Rack-and-Snail Strike In this video Trevor Murphy shows a functioning rack-and-snail strike on a beautiful E. Howard and Co. tower clock. This tower clock Howard and co. tower clock movement uses 350 lbs. of weight to run the strike train! Learn about the self correcting benefits of the rack-snail over the count-wheel-strike. For a great explanation of rack-and-pinion design theory and how to repair a clock with a rack-snail mechanism check out Mark Headrick’s article covering the rack-and-snail strike at his website Abbey Clock hereRack-and-Snail Mark covers rack-snail strike in depth at his site. If you liked this video please give [More]
Count wheel strike Animation showing how the count wheel strike works. This robust and highly dependable strike has found it’s place in horological history. Although not a self correcting strike it’s found in many popular clocks throughout the world.
Count Wheel Striking Video of count wheel striking hour and half hour in a French clock movement. This proven time and strike mechanism can be found in many antique French movements.
Animation of strip pallet recoil escapement. A very inexpensive but effective pallet shaped by bending a strip of steel into the shape shown in the video produced a strong running and dependable recoil escapement. The strip pallet recoil escapement was commonly seen on the most popular affordable clocks. Proving itself a dependable, tough and worthy addition to horology in addition to ease of manufacturing the strip pallet found it’s way into the American clock market making it the most common household escapement ever produced.
Another well thought out animation by Ken Kuo of a verge crown wheel escapement with foloit.
Nice video of homemade clock. Good demo of verge with foliot.
Good video of verge escapement in clock circa 1780.
Close up action of a verge escapement in an Austrian Clock Movement. Video by Bill Stoddard.
Another helpful animation by Ken Kuo showing the six-legged gravity escapement. Note that impulse occurs once every two pendulum beats.
Same as the four-legged gravity escapement with square block impulse but with impulse pins.
Nice animation of a four legged gravity escapement using square block impulse.
Good close up of Seth Thomas 86 with dead beat escapement.
Clear demo of grasshopper escapement using open model.
Nice animation of John Harrison’s Grasshopper Escapement