Page 331 - Robots Androids and Animatrons : 12 Incredible Projects You Can Build

Building the second mechanical device
The second device is a lever (see Figs. 16.13 and 16.14). The
lever I made is constructed out of wood and plastic. Machine
screws secure the air muscle and rubber bands to the lever arm.
A wood screw through the plastic arm is the pivot. A second wood
screw holds both the air muscle and rubber band. Operate this
device using the three-way air valve as before. When activated,
the lever moves up.

Pivot point
Muscle
attachment
point

Rubber
band

310

When the air muscle fills, it When the air is let out,
shortens, pulling the lever up. the muscle lengthens
and the elastic bands
pull the lever down.

16.13 Second mechanical device “lever”
Team LRN
Chapter sixteen