Structure of measuring tape

Details Structure of measuring tape Structure of measuring tape

1993-11-02

1995-09-12

Wirthlin, Alvin

Geometrical instruments

Distance measuring

By flexible tape

33767, G01B 310

Patent

active

054488370

ABSTRACT:
Disclosed is a measuring tape including a tape reel driven by a reversible motor through an annular wheel via a first transmission gear set to let off a tape blade for taking measurements or to rewind it by means of the control of a switch, a guide roller and a pressing roller driven by the annular wheel through a second transmission gear set to guide out the tape blade at a higher speed than the tape reel so as to prevent the tape blade from being loosened, and a release control mechanism controlled by the switch to move the pressing roller within the operative and the non-operative positions.

REFERENCES:
patent: 3215359 (1965-11-01), Sanders
patent: 3561695 (1971-02-01), Wood
patent: 4186490 (1980-02-01), Quenot
patent: 4551847 (1985-11-01), Caldwell
patent: 4765063 (1988-08-01), Sing
patent: 5044089 (1991-09-01), Petkovic et al.

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