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SYSTEMS PREPARATION QUESTIONS 2008 - 4 |
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V. Ryan © 2008-2017 |
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A second version of the clown model has been
manufactured (see previous question). This is
mechanically operated by a rotating device. |
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Draw the mechanical device on the
diagram above |
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ANSWER |
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What is the function of the pivot ? |
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ANSWER |
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The pivot allows the barrier to rotate at a specific
point. In this case the barrier rotates upwards and downwards about the
pivot. |
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Name the device and explain how
it works. |
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DEVICE NAME:
_________________________________________ |
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How it works: |
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ANSWERS |
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DEVICE NAME: Eccentric Cam |
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How it works: |
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As the eccentric cam rotates in a clockwise direction
the barrier is pushed upwards at a constant rate. It then descends at a
constant rate back to its original position. |
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What is the function of the
spring ? |
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ANSWER |
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What is the function of the
spring ? |
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The spring returns the arms to a level position when
the eccentric cam has dropped to its lowest position. It also helps ensure
that the motion of the entire mechanism is smooth. |
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