Ruler

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G - Physics

01

B

G01B 3/04 (2006.01) G01B 3/06 (2006.01)

Patent

CA 2440611

A distance measuring tool including a plurality of substantially flat unit members each having ears at opposite ends of opposing sides and measurement marks along a side extending between the opposing sides, with pivot members pivotably secured between the ears at opposite ends of opposing sides of adjacent unit members. The unit members are pivotally secured to adjacent pivot members along two spaced pivot axes, where the ears define the pivot axes a distance X from the ends of the ears and pivot members define the pivot axes spaced apart a distance at least 2X. The unit members have a thickness Y and the pivot members have a width W, where 2X <= W <= 2Y and, in another form, the ears are rounded to avoid interference with an adjacent ear when the unit members are pivoted relative to the pivot members. The pivot axes are defined by axially aligned pins pivotably received in recesses.

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