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Trammel of Archimedes

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Project by mtairymd posted 02-14-2016 05:05 PM 1351 views 5 times favorited 8 comments Add to Favorites Watch

Build Instructions
http://www.instructables.com/id/Trammel-of-Archimedes/

This mechanism consists of a base with two slots intersecting at right angles. Two sliders are confined within the slots and are attached to a handle by pivots (screws) at fixed positions along the handle. The mechanism can be used for drawing a perfect ellipse. This is done by positioning a writing utensil at the end of the handle while making a full revolution. For more information/history, see here.

With that said, it is often sold in novelty shops with interesting names like Bullsht Grinder, Bullsht Masher or Do-Nothing Machine. Interestingly, most of the names are preceded with state names such has Arkansas, Kentucky, etc. I guess that’s how locals make fun of their neighbors

Video of Build
https://www.youtube.com/watch?v=_tXe0c9aUSQ





8 comments so far

View gfadvm's profile

gfadvm

14940 posts in 2152 days


#1 posted 02-15-2016 01:01 AM

I’ve made several of those for toys but have a long handled one in the shop to draw ellipses. Nice job.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View wiser1934's profile

wiser1934

498 posts in 2609 days


#2 posted 02-15-2016 02:31 AM

besides the other names, i have heard it called a smoke grinder.l nice job.

-- wiser1934, new york

View woodbutcherbynight's profile

woodbutcherbynight

2424 posts in 1871 days


#3 posted 02-15-2016 02:35 AM

Cool build, have to look into making one and leaving it out for guest to figure “what is it?”.

-- Live to tell the stories, they sound better that way.

View helluvawreck's profile

helluvawreck

23155 posts in 2329 days


#4 posted 02-15-2016 04:15 PM

You did a nice job on this. It’s very interesting.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View mtairymd's profile

mtairymd

96 posts in 843 days


#5 posted 02-15-2016 09:16 PM



I ve made several of those for toys but have a long handled one in the shop to draw ellipses. Nice job.

- gfadvm


Thank you.

View mtairymd's profile

mtairymd

96 posts in 843 days


#6 posted 02-15-2016 09:17 PM



besides the other names, i have heard it called a smoke grinder.l nice job.

- wiser1934

Thanks. I’ve now heard it called about 20 different things. Most have to do with “do nothing” or “grinder”

View mtairymd's profile

mtairymd

96 posts in 843 days


#7 posted 02-15-2016 09:18 PM



Cool build, have to look into making one and leaving it out for guest to figure “what is it?”.

- woodbutcherbynight

I brought it into work today and it did entertain a few people

View mtairymd's profile

mtairymd

96 posts in 843 days


#8 posted 02-15-2016 09:18 PM



You did a nice job on this. It s very interesting.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

- helluvawreck

Thank you

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