The detent mechanism for Clock 4 uses a gate invented by Philip Woodward (I think). The detent sits on a pivot near the pin escape wheel.
The detent is fairly long, but just press fit into the frame.
The detent is cut from a small piece of white oak.
Here is the detent after shaping.
There are many issues with the detent, and it doesn't run at the moment:
- The gate is very thin. I broke two detents already
- Woodward didn't seem to bank his detent, but it looks like I need to since wood has more flexibility than metal
- The catch for holding the pin is very touchy as to how deep it is. Woodward suggests that it might work as just a small depression, but this caused the pins to jump out. Too deep, and they can't clear when the escape wheel recoiled... in which case the pins stick.
- The pins of the escape wheel are too inaccurate in their placement
- The pins of the escape wheel are too inaccurate in their vertical alignment
- The pins of the escape wheel are not all the same diameter (because some of them split in the process of being installed).
- The relative positioning of the catch and the gate slot is quite delicate, and there isn't much clearance.
- The counterweight portion of the detent governs how much weight is needed to run the escapement. This needs to be very light.