Geometrical instruments – Scriber – Straight-line
Patent
1981-06-29
1983-02-08
Haroian, Harry N.
Geometrical instruments
Scriber
Straight-line
33 37, 101328, B43L 1300
Patent
active
043720498
ABSTRACT:
Disclosed are a method and apparatus for marking beams for the placement of studs, rafters and joists. The invention uses three instruments for measuring, aligning and marking. The first and simplest instrument is a tee-square instrument which requires independent measuring to determine the desired framing position. At the desired position, ink pads are pressed against the beam to mark the location. The ink pads protrude from a blotter head assembly which releasably attaches through a neck to a refillable ink cartridge. Single center distances of regular and uniform spacing are marked with an instrument having blotter head assemblies removably mounted through the periphery of a wheel at even fractions of the circumference. The wheel is rotably mounted on an axle to which a handle is attached and the wheel has gripping teats which insure the accurate translation from circumferential to linear distances. A multi-wheel instrument is disclosed for single pass measuring and marking of beams to which more than one type of framing element will attach. Different centering distances are provided by wheels of different circumferences simultaneously rolling upon the beam. The wheels are carried on an off-set axle to which a handle is attached. Further it is preferred that the wheels be interconnected with minor imposition to relative movement. It is also preferred to provide a center guide to aid in aligning at the beginning of a run.
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Cantrell Thomas L.
Haroian Harry N.
Schley Joseph H.
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