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Unknown functions of known things (18 photos)

It often happens that we are not quite familiar with the subjects that we can use in our daily lives. Sometimes they have hidden functions, and it is about them that will be discussed later.

Hole in the porthole

Many people in flight pay attention to a small hole at the bottom edge of the porthole. Someone even thinks that it is leading out, because the window is drawn by the cold and around the vent a round frosty pattern is often formed.

In fact, the fuselage is, of course, airtight. The porthole is a single-chamber double-glazed window, in which the outer glass is one-piece, and in the inner one a half-millimeter diameter hole is made. Passing air back and forth, it helps to balance the pressure in the air chamber between the glasses with pressure in the cabin.

If it were not for this tiny vent, then because of pressure drops in the cabin during takeoff and landing, the inner glass would be subjected to destructive deformation. The plane would have remained without insurance in case of damage to the outer glass.

The windows of the porthole, of course, are not ordinary, as in our houses. This is a thick panel of high-strength acrylic plastic, able to withstand a huge difference in temperature and pressure overboard and inside the cabin. If the outer glass for some exceptional reason breaks, then the inner glass will take on its role. The presence of a through hole is not a problem. The pilots will have enough time to descend to a safe height.

To prevent passengers from damaging the acrylic plastic or plugging the vent, the glass unit is protected from them by a thin plastic partition that can be touched. This partition is mistaken for the glass of the porthole itself.

Hole in a ladle for spaghetti

Thousands of foreign sites, and after them the whole RuNet argue that this is a simple and ingenious way to accurately measure a serving of spaghetti per person. Like, how many fit in the hole, so much and you need to cook, so as not to be mistaken.

But, maybe you will be interested in the fact that the real pasta gurus – Italians – authoritatively declare that this is the bullshit of a gray mare. When the Italian newspapers, unable to resist, also decided to open their “secret” to the readers’ holes in the ladle, they all raised them to laugh.

“Maybe you will say that with its help it is convenient to sift rice? Or weigh peas? Or wash the ice? ”

” If the newspaper pays me, I’ll write a whole article about the use of a hole in a donut! ”

Judging by the comments, Italians generally throw back spaghetti in a colander, and do not get out of the water with a ladle. And those who still do it, categorically state that the hole serves only to drain the water.

And here are at least two proofs that the Italians are right.


In 1957, a certain Robert Nelson of Chicago patented this “appliance for serving food”, in which there was initially no opening.

It was supposed that it would be convenient for them to scoop not only spaghetti and pasta, but also a lot of other products – chopped lettuce leaves and vegetables, spinach, sauerkraut, beans, peas, corn, etc. And the jagged ladle without a hole allowed if necessary to save juice or dressing. And if it was necessary to drain the liquid, it was done through the gaps between the teeth pressed against the wall of the dishes.

Almost half a century later, in 2003, the German Rolf-Günter Schülein patented a new design for the same device. Now the scoop is intended only for spaghetti and has a hole for draining the water. Notice, it is oblong that it sweeps away its “measuring” function.

Serving size

By Italian standards, the norm for one person = 80 g (naturally, in raw form). Western dieticians recommend a smaller portion – 75 g. However, 100 g of spaghetti of standard 25-cm length can easily be placed in the ladle hole. And if you measure the original Neapolitan spaghetti length of 50 cm, then it will leave 200 grams.

Although, in principle, you can and adjust to measure your portions in this way. At least, it’s funny.

Head restraints in the car

In addition to the obvious function of protecting the head and neck from uncontrollable traumatic jerks in a collision, the Japanese clever men discovered yet another vital property of head restraints. If a person is trapped in a car and can not lower the glass, then it is possible to break it with the help of metal pins, with which the detachable headrest is fixed to the seat.

In order for a strong glass to literally crumble itself, you need to push one of the rods to the inside of the door, where the glass usually falls, and then pull the head restraint toward you. Pressure of the pin on the weak lower edge of the glass will lead to the fact that it will burst, and from the opposite end, and the fragments will mostly fall to the surface and not fly into the face. This way of salvation is good because it does not require great physical strength. An elderly person and a fragile girl will cope with the task.

By the way, it was the girl, participant of the Japanese gaming TV show, demonstrated such a way of getting out of the sinking car. Thanks to YouTube, he became the world’s lifhook.

The pompon on the cap

Today all the people, both young and old, wear hats with pompoms. But right up to the second half of the 20th century in Europe and Russia the pompon on the headdress was almost exclusively an attribute of the military. In the XIX century, for example, Russian soldiers and officers of different arms carried woolen pompoms on the shakos, along which it was possible to determine the belonging to the unit.

In the picture, Juncker and the Chief Officer of the Artillery School, the 1820s

The uniform of the times of the Battle of Borodino in the Soviet adaptation of “War and Peace”

But the French sailors wore a pompom on the cap for a décor: he protected his head from accidental strikes in tight ship compartments with low ceilings. Later, when ship spaces became more spacious, the need for this disappeared, but the pompon is still part of the sea uniform as a tribute to tradition.

In general, if that, know that a tight pompom on the cap is quite capable of protecting the head during the lively winter games.

The hole in the handle of the frying pans

And finally again the “leaky” plot. Sincere cooks suggest that the hole at the end of the handle in the buckets and pans, for which they are suspended to dry, is as if nothing more than a “built-in” holder for kitchen tools. Secure the spoon for stirring and be calm that drops from it will fall back into the bucket, not on the stove or table.

True, in the second case the construction looks unconvincing. But, can, at you it will turn out better?

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