From the book description:
All of the precise and delicate gears and levers in a clock can appear dizzying to the amateur, but this guide, with its wonderfully detailed diagrams, can clear things up. It covers the theory behind clock movement and design, including the particulars of escapements, pendulums, balance wheels, and even the sheet music for popular chimes. The American striking clock, the 400-day clock, and the alarm clock receive special attention. The in-depth information, including explanations of clock repairing terminology and details on the tools, materials, and supplies that are needed for success, will benefit even skilled enthusiasts.
Here's where you can search inside of or order a copy of the book Clock Repairing as a Hobby: An Illustrated How-To Guide for the Beginner