centrolineads

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  9. [equipment for drafting, drawing, and writing]
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  11. drafting equipment
  12. drafting instruments
  13. centrolineads
Scope note
Instruments used to render perspective drawings. These consist of three rulers joined together in a Y-shape so that a central ruler, along which lines are to be drawn, may be orientated correctly by adjusting the position of the legs that rest against two nails placed on the drawing board. As the device pivots, the main bar changes slope, resulting in drawn lines that orient to a vanishing point that would be otherwise difficult to obtain.
centrolineads
Accepted term: 16-Dec-2024