Geometrical instruments – Scriber – Straight-line
Patent
1974-12-16
1976-11-02
Aegerter, Richard E.
Geometrical instruments
Scriber
Straight-line
101329, B25H 700
Patent
active
039888355
ABSTRACT:
A marking device has a cylindrical housing journalled to an extended arm. The cylindrical housing has an outer peripheral surface whose circumference preferrably corresponds to a standard linear distance that is normally encountered in the building industry. The peripheral surface has at least one marking element extending radially from it so that as the cylindrical housing is rotated over a workpiece, the marking element leaves a mark on the workpiece that serves as a centerline measurement for the accurate alignment and placement of building components on the workpiece. The extended arm of the device includes a movable guide that may be extended radially beyond the peripheral surface of the cylindrical housing for guiding the marking device as it is moved along the workpiece or that may be retracted radially from its extension beyond the peripheral surface so that the marking device may be used on an extended planar surface without the guide interfering with the travel of the device over the planar surface.
REFERENCES:
patent: 973534 (1910-10-01), Meyerheim
patent: 2451595 (1948-10-01), Wheeler
patent: 2498980 (1950-02-01), Bowling et al.
patent: 3046884 (1962-07-01), Pearson
patent: 3546779 (1970-12-01), Klein
Aegerter Richard E.
Footland L.
Trenor Fred C.
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