One clock I've looked at and debated purchasing for years is the Sattler Mechanica M1 clock kit. One aspect of that movement that has puzzled me is how the crutch pushing on the beat adjuster on the left side of the pendulum could provide an impulse for both directions of swing. I've attached an image from their manual that shows the arrangement.
With the pendulum swinging to the right, I can see how it provides an impulse. However, when swinging to the left, it seems like there is nothing to prevent the crutch from just jumping off the beat adjuster when the pallet receives its impulse. I feel like I'm clearly missing something, but not sure what.
The only really good video I've seen of this clock in operation is this one. Unfortunately, while he's peaking around under the movement, he doesn't quite show the action of the crutch pin.
So, what am I missing?
Cheers,
Dan

With the pendulum swinging to the right, I can see how it provides an impulse. However, when swinging to the left, it seems like there is nothing to prevent the crutch from just jumping off the beat adjuster when the pallet receives its impulse. I feel like I'm clearly missing something, but not sure what.
The only really good video I've seen of this clock in operation is this one. Unfortunately, while he's peaking around under the movement, he doesn't quite show the action of the crutch pin.
So, what am I missing?
Cheers,
Dan