When stylus F is moved along curve y=f(x), carriage 1 slides along guide link 2. Bent sliding link 3 turns about pivot B, moving slider 4 along link 5. At this, slider 6 is moved along link 3. Measuring wheel 7 indicates the area under the curve (between the curve and the x-axis), i.e. A=c∫(y)dx, where c is a constant of the Integrator. Measuring wheel 8 indicates the static moment Mx=∫(y)dA. Measuring wheel 9 indicates the quantity l_x=∫(y²)dA.
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