In this book alternative schematic diagrams for the time measuring devices along with their manufacturing and part design and technology have been developed. This objective has always been a challenge to specialists and those who have developed clock mechanisms to the described level. Despite of what has been achieved, available devices should also be revised and improved to fully meet the requirement of usage in modern society. These are higher accuracy requirements, production efficiency, durability, reliability, appearance, safety and environment considerations. Presented here are possible alternative schematics of such time measuring devices.