Optical divider point assembly for harmonic spectrum analysis

Claim 1

An optical divider point assembly for harmonic spectrum analysis comprising: a cylindrical drum on a shaft having at least one line encircling said drum and a plurality of lines diverging in equal separation from a point on each said one line around said drum providing at least one set of spiral lines throughout 360*; a housing for said cylindrical drum journaling said shaft, said housing having a longitudinal slot in a lower side thereof under which said lines pass; a rotatable potentiometer having its movable contact mechanically coupled to said shaft to provide analog voltage readouts for all shaft and drum positions; and a beam splitting plate supported on said housing adjacent to said longitudinal slot to receive dots of light formed from the reflections of said lines through said slots on the top surface of said beam splitting plate forming virtual images whereby when supported on a frequency spectrum chart, the cylindrical drum shaft can be rotated to match the dots of reflected light from said lines as virtual images on the frequency spectrum chart on said beam splitting plate with parallel lines on said frequency spectrum chart representing fundamental and harmonics of frequencies to identify such frequencies to remote equipment by analog voltage readout of said potentiometer.