Geometrical instruments – Area integrators – Electrical
Patent
1986-09-02
1987-05-26
Little, Willis
Geometrical instruments
Area integrators
Electrical
33666, G01B 310
Patent
active
046674128
ABSTRACT:
The invention provides a self-marking tape measure for hand-held use. A tape housing has a crosswise-positioned marker cartridge affixed removably in a marker cartridge channel through the housing base below the tape exit aperature. A marking substance like chalk or a soapstone composition formed into a three-surfaced triangular member with any edge being useful for marking comprises the marker cartridge. The marker cartridge is positioned in the marker cartridge channel and secured there by a spring-action snap lock. One edge of the marker cartridge protrudes downwardly through a slot in the tape housing base sufficiently to make a mark on a contacted surface when the tape housing is moved with a sideways motion. The points of two triangular sights in the upper opened walls of a tape support housing elongation are aligned with the protruding marker edge. The sights allow visual accurate tape measurements, and a sideways movement of the tape housing marks the measured position on a contacted surface. A storage compartment is provided in the tape housing for replacement marker cartridges.
REFERENCES:
patent: 2649787 (1953-08-01), Kobayashi
patent: 3063157 (1962-11-01), Keene
patent: 3526964 (1970-09-01), Clark, Jr.
patent: 3838520 (1974-10-01), Quenot
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