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    notch lock trigger mechanism

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    banuvatt
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    Post by banuvatt on Thu Aug 22, 2019 10:12 am

    notch lock trigger mechanism Plannotch
    I wanted to make the crossbow the shape of a rifle so I was going to instead of a tickler make a trigger. So would just getting rid of the long lever and replacing it with a trigger work? Any plans, ideas or suggestions are welcomed and would be very much appreciated.
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    Post by septua on Thu Aug 22, 2019 11:56 am

    A clap lock style with a sloped notch to bear the string tension will allow a conventional finger trigger pull and retain your desired stock profile. The clapper will insure against dangerous misfires. My trigger lock of that type is case enclosed and waiting for installation.
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    Post by banuvatt on Thu Aug 22, 2019 12:33 pm

    I don't think I have the tools to make it. If making a notch lock mechanism with a trigger instead of a tickler is not a viable option then I will probably make a roller nut instead. The clap lock seems kind of complicated to make.
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    Post by septua on Thu Aug 22, 2019 6:39 pm

    Slobows (lives 8 miles from me) offers a claplock set, but uses a lever type trigger. You are correct about this style being tricky, for one thing the slope of the notch has to be snuck up on slowly by testing.
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    Post by c sitas on Wed Aug 28, 2019 8:08 pm

    Just shot in the dark here guys. ALWAYS, sneak up on a new trigger setup. You'll have your fingers much longer. The heavier the weight the more careful to be , before you trust it.It's just like a gun , you only make one mistake.
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    notch lock trigger mechanism Empty Re: notch lock trigger mechanism

    Post by Gnome on Sat Sep 07, 2019 11:24 am

    banuvatt wrote:I don't think I have the tools to make it. If making a notch lock mechanism with a trigger instead of a tickler is not a viable option then I will probably make a roller nut instead. The clap lock seems kind of complicated to make.
    Hey Banuvatt, The first crossbow I built had a rifle-like profile and rolling nut with a trigger type release... and it didn't work well at all! Turns out there's a reason for the long lever of a tickler. All the energy of the drawn bow is bound up in the lock mechanism, whether it's a notch or a nut, and releasing it can be a chore without some decent mechanical advantage. I've since rebuilt that mechanism to satisfaction, and copied the design a few more times, so now I have a trigger-like release design that works with a roller nut... but simple it ain't. There's a toggle lever between the trigger lever and the sear surface of the nut, essentially breaking the long lever of a tickler into two smaller levers, both with advantage, that imparts a smooth but quite long trigger pull.
    By far the best non-modern trigger-type release design is the Han Dynasty Chinese mechanism, it has a short, crisp, reliable pull. Unfortunately it is also slightly complicated. In short, I doubt there is a good design choice that is both trigger and simple. If I were in your shoes, I'd just modify a tickler design to fit well with the shape of a rifle stock like tiller. I know that can work, because I've gone that route, too.
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    Post by banuvatt on Sat Sep 07, 2019 12:55 pm

    Ah thank you, I think I have seen your post on that trigger mechanism you were talking about. I really loved it, the two piece trigger mechanism seems to have a smoother release then having just a nut and a one piece trigger.

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