Geometrical instruments – Scriber – Straight-line
Patent
1992-05-29
1993-03-23
Haroian, Harry N.
Geometrical instruments
Scriber
Straight-line
33 413, B43L 1300
Patent
active
051952475
ABSTRACT:
A construction layout marker has two marker wheels (1 and 2) positioned in tandem on a wheel frame (3) with a handle frame (6) slanted upwardly from the front marker wheel (1). The two marker wheels are positioned a select distance apart and caused to rotate equally with a rotation equalizer (20-23) to coordinate selective marking with both marker wheels. A pivot marker fork (8) in combination with a wheel position marker (45, 46) provide accurate measurement and marking from a desired starting point. Automatically adjustable roller guides (25-31) at each side provide accurate distancing from edges (24) of surfaces (14) being marked. A brake (32) operated from the handle frame (6) holds the tandem marker wheels in fixed marker relationship for transferring marking indicia to parallel or offset construction surfaces and members. Non-slip surfaces (54) for different types of construction materials are positional on the marker wheels. Ink cartridges with felt marker edges are positional in each wheel. Also positional in each wheel optionally are select weights ( 55-59) to optimize traction of the marker wheels. Foldability is provided for both the handle frame and the wheel frame.
REFERENCES:
patent: 56546 (1966-07-01), Foster
patent: 1705415 (1929-03-01), Melliger
patent: 2451595 (1948-10-01), Wheeler
patent: 3046884 (1962-07-01), Pearson
patent: 3546779 (1970-12-01), Klein
patent: 3896725 (1975-07-01), Grover
patent: 3988835 (1976-11-01), Thornton
patent: 4372049 (1983-02-01), Hogue
patent: 4993159 (1983-02-01), Hull et al.
Bremer Systems, Inc.
Haroian Harry N.
Hinkle James A.
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