Geometrical instruments – Distance measuring – By flexible tape
Patent
1992-02-25
1993-09-21
Will, Thomas B.
Geometrical instruments
Distance measuring
By flexible tape
242848, 2421073, G01B 310
Patent
active
052457613
ABSTRACT:
A retractable tape measure having a housing with an opening therein through which a portion of the tape extends with the remainder of the tape being coiled around a spring biased reel having a hub around which the tape is coiled. Opposed annular ends on the hub retain the tape coiled therearound. Each of the annular ends have a serrated circular peripheral edge with about 90 to about 150 serrations. Locking mechanism is shiftably mounted on the housing movable into and out of engagement with the serrated edges. The locking mechanism has a plurality of serrations thereon which when engaged with a plurality of serrations on each annular end provide a positive lock for the tape coiled around the reel hub to prevent further withdrawal of the tape.
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