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Pantograph (wikipedia.org)
68 points by Tomte on June 4, 2017 | hide | past | favorite | 13 comments

A cool application of this technology is Matthias Wandel's pantorouter: https://www.youtube.com/watch?v=8wZ1v4PIsYI

There is also a really nice haptic device design based on this principle: http://www.cim.mcgill.ca/~haptic/devices/pictures/Pantograph...

That is cool, and the sideways orientation is new to me. But using a pantograph with a router isn't terribly new. I remember doing it 30 years ago with an off-the-shelf product.

A recent thread about Matchbox cars had a video in comments that shown how they used a similar contraption to scale down a model cut out from (I think) wood.

How about https://en.wikipedia.org/wiki/Planimeter with which you can find an area of a arbitrary 2d shape just by tracing it's outline?

(I saw a pantograph in a museum yesterday; it's weird, I swear HN is looking over my shoulder sometimes.)

Same here! Deutsches Technikmuseum?

Sydney Maritime Museum

Of course the use of this device which is most well known among children is the "Extendo Boxing Glove" trope [1].

[1] http://tvtropes.org/pmwiki/pmwiki.php/Main/ExtendoBoxingGlov...




Disagree all you want. Both the community and the moderators have made it abundantly clear that reposts of stories that haven't got traction (or stories with traction, but years ago) are not only okay, but actively encouraged. The FAQ specifically say so!

Stories always fall between the cracks; it's normal for a story to get zero comments and maybe one upvote at one time, and hundreds of upvotes and comments another time.

If you hide a story, are the duplicates also hidden?


I know you're joking, but I'm glad you specified random science links instead of random links from Wikipedia.

When I've browsed completely random links from Wikipedia, the overwhelming stuff that comes up are names of places (like every little park or named lake in the world), names of anyone who has ever played professional sports no matter how minor, names of flowers, plants, political parties, parades, events, student organizations, and generally names of places, persons, and things.

Science is actually a tiny fraction of Wikipedia. What I'd call scientific concepts, like relativity, continental drift, evolution, big bang theory, dinosaur K-T extinction theory are an absolutely miniscule fraction of Wikipedia knowledge.

> names of flowers, plants

Assuming you mean a [partial] description of a plant, then that is botany -- individually, each page isn't a big concept, but I don't think they deserve to be lumped in with sports players etc.

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