Gallery, Projects and General > Neat Stuff

Bit Quiet on Here

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Bluechip:
Chris

This is more like a 'traditional' build.

Fairly easy.

http://physics.kenyon.edu/EarlyApparatus/Oscillations_and_Waves/Harmonographs/Harmonographs.html

In about 1974, I did some bits for a Teacher who lurked in the local pub. He did the wood bits, I made some of the metalwork, gimbals etc.
Worked fine. If you want any more info. just ask ..

Dave BC

raynerd:
Ahh I see, this link helped: http://www.fxmtech.com/harmonog.html

So harmonographs and pintographs are both drawing machines, your inital video was a pintograph - two rotating disks, the harmonographs are the pendulum type machines.

I`m going to look into this in more detail. I bet the kids would love this and it would get some good use at science club.

Bluechip:
Chris

I knew you'd find a site ....  :D I had every confidence in you  :D

This is from your link

http://www.karlsims.com/harmonograph/

We made one end 'swingable' in both directions, ie, a 'sperical' bearing, so you can do it with 2 pendulums.
Weights were 2 litre plastic bottles filled with wet soft builders sand, circa 4-5kg, the pen arm hinge was one of the 'polypropylene?' aileron hinges used on model aircraft.

Try an adapter to put more then one pen on, in different colours. Cute patterns.
I seem to remember spending a somewhat sozzled Saturday afternoon in Steve's garage, playing with the thing when it was up and running.

I never really grew up   :lol:

Fortunately ..

Dave BC

old-biker-uk:
Bluechip - The bike is a WLC 45 bitsa, most of it 1942, 70s Triumph front end and a few later bits & pieces. Some pics & details here.

Re:Harmonographs, I made one once but they take up a lot of room.
If anyone wants to make a fancy drawing machine, one of these has a much smaller footprint :thumbup:


Mark

Bluechip:
Mark

Really nice bike. Always admired folk who get an assortment of bits, and make a unique bike. Not easy, I think.

Make the geometric chuck yourself ?
I seem to remember a rather OTT (22 stage ?) device on the cover of ME a long time ago, when it was in the small format. '50's ?

Nice to see one ..

Dave BC

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