Tape rule with resilient lock

Details Tape rule with resilient lock Tape rule with resilient lock

G - Physics

01

B

G01B 3/10 (2006.01)

Patent

CA 2603361

One aspect of an invention disclosed herein relates to improved durability of the thumb engaging portion of a tape rule locking assembly. In accordance with this aspect, there is provided a retractable rule assembly comprising a housing assembly; a reel rotatably mounted in the housing assembly; and an elongated blade formed of a ribbon of metal being wound on the reel. The elongated blade has measuring indicia formed on a concave side thereof; and a coil spring formed of a ribbon of metal is constructed to rotate the reel in the housing assembly in a direction to wind up the elongated blade. A blade holding assembly for holding the blade in a position of extension outwardly of said housing, said blade holding assembly comprising a resilient thumb engaging portion and a receiving region behind the thumb engaging portion to enable the thumb engaging portion to deform into the receiving region to absorb impact.

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