Slinging.org Forum - crossbow trigger

Dave M Descens Offline Slinging Rocks at seagulls Posts: 239 Littlehampton West Sussex Eng Gender:	crossbow trigger Jun 7^th, 2008 at 6:42am Can anybody help me not to reinvent the wheel I am looking foe a simple way to make a trigger mechanism for a crossbow
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Steven Interfector Viris Spurii Offline RaptorIsAsRaptorDoes Posts: 2101 Austin, Tx. Gender:	Re: crossbow trigger Reply #1 - Jun 7^th, 2008 at 3:34pm Try this URL http://blog.modernmechanix.com/2006/08/01/build-a-hunters-crossbow/ for home built crossbow
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Nakki Junior Member Offline We sling in Finland too Posts: 94 Finland, Espoo Gender:	Re: crossbow trigger Reply #2 - Jun 7^th, 2008 at 4:03pm I had a same problem but it got solved. Heres a one scetch of one sort of trigger mechanism. I have also the same mechanism that I've redesigned in my computer. Propably not the simplest but good still. My friends use one more simple mechanism. I'll try to draw it fast with paint
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Bikewer

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Re: crossbow trigger
Reply #3 - Jun 7^th, 2008 at 9:26pm

The illustrations used by Nakki represent the standard sort of mechanism for most medieval crossbows. The "nut" holds the bolt and string, and pivots around it's axis. the trigger (or "tickler" as the old guys said) holds it from doing so.

The trigger illustrated can be simplified considerably; the one I built is a simple section of 1/8" steel sheet metal cut into a dogleg shape and using a coil spring rather than the leaf spring illustrated.

The nut is historically made from ivory or antler sections; not too practical today. Most modern replicas use aluminum bar stock or Delrin plastic. Nylon is fine too. The slot for the trigger release must be reinforced with a piece of steel so that it doesn't wear.

Check out Alchem for parts, illustrations, and advice:

http://www.alcheminc.com/crossbow.html

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Thomas

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Re: crossbow trigger
Reply #4 - Jun 8^th, 2008 at 11:24am

The mechanism is shown in a descriptive way only. The socket for the revolving nut would extend slightly farther above and around the nut to prevent the nut from coming upward at all and jamming or worse popping out. Of course the hole shown in the nut center is for a cord binding which also helps with that same problem. Also the socket top is again, flush to the tiller (stock) top as shown.

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winkleried

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Re: crossbow trigger
Reply #5 - Jun 8^th, 2008 at 2:35pm

Yeah,
However the nut on my 14th century bow is made from some sort of wood. Seems to work well for me.

Agree with the advice to check out Alchem

Marc Adkins

Bikewer wrote on Jun 7^th, 2008 at 9:26pm:

The illustrations used by Nakki represent the standard sort of mechanism for most medieval crossbows. The "nut" holds the bolt and string, and pivots around it's axis. the trigger (or "tickler" as the old guys said) holds it from doing so.

The trigger illustrated can be simplified considerably; the one I built is a simple section of 1/8" steel sheet metal cut into a dogleg shape and using a coil spring rather than the leaf spring illustrated.

The nut is historically made from ivory or antler sections; not too practical today. Most modern replicas use aluminum bar stock or Delrin plastic. Nylon is fine too. The slot for the trigger release must be reinforced with a piece of steel so that it doesn't wear.

Check out Alchem for parts, illustrations, and advice:

http://www.alcheminc.com/crossbow.html

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winkleried

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Re: crossbow trigger
Reply #6 - Jun 8^th, 2008 at 2:39pm

Actually I found it to be pretty much spot on. It's looks identical to the mechinism that is used on my bow. only downside is I have to occasionally have to manualy reset the nut before I cock it.

Marc Adkins

Thomas wrote on Jun 8^th, 2008 at 11:24am:

The mechanism is shown in a descriptive way only. The socket for the revolving nut would extend slightly farther above and around the nut to prevent the nut from coming upward at all and jamming or worse popping out. Of course the hole shown in the nut center is for a cord binding which also helps with that same problem. Also the socket top is again, flush to the tiller (stock) top as shown.

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Dave M Descens Offline Slinging Rocks at seagulls Posts: 239 Littlehampton West Sussex Eng Gender:	Re: crossbow trigger Reply #7 - Jun 10^th, 2008 at 4:36pm Thanks for all the information folks there is enough here to keep me occupied over the winter ,after I have managed to get into my shed and cleaned it up so I can work in it as it's a bit of a mess Thank you all once again
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