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Forum topic by BubingaBill posted 10-17-2013 07:43 PM 565 views 0 times favorited 10 replies Add to Favorites Watch
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BubingaBill

247 posts in 369 days


10-17-2013 07:43 PM

Topic tags/keywords: question

As some of you know I am designing a pool cue case for all intensive purposes is round. I want to make something unique to open the end and I thought of an Iris. Any thoughts on this? I’m worried it might be too delicate and break. The case is only going to be about 4” OD so I don’t have allot of room to mess with. I have searched the web and it appears that the more “fins” used will make the control rings smaller. I am not accustomed to working with metal but I do have 2 metal cutting band saw blades. I could get a nice polished brass plate from the big box store cheap and cut it from that. It’s alot of moving parts!
Has anyone tried something like this?

-- Measure twice and try not to cut your thumbs off!


10 replies so far

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REO

626 posts in 759 days


#1 posted 10-17-2013 11:33 PM

You have a unique idea there I saw the post of the mech you started with in the other thread. Your first design does not appear to be able to operate I could be missing something though. As it appears you have been thinking a sort of iris mechanism with the shutter pieces modified may work but there are lots of small parts and it could be somewhat fragile. Have you thought of making it with the arms hinged in the lateral direction? you would only have to pin each for the hinge and use a center operator for like a push button for all the arms at once. use a spring under a disk to hold them in the latched position.

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BubingaBill

247 posts in 369 days


#2 posted 10-18-2013 02:05 AM

I like the way you think but I am having trouble seeing it. Any chance of a sketch??

-- Measure twice and try not to cut your thumbs off!

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BubingaBill

247 posts in 369 days


#3 posted 10-18-2013 01:55 PM

Reo,
I made a very large test of my mechanism and you were right. It didn’t work… So I modified it by adding slots in one of the links and now it works. But I don’t like it. I need to come up with something else.
I have been reading your post (a few times) trying to envision your idea but I’m just getting a headache trying to understand the center pin part.

I could go simple and just attach 2 or more “tabs” to a center rotating knob to make my locking mechanism but that seems to simple. UNLESS I think like a bicycle hub!! I could get spokes from the local bike shop and fill the “lid with 20 or more spokes! The spokes are already bent 90 degrees for the hub and I could cut them down to fit!

I could make a simple slot and pin to allow the center knob to rotate only the amount I want.

I was at the hardware store yesterday and saw a Desk drawer lock and thought that maybe I could use that instead of a knob. This addition would make it lockable!
Any thoughts on my ramblings??

-- Measure twice and try not to cut your thumbs off!

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BTimmons

2139 posts in 1170 days


#4 posted 10-18-2013 03:46 PM

It sounds like a fun project, but if it’s something you’re hoping to sell, I think you might be making things more complicated than they need to be. I have a bad habit of doing that myself. But if you’re still keen on doing it, perhaps here would be a good place to start. It’s worth noting that the really nice looking ones seem to be either laser cut or 3D printed. A metal cutting band saw won’t allow you that kind of precision.

And I hope you’ll pardon me if this seems pedantic, but the phrase, “for all intensive purposes” makes no sense. It’s supposed to be “for all intents and purposes”.

-- Brian Timmons - http://www.BigTWoodworks.com

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BubingaBill

247 posts in 369 days


#5 posted 10-18-2013 04:55 PM

Hi Brian,
I guess my phrases are a bit off. That’s why I’m not a writer!!
I don’t have access to a laser cutter or 3D printer so I think I will give up on the Iris idea for now. I still think the bike spokes will work and be simple to make.
More complicated then it needs to be is something that runs in my family. Lately the steampunk machines I have seen on line have fascinated me. I love the hammer finished copper/brass and wood! I have no way of making metal gears and the process of making them from wood is extremely time consuming! I’m having a hard enough time making levers that work, I don’t want to try my hand at figuring out gears!
I am working up a sketch for the spoke idea and will post it here. I would love to get your feed back.
Thanks for the link!

-- Measure twice and try not to cut your thumbs off!

View Clint Searl's profile

Clint Searl

1473 posts in 1046 days


#6 posted 10-18-2013 05:02 PM

For all “intensive purposes” fuggettibattit.

-- Clint Searl....Ya can no more do what ya don't know how than ya can git back from where ya ain't been

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BubingaBill

247 posts in 369 days


#7 posted 10-18-2013 09:28 PM

Ok gang,
Here is what I have come up with. I know it is not to scale but I think it will show off the spokes nicely. The outer ring will be a few layers of wood with holes drilled for the spokes. The fancy black area will hold the lock in place and give you a view of the spokes as they move. I’m thinking of screwing on a backer plate to this so I can remove it to make changes or repairs. I will make a “hub” for the spokes that will fit the lock and turn with the key. I thought about the length of the spokes and decided I will install all of them and trim them in the unlocked position. The thickness of this end cap will give me the option to cut a small groove for an O ring. This will give the cap a snug fit and keep it from rattling.

-- Measure twice and try not to cut your thumbs off!

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REO

626 posts in 759 days


#8 posted 10-19-2013 01:43 PM

how do I get a PDF to post?

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BubingaBill

247 posts in 369 days


#9 posted 10-19-2013 01:55 PM

Good question. I have no clue

-- Measure twice and try not to cut your thumbs off!

View BTimmons's profile

BTimmons

2139 posts in 1170 days


#10 posted 10-19-2013 02:55 PM

REO, I’d say upload it to a file sharing site like Dropbox, then link to it here from the forum.

-- Brian Timmons - http://www.BigTWoodworks.com

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