As a thank you for the inspiration of the Rainbow catch, I'd like to share the design for the modified version of the Rainbow catch that I used in my LARP ready Arquebus.
The first picture is of the 3D printed components (SLS printed in nylon) components and the two catches (one for the piston, the other smaller one is a safety catch for the ramrod) which are laser cut.
The catch body is on the far left. (and yes that is an SLS printed piston!)
The next picture is a rendering of the catch body itself. The actual catch slides inside the catch body. The catch spring, rather than being on the pin, is hidden inside a hole drilled inside the catch itself. This allows the spring to be contained inside the pseudo barrel of the arquebus, and allows for a slightly smoother operation and less chance of trying to work its way into the barrel through the hole drilled for the pin.
Although its not visible in the photo, the catch itself is machined to have a countersunk chamfer on it.
The little indentation at the bottom of the catch body, is for a metal lug to be screwed into it, this allows the barrel to be fixed into the stock, and is not that different to the same feature seen on barrel breech plugs seen on actual black powder guns.
Edit:
I've added a drawing of how the catch now looks.
The square recess takes the spring (5mm dia spring), while the T section is a nut capture for an M3 Nut, which saves having to drill and tap the catch.
I've also uploaded an STL of this catch, in case anyone want to have a play with it.
Attached Thumbnails
Attached Files
-
catch.stl 645.09KB
330 downloads
Edited by Justin Andrews, 29 November 2016 - 06:03 AM.
