Grass cutting machine. The first units were made of cast iron and consisted of two cylindrical drums. Mass production started in 1832 by Ramsomes.
Interestingly, this company still produces garden equipment today. The first mechanized models were powered by horse traction. Subsequently, they began to produce lawn mowers with a gasoline and steam engine.
Landscaping today will surprise no one. Without lawn mowers, it is almost impossible to maintain the beauty of lawns, especially in large areas. Today they are started either by an electric or gasoline engine.
5. Washing machine
One of the most necessary things in a modern home. 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 laundress.
The present age is the age of rethinking everything that was known before. Washing machines were also classified. Activator and drum, automatic and semi-automatic, vertical and front – by type of loading. By weight of dry laundry. Wall and floor. Equipped with timers. Great home helpers.
4. TV tower
In fact, a tower on which the transmitting antennas of television and radio broadcasting transmitters of a television transmission center are installed. They are built on the highest points of the area. TV towers are a landmark of cities. They are usually equipped with viewing platforms.
The Stuttgart TV Tower is the first TV tower in the world made of reinforced concrete. The total weight of the tower is about 3000 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. At present, its height, together with the antenna, reaches 324 meters. Gross weight 10100 tons.
3. Printer
Translated from English from the word “seal”. A printer is an external computer peripheral device designed to output text or graphic information to 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 the printing capabilities, the principles of image formation, color solutions, the principles of interface connection. Currently, there are wireless printers with a wireless connection.
2. Hard drive or hard drive
The second name of a hard drive is a hard drive. It is a storage device based on the principle of magnetic recording. The first hard drive appeared in a computer in 1956. It weighed more than 900 kg and was similar in size to a large refrigerator.
Over the years, both the size of hard drives and the amount of memory have changed significantly. The hard drive capacity is currently 14 TB, with plans to expand to 16 TB.
1. A laptop
The history of the creation of laptops takes us back to 1968. It was then that the idea of creating portable computers arose. They should perform all the same tasks as desktop computers.
Includes a display, keyboard, touchpad, batteries, in order to be able to work autonomously, low weight and dimensions. They must be equipped with a WI-FI device.
Currently, there are two classifications of laptops that complement each other. The first is based on the purpose and technical characteristics of the device, fashion – high quality and very high price, gaming, multimedia, etc., the other is based on the size of the display diagonal.
From 17 inches or more, to devices with a screen diagonal of less than 7 inches, the so-called handheld 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, storage of documents, reading books. Everything is possible.