posted by hot news on Apr 30
Time piece inventors throughout recorded history have had one common objective.They have all tried to accurately measure time so that people could use it better. They have constructed a number of time measurement mechanisms.. Among them are sundials, stone structures like Stonehenge, pocket watches, and various clocks.
The star sirius appears near the sun every 365 days. The ancient Egyptians developed a calendar knowing this in the year 4236 BC. Old clocks, many made of sticks, were based on this calendar and lunar and tidal acitivity and were operated manually by moving the stick to align with the sun. Other indicators to help gauge the annual time included the flooding of the nile river.
During their brief popularity sundials told time based on the rotation of the Earth, but cloudy days and periods of darkness made them useless. Many primitive timepieces relied on the shifting of the sun to tell time and had to be modified seasonally to be better understood.
Alarm Clocks With One Setting
The first mechanical alarm clock was developed in 1787 in New Hampshire but had one major glitch. The bell on the alarm could only go off at four in the morning. It was not until 1876 that old clocks with an adjustable alarm were developed. The patent was held by Seth Thomas and is the basic for many mechanical alarms used today.
Prior to 1912 all clocks were operated either by winding the main spring or the mechanical action of a pendulum. In this year the Warren Clock Company introduced old clocks that were operated by battery. As pocket watches became prevalent in the early 17th century, a French mathematician tied a strong to it and wore it around his wrist, becoming the first person to wear a wrist watch, the most common timepiece now in use.
Lots of old clocks used weight mechanisms to operate. This meant that the clocks tended to be quite large and not very portable. Grandfather clocks are a good example. Even relative smaller mantel clocks were quite bulky. Innovation in the methods of clock construction have evolved over the years. The one thing which has not changed is man’s fascination with time.