Is the winding of the old clock a little slippery?

This is because the winding mechanism gear of the movement is worn or displaced, or the winding-to-reversing mechanism is worn or displaced.

develop

1. primitive times

Before the invention of clocks in the real sense, people would record time in various primitive ways.

People who don't know much about watches may think that watches only record hours and seconds. But some watches can also record the year, month and day. Before the invention of watches, people in different regions recorded hours, minutes, seconds, months, days and years in different ways.

For example, the solar terms in China and the Mayan calendar of Maya recorded time in days to guide agriculture and life. The first day is defined as the cycle of the sun, such as the sun rising again.

The sundial (bottom left) can be used as a tool to indicate time.

But what really makes people more meaningful seems to be the timing function. People need to know how long it takes them to do something from the beginning to the end. Then an hourglass (bottom right) appeared. There are also many barrels with holes to hold water (missing, as shown below), and the size of each hole is different, so we can judge how long it has passed by the amount of water flowing out. 2. The era of mechanical watches

15 1 1 year (also known as 1505), German Peter Haehnlein made the first clock (below), and since then, clocks and watches have developed into the era of mechanical watches.