Perhaps many people fantasize that their bicycles can appear perfectly on the water, but even today in the 2 1 century, we can't seem to realize the technology perfectly. However, as early as the 1930s, someone invented this kind of equipment.
The bicycle named "Cyclone" was launched in Paris on 1932, and its hollow wheels can be used as floating objects in the water. However, the reason for its failure is also obvious, because it does not have much traction on land or in water. That is to say, this invention is not practical, so it has not been widely used.
2. Inflatable life jackets made of old tires
Life jacket is undoubtedly a great invention, which can help people who fall into the water as much as possible, and is very helpful for those who like to travel and explore at sea. So did they exist in the 20th century? Let's take a look at this photo taken by 1925 in Germany.
This is an inflatable life jacket made of old tires. It can be seen that people's imagination was admirable at that time, but this way of winding a bunch of tires around their bodies looked a bit funny on the one hand, and it could not bring good floating effect on the other. But it was people's many attempts in the past that led to the progress of materials and the emergence of modern life jackets.
3. Wooden bathing suit
Women's swimsuits used to be conservative. It can be said that swimsuits have been developed for many years. After people's acceptance has changed and the materials have been greatly improved, there is today's swimsuit.
In the 1920s, there was a crazy invention similar to the tire vest in America. Although it looks strange, these spruce swimsuits are real. Their purpose is to create a floating effect for swimmers who were not very skilled at that time. But its effect is not good, and it may also bring discomfort to the human body because of root thorns.
4. Electric jacket
In cold weather, we want to provide warmth for ourselves as much as possible. And a coat that can heat your body will be a garment that many people need. In fact, in the 1930s, there appeared a kind of coat that can heat itself, and it also uses electricity. However, once you want to use it, you must find a place where you can supply electricity.
In other words, you can't use it while walking, anytime and anywhere. Therefore, it is not practical and can only be limited to certain occupations. But in modern society, similar inventions have appeared, such as an electric jacket called Flexwarm, which can not only heat the body when walking, but also be connected with a mobile phone and controlled by it.
5. Sunglasses were in the past
This kind of sunglasses, also known as "snow goggles", is mainly used by Inuit and Yupik people near the North Pole to prevent snow blindness. The history of this unique sunglasses can be traced back to 2000 years ago. It is traditionally made of spruce, bone and sometimes ivory. In the past, some people even used a mixture of soot and oil outdoors to reduce glare.