A Straight Line

The Constrained Ball is one of those concepts I can easily see myself buying from a late night infomercial. I’m not saying it’s bad but the novel approach to a simple kind of problem is endearing. Fitted with a rubber gasket, the gadget helps you draw straight lines and indicates the length. OMG, is this the end of the ruler’s dominance?!? No but I quite like this concept. I’m a stickler for drawing straight lines. It’s either gotta be straight and perfect or it’s a no-go for me.


Designer: Giha Woo

99 Comments

  • anon says:

    Not so good, it won't keep a line straight – you only need to look at the old hand-held scanners to see the problems. I'm also doubtful of how well it could measure a line – again look to analog map measuring tools and their relative inaccuracy. Then again, maybe I'm the only one who uses CAD for precise drawings these days.

  • anon says:

    Not so good, it won't keep a line straight – you only need to look at the old hand-held scanners to see the problems. I'm also doubtful of how well it could measure a line – again look to analog map measuring tools and their relative inaccuracy. Then again, maybe I'm the only one who uses CAD for precise drawings these days.

  • Golan says:

    The concept does indeed make sence, It is not a wheel, it is a gear, a gear which creates traction. The traction would help you keep your hand steady. Obviously if you have Parkinson disease this wont help you, but then again a straight line is the least of your worry's at that point.

    • anon says:

      I suggest you know a little more about gears to call this one – it has straight knurling for traction but in no way would keep ones hand steady. That would require at least 1 more point of contact with the paper surface to give the minimum needed for stability. All in all, this is far more expensive an idea than simply using a ruler (or CAD).

  • Golan says:

    The concept does indeed make sence, It is not a wheel, it is a gear, a gear which creates traction. The traction would help you keep your hand steady. Obviously if you have Parkinson disease this wont help you, but then again a straight line is the least of your worry's at that point.

    • anon says:

      I suggest you know a little more about gears to call this one – it has straight knurling for traction but in no way would keep ones hand steady. That would require at least 1 more point of contact with the paper surface to give the minimum needed for stability. All in all, this is far more expensive an idea than simply using a ruler (or CAD).

  • Dan says:

    This can't possibly work.

    • chisel says:

      the thing is a cool concept, i really like its simple design but rationalizing it i realize the the ruler would beat it where referencing another point is concerned for example connecting accurately two known points due to the lack of an angular absolute. however it surely looks workable to prevent unsure wobbly lines.

  • Dan says:

    This can't possibly work.

    • chisel says:

      the thing is a cool concept, i really like its simple design but rationalizing it i realize the the ruler would beat it where referencing another point is concerned for example connecting accurately two known points due to the lack of an angular absolute. however it surely looks workable to prevent unsure wobbly lines.

  • Jay says:

    No way do to draw a straight line by freehand, I mean "exactly straight". It's gonna end up with ruler anyway.

  • Jay says:

    No way do to draw a straight line by freehand, I mean “exactly straight”. It's gonna end up with ruler anyway.

  • the pieman says:

    this is even worse that the spring loaded potato masher, why invent something that requires power and has moving parts and only sort of works when the ruler clearly is the weapon of choice here.

    resign , immediately

  • the pieman says:

    this is even worse that the spring loaded potato masher, why invent something that requires power and has moving parts and only sort of works when the ruler clearly is the weapon of choice here.

    resign , immediately

  • Mlah says:

    As a measuring tool sure it might be handy if you could fit the circuitry in such a tiny place. If you really want to draw a straight line you don’t even need a ruler, just use a piece of paper, or a book, or another pencil, or any number of straight edges that you are likely surrounded by.

  • Mlah says:

    As a measuring tool sure it might be handy if you could fit the circuitry in such a tiny place. If you really want to draw a straight line you don’t even need a ruler, just use a piece of paper, or a book, or another pencil, or any number of straight edges that you are likely surrounded by.

    • Mike R says:

      For those who said you will still need a ruler to draw a straight line, a draftsmen doesn’t use a ruler to to draw a line; he uses a triangle.

  • Steve says:

    This would not work. I’ll stick with CAD when I need perfect drawings, and if I need a straight line I’ll grab my stapler or other notebook or coaster or you know… ruler.

  • Steve says:

    This would not work. I’ll stick with CAD when I need perfect drawings, and if I need a straight line I’ll grab my stapler or other notebook or coaster or you know… ruler.

  • A long roller (or two) instead of a little wheel would have more contact with the paper and be more stable… that really is the only way I see this design having a chance of working properly. Perhaps some sort of spring/suspension between the pen and said roller to accommodate different writing angles/pressures?

  • A long roller (or two) instead of a little wheel would have more contact with the paper and be more stable… that really is the only way I see this design having a chance of working properly. Perhaps some sort of spring/suspension between the pen and said roller to accommodate different writing angles/pressures?

  • @uopjo6 says:

    There goes our touches

  • @uopjo6 says:

    There goes our touches

  • Hank says:

    For an artist with one usable hand this looks like a good idea. Where can I buy or find one to evaluate?

  • Hank says:

    For an artist with one usable hand this looks like a good idea. Where can I buy or find one to evaluate?

  • La says:

    I think it is a great concept. But like all inventions, some quirks need to be worked out which is expected. But for people to outright bash this design is sad. I’m wondering what did they invent? Trust and believe if they invented something others would poke holes in it also. Perfection does not exist. Give the designer a break. Instead of poking all of those holes in his design, design something better to address your concerns! But usually people who speak badly about what others have created can not create a better product.

  • mlah says:

    The thing is your artist didn’t invent anything himself. He just said “Wouldn’t it be cool to have a device that would make you draw straight lines and magically measure distance, it’ll look like this. Man I am the best inventor ever” The artist doesn’t understand the basics of the necessary component and ignores things like practicality and the cost versus the benefits. Honestly its insulting to all those who actually work hard making real products. Its not about perfection its about artists pretending to be something they aren’t.

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    If some one wants to be updated with latest technologies afterward he must be pay a quick
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  • Mike R says:

    For all those experts who said you need a ruler to draw a straight line, a draftsmen doesn’t use a ruler he uses a triangle

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  • Rohit says:

    Very great idea I m also using cad in solid edge.
    Read something good at imparallel.blogspot.com

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