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.

Isothermal bottle In the USA The first bottle and glass factory in the USA was founded in 1608 in Virginia. In the 1800s, new variations of the glass bottle appeared. The baby bottle, for example, was patented in 1841. However, the concept was not new. In ancient times, babies were fed with a bottle with two openings. One opening was used to pour the liquid into the bottle and the second opening was placed in the baby's mouth. The 16th century bottle looked like a duck; the baby was fed through its beak. Glassblower John L. Mason designed the first glass jar with a screw top in 1858, the now famous Mason jar. In the mid-19th century, Dr Hervey Thatcher invented the glass milk bottle. The Coca-Cola Company introduced the first soft drink bottle in 1915. Several other brands followed, each with its own distinctive bottle shape. The shape and weight of soft drink bottles were standardised after 1934", but standardisation is relative, as each brand differs in its design and increasingly in the contents of the bottle. "The bottle manufacturing" process was first automated in 1865 with the introduction of a press and blow machine. An isothermal bottle to personalize has become essential! You will find that at Gifts-custopolis.com for sure. Birthday gifts, birthday gifts for, unusual birthday gift, gift idea for, gift idea for personalize

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…

1271: An imminent invention In 1941 Lynn Thorndike published a text of great importance for the history of mechanical clocks. This text - probably the earliest record of clocks, dated 13 April 1271 - concerns a commentary by Robert the Englishman, known as Robertus Anglicus, on The Sphere of Sacrobosco, which states in brief: That a wheel which can turn uniformly over twenty-four hours (to give the equinoctial hours) has not yet been perfected;but that the researches of the clockmakers were going in that direction. Robertus then proposed a wheel driven by a weight (without mentioning the problem of accelerating the movement of this system). This means that the mechanical clock was still in the research stage at that time. In simple terms, the year 1270 can be considered as the "earliest" date of this invention, which in scientific terms is called "terminus ante quem non". "The switch to mechanical time did not translate into language", it did not lead to a change in terminology: the term horologium was simply retained, as for water clocks. While the increasingly frequent references to "horologia" in parish registers suggest that a new technology was emerging at the time, the difficulty of interpretation is still at the forefront: are they hydraulic or mechanical "horologia"? Request a clock as a gift dedicated to the day of the lovers with the possibility of choosing a decoration among a rather large choice of images, constitutes romantic gift ideas, to personalise romantic gifts, Unique Valentine's Day gift ideas in shortvalentine's day gifts for him and her

"Charlemagne's "Clock In 806, Charlemagne was presented with a prestigious horologium by an ambassador of the Abbasid Caliph of Baghdad, Haroun ar-Rachid; this clock, whose automata are often described in detail, is sometimes considered a mechanical clock. Located in the northern part of the Champ-de-Mars (Rome), halfway between the Mausoleum of Augustus and the Pantheon of Agrippa, this monument, inaugurated in 10 BC, was unique in its size in antiquity. It was a gigantic sundial, occupying a large square of 150 by 70 metres, paved with marble and bearing astronomical graduations and bronze inscriptions, some of which have been found. Eginhard, Charlemagne's chronicler, described it in the 800s as follows: "A machine which, driven by the motive power of water, marks the hours by an appropriate number of small bronze balls which fall on a brass gong; at the end of each hour, a rider comes out of one of the twelve windows, which is open at first and then closes behind him." Later, Pacificus of Verona, who died in 844, is also credited with the invention of a clock, considered the first mechanical clock. His horologium nocturnum was in fact only an observation tube that bore some resemblance to the nocturlabe depicted in one of the astronomical manuscripts in the library of the abbey of Mont-Saint-Michel; this affinity is still found in 20th century encyclopaedic sources. 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.

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

Sundials and obelisks Ancient Egyptian obelisks, built around 3500 BC, are also among the oldest ghost clocks. The oldest known sundial comes from Egypt. It dates from around 1500 BC. Candle clocks The first mention of candle clocks comes from a Chinese poem written in 520 AD. According to this poem, the graduated candle, whose burning rate was measured, was a means of determining the time of night. Similar candles were used in Japan until the early 10th century. Hourglass Hourglasses were the first reliable, reusable, reasonably accurate and easily manufactured time measuring devices. From the 15th century onwards, hourglasses were mainly used to tell time at sea. An hourglass consists of two glass spheres connected vertically by a narrow neck that allows a controlled flow of material, usually sand, from the upper sphere to the lower. Hourglasses are still used today. They were also introduced for use in churches, industry and the kitchen. Candle clocks were another timekeeping device used in the ancient world, from China to England to Mesopotamia. Chronometers were developed in places like India and Tibet and the hourglass (which was widely used throughout Europe) came a little later. Receiving a clock for your birthday with a decoration dedicated to a specific birthday, whether you are 20, 40 or older, is great : 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.

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