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Enchanted Objects
Blog Enchanted Objects Design Challenge - Matilda is not happy
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  • Author Author: Workshopshed
  • Date Created: 25 Mar 2015 6:24 AM Date Created
  • Views 1401 views
  • Likes 6 likes
  • Comments 11 comments
  • enchanted_cottage
  • enchanted_objects
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Enchanted Objects Design Challenge - Matilda is not happy

Workshopshed
Workshopshed
25 Mar 2015

"That” said Matilda, "is not good". Hans looked nervously over the top of Network Security for dummies. He knew that tone of voice and the daughter of a miner is not one to be trifled with.

 

Matilda held up her mechanism and Hans saw the distinct arc transcribed onto the paper. "Oh" he said.

image

Several hours later, later the floor was deep in cardboard scraps and scrumpled paper. Matilda looked despondent. "Perhaps the Historical society might be able to help” suggested Hans.

 

The next morning Matilda headed up the back stairs of the town hall. There, behind the reference library was a small door marked "Historical society”. Behind the small door was a small room piled high with boxes and papers. On a desk she saw the model locomotive from the faire. "Can I help" asked a voice from behind the model. A bespectacled man's face popped up from under the desk. Matilda explained her predicament. "Ah yes" said the man, ”that's a problem engine designers took years to crack. It wrecks the engine efficiency to the point we could not get our model to run". He pointed to a small electric motor attached to the bottom of the model. "Go next door to the reference library and ask for a book on Watt's Linkage” he suggested.

Watts_linkage.gif

 

 

Matilda returned home with a spring in her step and a book under her arm. She quickly made a model of the linkage and confirmed it did indeed generate the desired motion. She silently thanked Mr Watt for his fantastic solution.

image

Next Enchanted Objects Design Challenge - The Woodcutter and the Blacksmith

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Top Comments

  • mcb1
    mcb1 over 10 years ago in reply to Workshopshed +3
    I couldn't quite see it at first, but yes. There is another one we used that had fixing at one side. I'll try hunting that down... the name escapes me and my internet is well ...dialup would be faster…
  • Workshopshed
    Workshopshed over 10 years ago in reply to clem57 +1
    I wanted linear motion and thought the initial design would give me an approximation. However as you can see that still gives an arc based on the beam length. The new design is effectively a double ended…
  • mcb1
    mcb1 over 10 years ago +1
    Andy I was thinking of whether a watts linkage would work, when you did the first one. Most applications I've seen either have very long 'arms' or short travel distance, otherwise you get the sligt sideways…
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  • clem57
    clem57 over 10 years ago

    Workshopshed,

    I like that. How did you come up with the design?

    Clem

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  • Workshopshed
    Workshopshed over 10 years ago in reply to clem57

    I wanted linear motion and thought the initial design would give me an approximation. However as you can see that still gives an arc based on the beam length. The new design is effectively a double ended version of the Watt's Linkage. I plan to 3D print the parts but more on that in the Monday installment.

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  • Workshopshed
    Workshopshed over 10 years ago in reply to clem57

    I wanted linear motion and thought the initial design would give me an approximation. However as you can see that still gives an arc based on the beam length. The new design is effectively a double ended version of the Watt's Linkage. I plan to 3D print the parts but more on that in the Monday installment.

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