Abstract Circular scale device, and method of using it, for helping a pilot of a VOR-equipped aircraft, within range of two VOR broadcast points, determine and record on the device the location of the aircraft relative to any desired third point which is the intersection of VOR radials from the two VOR broadcast points, and determine on the device course directions in which to proceed to the desired third point. The device includes a base plate and two pointer members each pivotably mounted to the center of a circular scale on the base plate, wherein each of the pointer members has pointing means at each end of a line extending thereacross through the center and has directional means visually distinguishing one side of the line from the other.
A device comprising a base plate having a circular scale, first and second disc members pivoted at the center of said scale for rotation relative to each other and to said plate about the center of said scale, said first disc disposed between said plate and said second disc, each of said discs having a diameter line extending across the disc, said first disc being dark in color over the one-half thereof on one side of its diameter line and light in color over the other one-half thereof, and said second disc being of a matching dark color over the one-half thereof on one side of its diameter line and transparent over the other half thereof.
Claim 2
Independent Claim
116 words
A device comprising a base plate having a circular scale, first and second disc members pivoted at the center of said scale for rotation relative to each other and to said plate about the center of said scale, said first disc disposed between said plate and said second disc, each of said discs having a diameter line extending across the disc, said first disc being dark in color over the one-half thereof on one side of its diameter line and light in color over the other one-half thereof, and said second disc being of a matching dark color over the one-half thereof on one side of its diameter line and transparent over the other half thereof.