1. How Things Work:Mechanical Alarm Clocks Ed (Jessica) Edwards Dec. 12, 2003

2. General Evolution Under the Hood The Main Attraction A Closer Look Powering Up Gearing Up Sound the Alarm Not so Complicated Acknowledgments Mechanical Alarm Clocks

3. General Evolution(of mechanical clocks) • Sundials/ shadow clocks (2100 BC) • Water Clocks (1500 BC) • Pendulum Clocks (1300s AD) • Spring-driven Clocks (1400s) • More Accurate Pendulum and Spring Clocks Developed...

4. Under the Hood • Remove winding knobs and back cover...

5. The Main Attraction • After removing stand, alarm bells, and mounting ring... Main spring and Gear train Alarm spring Alarm escapement Alarm gear train Oscillating wheel and spring

6. A Closer Look (Goofy looking guy from clipart) Still in the box.. (Curious George)

7. Gearing Up Gear train

8. Acknowledgments • I’d like to thank Jennifer Bachman for donating the alarm clock used, and Dr. Szapiro for helping me with my project. • Bibliography • Bloomfield, Louis A., How Things Work, p.232-238 • Brain, Marshall, Inside a Wind-up Alarm Clock • Http://www.home.howstuffworks.com/inside-clock.hm • Woodenstone Clocks, A History of Clocks • Http://www.woodenstone.com/history.htm