Geometrical instruments – Scriber – Curved line
Patent
1984-01-24
1985-09-24
Martin, Jr., William D.
Geometrical instruments
Scriber
Curved line
33149H, 33152B, B43L 920
Patent
active
045425876
ABSTRACT:
Drawing compass apparatus includes an axis defining portion, a grip portion, and a fastening portion. The axis defining portion includes an elongated leg member, the leg member having a blunt end section, and a short point section extending from a part of the blunt end section. A circular section is disposed at an end of the leg member opposite to the blunt end section thereof, the circular section being disposed offset of a longitudinal axis of the leg member. A longitudinal groove extends along the full length of the axis defining portion with the circular section having a central opening offset from the longitudinal groove. The grip portion includes a circular member disposed adjacent to the circular section of the axis defining portion, the circular member including a central opening aligned with the central opening of the circular section. The circular member includes a straight groove across a surface thereof, the groove being offset from the central opening thereof the same distance as the longitudinal groove of the axis defining portion is from the central opening of the circular section thereof. The straight groove of the circular member extends away from the circular section of the axis defining portion, with the longitudinal groove of the axis defining portion extending away from the circular member; the fastening portion extends through the central openings of the circular section and the circular member and secures same together.
REFERENCES:
patent: 515075 (1894-02-01), Deats
patent: 3537181 (1970-11-01), Graef
patent: 3683505 (1972-08-01), Graef
Martin, Jr. William D.
Urban Arthur L.
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