CLOCK TOWER
E. Howard Clock Co. Boston MA
Three face tower clock

Paul Middents has reported that this clock is refered to
as a "four arbor" model and installed around 1910.
It may be the earliest known of this model and the only
multi dial use in a tower.

Video of this E. Howard
3 face tower clock
Video of tower clock

I came across an excellent video on
"The Four Parts of a Mechanical Pendulum Clock"
specifically an E. Howard Tower Clock
simular to the one I have and shown below
click here for video

I came across an excellent video on
"The Four Parts of a Mechanical Pendulum Clock"

click here for video

	The pendulum length dictates the rate at which the clock runs. A pendulum with a length of 39.1 inches has a 1 second period. To keep the pendulum swinging, a clutch rod gives the pendulum a kick on each swing. As oil thickens, dust collects, and friction changes, the power supplied to the pendulum can drop the swing angle from 4 degrees to 3 degrees resulting in an 11 second gain per day. Also changes in temperature can change the length of the pendulum and the timing of the swing resulting in gains of time in the winter and a loss of time in the summer. http://youtu.be/KhnTX2E8YFo