2024 Author: Priscilla Miln | [email protected]. Last modified: 2023-12-16 00:21
The first sundial appeared in ancient Rome. But they were not distinguished by high accuracy, like hourglasses, fire and candle clocks. The invention of more accurate water clocks can also be attributed to this period. The real revolution was the appearance of mechanical models in the 13th century.
History of mechanical watches
Mechanical instruments were very heavy and bulky. They required constant supervision. The clock has been constantly improved. They began to be installed on city towers. Some models of ancient watchmakers are real works of art. They indicated not only time, but also the movement of the sun, moon and planets. The movement with dial and hour hand was only developed in the 16th century.
Watches
The first wristwatch was invented in the early 19th century. But they are not widely used. Even at the beginning of the last century, pocket watch models were more popular. During the First World War, wristwatches began to be used by the military. In the 1930s, wristwatches are still a luxury item. Onlyafter the 70s they became an everyday item. After all, cheap quartz movements were developed at that time.
In the 21st century, smart watches with many functions are invented. Such models can even replace telephones. Currently, mechanical wristwatches are used as decoration and an indicator of social status. A modern wrist watch is a useful device with many additional options. Manufacturers equip their watch models with tachometers, thermometers, voltmeters and other functions. They help the owners in many daily activities. Watches with a tachometer and a voltmeter are especially popular among motorists.
Tachymeter
One of the most popular features is the tachometer on the watch. It is used by motorists, travelers and athletes. This option is usually equipped with chronometers. This is a very precise watch certified in Switzerland. They are much more expensive than regular models. They should not be confused with chronographs. This is the name of a clock with a stopwatch. In such models, the clock mechanism and the stopwatch work independently of each other. Modern chronographs allow you to measure the time of two simultaneous processes. The military and doctors use them in their work.
Every student knows that thanks to formulas that are related to time and distance, you can calculate the speed of an object. If you mark the time on the chronometer, knowing which path the object under study has overcome during this time period, then by dividing the distance by time, you can get its speed. Modern models allow you to do without additional calculations andget the desired result quickly. They are given an additional scale. A fixed tachymeter marking is located on the watch bezel. First you need to start the tachometer on the watch or start measuring when the second hand is at the starting mark. After overcoming the base segment, the tachometer is stopped (the position of the arrow is fixed). The arrow will indicate the speed in base segments per hour. A conventional tachometer on the watch allows you to measure speed up to 60 km / h.
Some manufacturers put more complex scales on their models. Now, when passing kilometer posts along the road, you can use the tachometer on your watch. By pressing the button on the first and finishing the measurements on the second pillar, you can estimate how long it will take to travel.
How to use the tachometer on your watch
The principle of the tachymeter is very simple. Speed is distance divided by time. The scale calculates a function of 3600 / time in seconds. With the help of a tachometer, you can measure labor productivity. To do this, determine the time of manufacture of a unit of production. The arrow on the device will indicate the number of parts released per hour. Other devices work on the same principle. The telemetry scale is designed to determine the distance to an object using sound. To do this, measure the time between a flash of light and sound (lightning and thunder). If you have any difficulties with the calculations, you should refer to the manufacturer's instructions.
Other options
Modern watch models are equipped not only with the current time indicator, alarm clock andcalendar. A repeater is a combat mechanism in wrist models that informs the owner what time it is. The most expensive models are equipped with a minute repeater.
Flyback - a chronograph function that allows you to start and stop the stopwatch, reset the time with one button. In conventional models, two buttons are used for this, located opposite each other. The countdown counter is used in yacht chronographs.
World time indicator - an additional rotary dial on a wrist watch. It was invented in the 30s of the last century. Typically, such models are equipped with an additional dial to determine the time in a different time zone.
Reserve indicator - a device that indicates the remaining time of the mechanical watch models. A dynamometer is an indicator of watch accuracy. Indicates the amount of time the instrument can be trusted.
Recommended:
Wife does not want to work - what to do? How to persuade your wife to work: advice from a psychologist
Every second man faces a problem when his wife does not want to work. What to do in such a situation, to force the missus not to be lazy and find her place in life, or to let her stay at home and raise children? The solution to the problem is quite obvious when the family does not have enough money. But when a man earns well, the question can hang open for many years. Find the answer below
When does a baby start holding its head on its own?
All parents are concerned about the proper development of their child. Therefore, many questions often arise, especially if the child is the first in the family, knowledge and experience, of course, are not enough. The first year of a baby's life is the most active in its development. During this period, he learns basic skills to control his own body. Let's take a closer look, for example, at what age does a child begin to hold his head?
Why does a dog shake its head and scratch its ears?
Many animal lovers cannot imagine their life without a pet. Someone loves parrots, someone loves cats, some even love spiders and snakes. Most often, however, dogs are bred. This is due to the fact that these animals are considered human friends, have a good character, protect their owners and bring a lot of joy to adults and children
Skimmer for the pool and the principle of its operation
Skimmer is an element of water treatment and water intake in the pool. Recently, skimmer artificial reservoirs have gained great popularity. This is due to the fact that their construction is much cheaper than traditional ones
When to talk about pregnancy at work? When should I bring my pregnancy certificate to work? What does the Labor Code provide for pregnant women
Despite the fact that pregnancy is a purely personal matter for a woman, it worries not only her, but also the employer. After all, an employee in a position means frequent requests, sick leave and, of course, in the end - maternity leave. About when to talk about pregnancy at work and how to do it right, we will tell in the article below
