Geometrical instruments – Scriber – Curved surface
Patent
1995-05-03
1997-07-29
Bennett, G. Bradley
Geometrical instruments
Scriber
Curved surface
33 2701, 33 42, 33529, B43L 900
Patent
active
056511841
ABSTRACT:
A circumscribing apparatus for marking a circular reference line about a cylindrical object has a first side. A first frame member has two spaced-apart guide members extending outwardly on the first side of the apparatus. The two guide members fall along a first straight line. A second frame member extends outwardly from the first frame member to a position on a second straight line which is perpendicular to the first line. A scribe is connected to the second member adjacent the position and has a marker extending outwardly on the first side of the apparatus. The apparatus can be used in conjunction with a wrap-around sleeve placed about the cylindrical object. The sleeve has a straight edge which extends about the object along a circular path when the sleeve is fitted. The apparatus is placed against the object with the two spaced-apart guide members contacting the edge. The marker is held against the object at a position spaced-apart outwardly from the edge. The apparatus is moved about the object so the projections stay in contact with the edge and the marker marks a circular line about the object.
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Bennett G. Bradley
Cameron Norman M.
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