Analog watch

An analog clock ( colloquially hand watch ) shows the time by means of hands on a dial to. In contrast, a digital clock displays the time with digits (digits) on a display. The term analog is a retronym.

Components

The Movement is an assembly of a mechanical clock and consists of the parts center wheel, cannon pinion ( this carries the minute hand ), minute wheel and hour wheel ( this carries the hour hand ).

The pointer mechanism transmits the drive of the Minutenradwelle. The minute, the minute wheel and the hours conduit containing AC drive translate the respective pointer speed. The rotational speed of the minute is reduced by a change gear and a change drive for hours tube that rotates only with 1/12 revolution per hour. Between the quarter pipe and the hour is a total gear ratio of 1:12 or 1:24, depending on a 12 - hour or 24 -hour scale. The hour hand is mounted on the hour tube and the minute hand on the quarter pipe. The fourth tube is connected via a slip clutch with the Minutenradwelle or the minute tube. The slip clutch allows you to set the time by pulling the crown.

The clock hands are moved by a movement that draws its energy from a reared spiral spring or a battery. The coming of the spring is done either by hand or by the movement of the clock with automatic winding. Analog clocks can next to the time display other data, such as day, date, year, or moon phases (see complication and Grande Complication ).

Pointer

The shapes and designs of watches pointers are varied, with varying finissage. Since the renaissance of the mechanical clock after the quartz crisis, new variants have been developed by pointers.

The pointer position can be mathematically calculated here for a 12-hour scale:

• Angle minute hand = number of minutes * 6 °
• Angle hour hand = number of hours * 30 ° minutes Number * 0.5 ° (at regular 12-hour analog display )

Determining the direction

With the help of an analogue clock and the direction of the sun, the direction can be determined. The sun is in the northern hemisphere at noon in the South. If one aligns on a wristwatch with 12 - hour scale the hour hand to the sun, south is on the bisector between the 12 - clock - marker and the hour hand. In the summer, the south lies on the bisector between the 1- clock - marker and the hour hand.