Variable stiffness rule blade, rule employing same, and...

G - Physics – 01 – B

Patent

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33/153, 26/201

G01B 3/10 (2006.01) B23P 15/00 (2006.01)

Patent

CA 1193855

ABSTRACT OF THE DISCLOSURE A coilable measuring blade which is not a spring for coilable rules has a concavo-convex cross section which has an intermediate portion with a smaller arc and greater height extending through and beyond the normal standout length to provide greater standout length. The blade may also have an outer terminal portion of greater height to require its deflection as its enters the rule casing and thereby provide reduction of the speed with which the blade is being retracted into the casing.

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