Tape measure with lock button

Details Tape measure with lock button Tape measure with lock button

1986-07-11

1987-05-12

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

242 848, 2421073, G01B 310, B65H 7548

Patent

active

046638547

ABSTRACT:
A tape measure includes a housing having first and second half and a bottom access door which is openable to provide an access port to the interior of the housing. A spool is rotatably mounted upon an axle which has an integrally formed ratchet plate. The ratchet plate engages ratchet teeth that are integrally formed within the interior surface of the housing to provide for rotation of the axle to load a spring within the spool to a desired tension. The ratchet teeth normally prevent rotation of the axle to unload the spring tension. An overriding mechanism allows the axle to axially move to disengage the ratchet plate from the ratchet teeth to provide for rotation of the axle to unload the spring mechanism. A lock button has a thumb operating section at the top portion of the housing and has a pressure regulating section which regulates the pressure that the bottom end of the lock button exerts against the tape.

REFERENCES:
patent: 2728143 (1943-12-01), Buchet
patent: 3435529 (1969-04-01), Quenot
patent: 3698004 (1972-09-01), Brown et al.
patent: 3716201 (1973-02-01), West
patent: 4194703 (1980-03-01), Roe
patent: 4449302 (1984-05-01), Drechsler

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