.
 Life around us is
full of mechanisms making living easier, and
there must have been a time when
 you wished that you
know how to design mechanisms to help you with
different things.
 Well, I'm going to
teach you some ways to design mechanisms of your
own.
 You may think that it
is hard and complicated process; on the contrary,
 it is a very striate
forward method that you will like a lot. Let's
get to business then.
 The following is a
list of different design methods.
.
 Let's say that
you want to move something from one position
to another. We will
 suppose that the
object we want to move has a triangular
shape. Here are the steps
 to obtain the
desired mechanism:
 1. On a
paper, draw the two positions desired.
 2. On the
first position of the object, label one
angle A1 and another one B1.
 3. On the
other position, mark A2 and B2. Note that
A1 and A2 must correspond
 in both
positions, and the same goes for B1 and
B2.
 4. Draw a
line joining A1 and A2.
 5. Draw a
line joining B1 and B2.
 6. From the
middle of the line A1A2, draw a
perpendicular line. Label it C.
 7. From the
middle of the line B1B2, draw a
perpendicular line that will intersect
 with the line
from A1A2. Label it D.
 8. Locate the
intersection between the two lines. Label
it P.
 9. Pick any
point on the line C. Label it A. A has to
lie between P and A1A2.
 10. Pick any
point on the line D. Label it B. B has to
lie between P and B1B2.
.
 Now, you want to
move something from one position to second
and third positions
 simultaneously.
We will suppose that the object we want to
move has a triangular
 shape. Here are
the steps to obtain the desired mechanism:
 1. On a
paper, draw the three positions desired.
 2. On the
first position of the object, label one
angle A1 and another
 one B1.
 3. On the 2nd
position, mark A2 and B2. Note that A1
and A2 must
 correspond in
all positions, and the same goes for B1
and B2.
 4. On the 2nd
position, mark A3 and B3. Note that A1,
A2, and A3
 must
correspond in all positions, and the same
goes for B1, 2, & 3.
 5. Draw a
line joining A1 & A2, and another
joining A2 & A3.
 6. Draw a
line joining B1 & B2, and another
joining B2 & B3.
 7. From the
middle of the line A1A2, draw a
perpendicular line.
 8. From the
middle of the line A2A3, draw a
perpendicular line that
 will
intersect with the line from A1A2.
 9. Locate the
intersection between the two lines. Label
it A, the 1st
 ground point.
 10. Repeat
Steps 7, 8, and 9 for B1, B2, and B3.
.
 Of course, there are
other ways to design mechanisms; however, they
get more complicated than
 these. You can contact
me in case
you have any questions, and I will be happy to
help you.
.
(c) 1998 Jassim Alhor. All Rights
Reserved.
