Insulated bottle In the United Kingdom 1892, the Dewar vase The Scottish chemist and physicist Sir James Dewar (1842-1923) was the first to produce liquid hydrogen, which was the coldest substance ever produced. To store this cryogenic material at very low temperatures, he constructed insulated boxes from cork, hay or crumpled newspapers, but none of these solutions held the liquids sufficiently. He then discovered and improved the Arsonval vessel. In 1892, he proposed his version of the double-walled glass vacuum flask that bears his name, the Dewar flask. It takes the form of a glass balloon with a straight neck. The narrow space between the two walls is almost entirely free of air, this partial vacuum prevents heat conduction and convection for better insulation. He added silver as a metallic coating to prevent radiation. This invention eliminates any possibility of heat transfer by conduction, convection or radiation. He hired a professional glass blower to make a stronger balloon. In 1898, he used this container to transport and introduce liquid hydrogen to the world. An isothermal bottle to personalize it has become mandatory! You will get that at Gifts-custopolis.com undeniably. Unusual gift for, kdo idea for, customizable gift idea, birthday gifts for, unusual birthday gift.

Stainless steel vacuum flask The stainless steel vacuum flask is still quite often called."Thermos" by a number of people."Thermos" is a term that has become a common name today in the Cambridge dictionary. It is the company Thermos L.L.C. that has registered and is registering the thermos trademark. It is thanks to Sir James Dewar, a chemist and physicist of his time, who discovered the production of liquid hydrogen and therefore imagined a vase to preserve the temperature of the product which later became a vacuum flask. Sir James Dewar made an insulating container, called "the Dewar Vase", to be able to confine liquid hydrogen at very low temperatures. The container has two glass walls, separated from the outside by a vacuum, in which the liquid hydrogen is placed at low temperature.This makes it possible to reduce the temperature loss in relation to the surrounding environment. To be able to observe the photo of the family dog, of its newborn grandson or of the beach where you have spent an unforgettable holiday is a unique privilege that you can obtain thanks to this vacuum flask that we customise for you. It is a unique gift for a birthday, Christmas party or retirement or simply when you want to bring your personal coffee to the office.

13th century. Mechanical clocks began to develop. More than thirty testimonies are quoted from all over Europe at the end of the 13th century. In these texts we find the purchase of iron and weights and the acquisition of expensive clocks in monasteries, cathedrals and princely residences. These prices were often considerable: six marks for the clock of the monastery of Colmar in 1278, thirty pounds for that of Canterbury in 1292, fifty pounds for a simple repair or transformation of the clock of the cathedral of Sens in 1319. Gradually, the mechanical clock, whose movement is permanently maintained by a motorised weight, replaced the boring water clock that had to be constantly cleaned and filled or emptied. It seems that these early clocks - like the water clocks - were first intended to strike a particular time (e.g. alarm clock) and a little later to strike different times of the day; these clocks were "blind": they had no dial! The striking mechanism was operated by one or more pins on a wheel of the mechanism. This transfer of technology from hydraulic to mechanical power enabled the original purpose of the clock to be retained: the striking of a precise hour; this invention has therefore remained practically anonymous. It was not until a little later, in 1336, that an important innovation changed the history of clock-making: striking clocks. A clock with a reproduction of the top 10 works of art are unusual artwork ideas,cute artwork gift ideas , perfect to buy a artwork gifts and unusual to personalise artwork gifts, special artwork gift ideas, to personalise artwork gifts for…best artwork gifts for… unique artwork gift for…

Mechanical clock A mechanical clock is a time-measuring instrument that tells the time by an originally entirely mechanical action. It is based on the combination of three functions: a driving weight for the rotary movement, a regulator such as a balance wheel and a display (a graduated scale and hands). The mechanical clock is the successor to the various horologia. The Romans, and before them the Egyptians and Greeks, had already developed time-measuring instruments that demonstrated great astronomical knowledge. The invention of the mechanical clock can be placed around the 1300s and appeared in Western Europe at the end of the 13th century. Originally, it was a weight motor and foliot. A foliot is a vertical pendulum that controls the energy supplied to a wheel by a weight. The motion is then transmitted to gears that drive the movement of the hands. A weight suspended from a rope provides energy to the machine, while a system of rods and foliots periodically interrupts the fall of the weight. By placing the weights at each end of the foliot, the rhythm of the back and forth movements can be adjusted. The low precision of this mechanism, from 1 to 2 hours of deviation per 24 hours, renders the minute hand useless, and it will undergo a long evolution and an important diversification over the centuries. Having a clock as a birthday gift with a decoration dedicated to a specific birthday, 20 years, 60 years or more, is fun: unusual gifts for birthday, best anniversary gift ideas and unique anniversary gift ideas for an event that is celebrated every year and that will remain unique.

Greek water clocks An early prototype of an alarm clock was invented by the Greeks around 250 BC. The Greeks built a water clock, called a clepsydra, where rising water told the time and eventually struck a mechanical bird that set off an alarm whistle. The water filled a tank with an hour scale inside and flowed out through a hole in the base of the container. Clepsydras were more useful than sundials - they could be used indoors, at night and even under cloudy skies - but they were not as accurate. Greek water clocks became more accurate around 325 BC and were fitted with a dial with an hour hand, which made reading the clock more accurate and practical. Monastery clocks and clock towers The life of the Church, and in particular the monks who called others to prayer, made chronometers a necessity in daily life. The first clockmakers in medieval Europe were Christian monks. The first recorded clock was built by the future Pope Sylvester II around 996. Much more sophisticated clocks and church towers were built by monks later. Peter Lightfoot, a 14th century Glastonbury monk, built one of the earliest surviving clocks, which is still in use at the Science Museum in London. Getting a birthday clock from a family member or friend is cool : unusual gifts for birthday, best anniversary gift ideas and unique anniversary gift ideas that will always be in time for a family gathering or with friends

Clocks Since time immemorial, people have tried to tame time. Thanks to scientific discoveries and technical innovations, the measurement of time has gradually been mastered. For thousands of years, people have measured time in a variety of ways, including following the movements of the sun with sundials, using water clocks, candle clocks and hourglasses. Our modern basic 60 time system, a clock with periods of 60 minutes and 60 seconds, dates back to 2000 BC in ancient Sumeria (the southernmost region of ancient Mesopotamia). History of clocks; "Time is money", they say, but the history of clocks is long and fascinating. The measurement of time is one of the earliest developments of mankind and time has changed greatly since ancient times. The birth of clocks to measure time: A clock is a time-measuring instrument that usually tells the time continuously. The word comes from the Latin horologium, "that tells the time", itself derived from the Greek ὡρολόγιον (formed from oρα, "time", and λέγειν, "to tell", λόγιον, "to tell"). Since ancient times, the Latin term 'horologium' has been used to refer to any instrument capable of indicating time, which has often led to difficulties in interpreting ancient texts. Thus, a sundial, a water clock, an astrolabe, a nocturlabe, a mechanical clock were called "horologia". A clock with a photo of your holiday by the sea, in the mountains or in the countryside. There's nothing better to cheer you up when the holidays are over or when the weather is not good. These are custom photo gifts, photo gifts ideas, to personalise gifts photo, to personalise with photos

Do you find that the clocks sold in stores are not to your liking or lack of personality? You seem to see the same wall watch everywhere. Look no further, you can customize this clock as you wish. We print on the dial a photo or a text. Dig into your best photos and select one of a loved one or a place you love. You love animals take a nice photo of a horse, a pony during your walk or photograph your little four-legged friend. The custom clock is a deco idea to give a fun touch in the home, office, waiting room or any other place. The personalized watch is a great idea to offer a unique and useful gift. A nice photo of your children or your family to offer your parents, grandparents, your godfather or godmother ... a pretty image free of rights with the first name of your daughter or your son to individualize his room which will be decorated according to his personal tastes. The logo and name of your company to decorate your premises while giving the time. A proverb or motto to show your ideas, your convictions or a hilarious quote to amuse your friends. Everything is possible.