An Ellicott pendulum is a temperature compensated clock pendulum. The metal rod of a pendulum changes its length with temperature. The consequence is, that a colder pendulum swings faster (the rod is shorter) and a warm pendulum swings slower (longer rod). The Ellicott pendulum compensates this temperature error of the pendulum. It consists of a steele rod and two brass rods, wich are connectet in one point above the pendulum bob. Brass has a higher temperature coefficient than steele. On the free end of the three rods, a special lever mechanism, controlled by the lenght difference of the rods, lifts the pendulum bob up, when the length of the rods grows. The bob stays at its position and the period of the pendulum is without temperature influence.
See also http://commons.wikimedia.org/wiki/File:Ellicott_pendulum.png
The Pendulum.
You could use a stopwatch.
t = 2*pi*sqrt(L/g) where L is the length of the pendulum and g is the force of gravity.
The longer a pendulum is, the more time it takes a pendulum takes to complete a period of time. If a clock is regulated by a pendulum and it runs fast, you can make it run slower by making the pendulum longer. Likewise, if the clock runs slow, you can make your clock run faster by making the pendulum shorter. (What a pendulum actually does is measure the ratio between time and gravity at a particular location, but that is beyond the scope of this answer.)
wind resistance cannot be ignored in considering a simple pendulum. The wind resistance will be proportional to a higher power of the velocity of the pendulum. A small arc of the pendulum will lessen this effect. You could demonstrate this effect for yourself. A piece of paper attached to the pendulum will add to the wind resistance, and you can measure the period both with and without the paper.
John Ellicott has written: 'A description of two methods by which the irregularities in the motion of a clock' 'An account of the influence which two pendulum clocks were observed to have upon each other' -- subject(s): Pendulum
The Pendulum.
Dorothy Ellicott died in 1990.
Dorothy Ellicott was born in 1901.
Rosalind Ellicott was born in 1857.
Ellicott's Stone was created in 1799.
Benjamin Ellicott died in 1827.
Benjamin Ellicott was born in 1765.
A pendulum measures time by swinging back and forth in a regular, predictable motion thanks to gravity. The time it takes for the pendulum to complete one full swing, known as a period, remains constant for a given length of pendulum. By counting the number of swings over a set period, such as a minute, a pendulum can be used to measure time accurately.
Andrew Ellicott was a man that helped one of the presidents
The web address of the Ellicott City B And O Railroad Station is: http://www.borail.org/Ellicott-City-Statio
Andrew Ellicott was born on January 24, 1754.