Where can I get plans for this simple height-adjustable sitting stool?

John - I saw this in a photo. It's simple; I think the plans might be pretty old.

You're a pretty resourceful guy, you can pull it off. Post some project photos, if you don't mind.

yep - you don't need no plans, just dive into it.
(but, I meant photos of the stool, when you start).
I know your talents are above reproach !!!!

Thank you, John! I didn't do the chairs.

John Smith_inFL said:

I can't see where the total height adjustment would be that noticible. But, if you only needed a couple of inches,

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Based on "standard" sitting height and using a 1.5 inch adjustment between the notches, The resulting heights could be expected. (numbers have been rounded off)
21.4 tallest
20.0
18.0 = center position
15.2
11.0 lowest

I'll see if I can figure out a design and make a drawing; will post it here then see if I can fabricate it.

Thinking about using a small metal gear rack (see link below) embedded into or on the bottom of the top cross members with a metal rod affixed between the top of the crossed upright legs to fit into the teeth of the gear rack. In this way, trying to get finer height adjustment capability in the stool. https://www.grainger.com/product/36...VRYRMCh3T-Q_HEAQYBCABEgJwgPD_BwE&gclsrc=aw.ds
All thoughts and comments are welcome!

cassidy said:

The stool is not so easy.

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Compared to what you have already beautifully done the stool is easy.

cassidy said:

Thinking about using a small metal gear rack

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I would only do that if you really don't mind having metal show on the stool. I think the adjustment increments of the stool in the photo will already be fine. I would choose a tough wood for the teeth, and make them wide, say 2 inches or so on each side.

What is the highest and lowest you want the stool to be, with about how many positions in between? The greatest stress on the teeth etc will be at the low setting.

Bob, I'm thinking 18" stool height plus and minus 2" and adjustable in 1/2" increments would be suitable for adjusting stool seat height. I plan on using either white or red oak, possibly eastern hard maple. Have to figure out notch intervals (inches) in the two wood cross members to accomplish that; I think a little bit of right triangle trigonometry for each of the 9 heights (16", 16.5", 17", 17.5", 18", 18.5", 19", 19.5" and 20"; a squared + b squared = c squared for the 3 sides of the triangle if the diagonal leg length is held constant, say 24" for now) might work as a starting point to figure notch intervals (inches) though the number of notches (9) may need to be reduced to 5 to 7 given the limited cross member length which is as yet undetermined. There are certainly other ways to do this but maybe not as fun. All comments are welcome.