Wall Clocks Review
Archive for the ‘Hourglasses’ Category
Since its creation the hourglass has often been used like a symbol, and that image is still in use today.
Hourglasses held a fascination for pirates because of their association with coffins and death. So as to strike fear in into their helpless victims, pirates placed the hourglass on their flags.
Today who among us do not know the hourglass with its infinite loop on all computers. When the windows hourglass does not eventually disappear then, the program must be terminated only to try and begin again.
Size is not a deciding feature when it comes to the running time of an Hourglass. Although, if the running time must continue for several days, weeks or even months, then the Hourglass will have to be considerably larger.
Two such behemoths exist, and they are the Timewheel in Budapest (eight meters high) and the Japanese city of Nima, at the Sand Museum there is a sandglass which stands six meters high.
Both the aforementioned hourglasses have a running time of one year and are among the world’s largest chronometers. Erected in Red Square, Moscow, in July 2008, is an hourglass which stands 11.90 m in height and weighing 40 tonnes, this is unquestionably the largest sandglass in the world.
Still in use today, but most often only as an ornament or when one desires a comparatively approximate measurement of time, as in egg timers for cooking or when one is playing certain-board games.
When promoting dental health in children, an egg timer helps the child to see how long to brush the teeth.
For many folks collecting hourglasses has become a hobby, and some of those collectables are laudable, ornate, antique hourglasses valued at exceptionally high prices.
Some factors may affect the time that the hourglass measures, but hourglasses are accurate to within three seconds.
These elements include the width of the conduit, the position of the globes, the nature and quality of sand and also the amount of sand. Two alternatives to sand may be powdered eggs, and powdered marble.
The Hourglass has many other names and is commonly known as a sand timer, a sand clock or an egg timer and is a device used to calculate time.
This device consists of two glass globes placed one above the other and conjoined by a slender duct. Fine sand fills one of the globes and flows smoothly through the slender tube into the globe beneath at a calculated rate.
When all of the sand has, emptied into the bottom globe the device may be inverted to re-set the extent of time. The Hourglass is aptly named for the time most used for normal-running time ‘which is one hour’.
Ferdinand Magellan began his circumnavigation of the world in 1517, and he kept 18 hourglasses in each of his ships. A ship’s page turned the hourglasses and noted the hour for the captain to enter the information in the ship’s log.
The reference period for navigation on ships was noon. This was the hour when the sun was directly overhead, and this time did not depend on the hourglass.
Sometimes a structure contained more than one hourglass, and each hourglass contained a different amount of sand to run for an established amount of time. As an example the first hourglass timed 15 minutes, the next 30 minutes, then 45 minutes and 1 hour respectively.
No one knows when hourglasses or then called sand-glasses were first invented, but during the first half of the 14th century sand-glasses were regularly employed in Italy as a form of timekeeping and their popularity quickly spread to other parts of Western Europe.
Hourglasses were the first instruments used where one could depend on the time. Navigators used them on ships, and they were used in church, in industry and also when cooking food.