Keyboard Playing Kat

Thu, 21 Apr 2016

Inspired by all the piano playing cats on the internet I’m working on a cam powered keyboard playing cat model. Here’s the sketch. Turn the handle and the Keyboard Kitty pounds at the piano keyboard.


My plan is to have two weighted cam follower in the base, one for each arm. When the cam is in the down position it will pull the arms upwards. When the cam follower is lifted the weight of the arm drops the arms back down again. Because the arm is operated with a pull rather than a push I can use a simple strap to operate the arms rather than having to make a rigid push rod. Hopefully this will make the mechanism simple to construct.

Here I’ve put together a prototype arm with a linkage and axle.


In my prototype I’ve fitted each arm into a separate body half. This allows the two axles, one in each shoulder, to move independently.


A simple wide strip of card joins to the two side together.


Pulling each strap raises the approriate arm. Just like that!


Here’s my artist impression of how it might all fit together.

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Comments (4)

  • Smelter April 22, 2016 at 9:35 am

    This has got to be a

    This has got to be a winner!

    Lets all do a mass "Like" on facebook!

    (If you have never done from here, it's the little blue "F" at the top left hand side)

    • JohnW April 22, 2016 at 11:53 am

      Interesting, there is a cam
      Interesting, there is a cam located under the piano….

  • JohnW April 22, 2016 at 11:37 am

    Last night the cat jumped up
    Last night the cat jumped up on the piano and started walking across the keys. My wife and I started to laugh because we had seen this model on Twitter yesterday. I wonder if that is where Rob got the idea.

  • maxlrainer April 22, 2016 at 7:38 pm

    The newsletter about the

    The newsletter about the keyboard playing cat attracted my interest at once. I already did the simple but cute keyboard cat, offered by tubby paws. I'm very curious abaut your progress, Rob, and hope to built your cat  as soon as possible.

    Cheers
    maxlrainer

Comments are closed.