Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Measuring Devices (hierarchy name)
5. measuring devices (instruments)
6. [measuring devices for extent]
7. distance measuring devices
8. linear distance measuring devices

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment
4. Tools and Equipment
5. equipment
6. equipment by mode of operation
7. hand tools

Narrower term/s

• curves (rulers)[+]
  • Brook's curves
  • flexible curves
  • French curves
• [rulers by function][+]
  • board rules
  • log rules
  • scales (rules) [+]
    • architects' scales
    • engineers' scales
    • bar scale (scales)
  • [rules for type composition] [+]
    • type gauges
    • line gauges
    • pica rulers
  • carpenters' rules
• [rulers by form][+]
  • folding rules
  • yardsticks
  • caliper rules
  • extension rules
  • bench rules
  • blindman's rules
  • shrinkage rules
  • ten-foot rods
  • zigzag rules
• parallel rulers (navigational tools)

Anotations

Scope note:

Straight-edged strips or cylinders of medium size, usually of wood, metal, plastic, or ivory and having demarcations to indicate units of measurement, used for measuring and for guiding a pen, pencil, or other marking-instrument in forming straight lines upon paper or another material. They are used in geometry, drafting, drawing, carpentry, building, interior design, crafts, and other disciplines. For very long bars or strips of wood or metal having straight and true edges and used for a variety of purposes, including cutting or establishing the evenness of surfaces, use "straightedges."