Clocks - (1 product found)


A clock is an instrument which is used to indicate, keep and coordinate time. It is one of the oldest human inventions. The time keeping element in every clock is a harmonic oscillator which is a physical object that vibrates repetitively at a precise constant frequency. This oscillator can be a pendulum, a tuning fork, a quartz crystal or the vibration of electrons in atoms as they emit microwaves. Clocks and watches can be divided into two broad categories – analog and digital. These categories are divided based on the way time is displayed.

Analog: Analog clocks are available in all shapes and sizes and they indicate time using arrows or hands usually 3 hands/arrows. These clocks have a fixed dial which has calibrations into sixty markings along their conferences, indicating 12 hours. The 12 hours are further calibrated into 60 markings, each indicating a minute. The three hands or arrows rotate across the dial to indicate the passing hours and minutes.

Digital: Digital clocks employ LCD (liquid crystal display), LED (light emitting diodes) or VFD (variable frequency drive) to display time. These clocks indicate times in hours, minutes and seconds. They can display either a 12-hour format or the 24-hour format. Some digital clocks even indicate the date and day of the week also. Digital clocks can be powered by a quartz crystal or AC power.

Earliest Clock Types

Sundials: These can be considered to be the first clocks. They are primitive time-telling devices and they indicate the position of the sun in the sky. This device uses a shadow-casting object which could be a thin rod, to determine the position of the sun at the particular time of the day. It indicates the time by casting a shadow on a flat surface with markings that usually correspond to the hours of the day however, it cannot measure time after sunset or on cloudy days. Sundials can either be horizontal or vertical.

Water clocks: These time measuring instruments came after the existence of the sundial. With this instrument, time is measured by the regulated flow of liquid from one vessel into another and the amount is then measured. The modern water clock keeps time by a calibrated pendulum which is powered by a water stream piped in from the clock's reservoir.

Importance and Uses of Clocks

• The clock can be seen as one of the most important devices of all civilization
• Clocks make it easier to organize events and coordinate activities.
• They can be used as decorating pieces as they can add more meaning and character to the overall décor of your living or working space.

Where to Buy Clocks Online

Jumia offers a variety clocks in different shapes, colours and materials. You can buy these at affordable prices when you shop with us. You can also get all your household and office needs here at unbeatable prices. Shop at your convenience and from the comfort of your home. Your items will be delivered right to your doorstep. Shop now and pay cash on delivery.