Post Description

Accurate Clock Pendulums

BINSEARCH GEEFT SOMS EEN REQUIRES PASSWORD PROTECT, DIT IS NIET JUIST !!

The Shortt clock, made in the 1920's is the most famous accurate clock pendulum ever known, having an accuracy of one second per year when kept 
at nearly constant temperature. Almost all of a pendulum clock's accuracy resides in its pendulum. Of the pendulum is accurate, 
the clock will be accurate. In this book, the author describes many scientific aspects of pendulum design and operation in simple terms 
with experimental data, and little mathematics. It has been written, looking at all the different parts and aspects of the pendulum in great detail, 
chapter by chapter, reflecting the degree of attention necessary for making a pendulum run accurately. The topics covered include the dimensional 
stability of different pendulum materials, good and poor suspension spring designs, the design of mechanical joints and clamps, effect of quartz 
on accuracy, temperature compensation, air drag of different bob shapes and making s sinusoidal electromagnetic drive. Once whole chapter is devoted 
to simple ways of improving the accuracy of ordinary low-cost pendulum clocks, which have a different construction to the more expensive designs of 
substantially well-made ones. This book will prove invaluable to anyone who wants to know how to make a more accurate pendulum or pendulum clock.