The Evolution Of Tower Clock Movements And Their Design Over The Past 1000 Years - Horology

The Evolution Of Tower Clock Movements And Their Design Over The Past 1000 Years Mark Frank Copyright 2013 The Evolution Of Tower Clock Movements And Their Design Over The Past 1000 Years TABLE OF CONTENTS Introduction and General Overview Pre-History ............................................................................................... 10th through 11th Centuries ........................................................................ 12th through 15th Centuries ........................................................................ 16th through 17th Centuries ........................................................................ The catastrophic accident of Big Ben ........................................................ 18th through 19th Centuries ........................................................................ 20th Century .............................................................................................. 1. 2. 4. 5. 6. 7. 9. Tower Clock Frame Styles ................................................................................... Doorframe and Field Gate ......................................................................... Birdcage, End-To-End .............................................................................. Birdcage, Side-By-Side ............................................................................. Strap, Posted ............................................................................................ Chair Frame .............................................................................................. Plate-and-Spacer, Strap ............................................................................. Plate-and-Spacer, Integral Plate ................................................................ Flat Bed .................................................................................................... Flat Bed, Common Hybrids ....................................................................... Other ........................................................................................................ Modular .................................................................................................... 11. 11. 12. 12. 13. 13. 14. 14. 15. 16. 17. 17. Common Escapements Found in Tower Clocks Verge, Foliot using Crown Wheel ............................................................. Strob, Foliot using Pinned Wheel .............................................................. Verge with Long Pendulum and Short Pendulum ...................................... Recoil, Anchor .......................................................................................... Deadbeat, Graham .................................................................................... Deadbeat, Pinwheel ................................................................................... Gravity, Dennison Double Three Legged ................................................... ‘Free’ Pendulum ....................................................................................... 18. 19. 19. 20. 20. 21. 21. 22. Types of Remontoire Used in Tower Clocks Overview and General Function ................................................................ Escapement, Spring style .......................................................................... Gravity Train Remontoire Wagner, Swinging Frame .............................................................. Differential .................................................................................... Epicyclical ..................................................................................... Robin, Endless Chain ..................................................................... Verite, Rocker ............................................................................... G