Title:
AN ANGLE DIVIDER
Document Type and Number:
WIPO Patent Application WO/1995/003182
Kind Code:
A1
Abstract:
A drawing instrument (20) for dividing angles into fractional components is disclosed. In the case of bisection, a simple slot (27) and equidistant points (21, 22, 23, 24) along a perpendicular bisector is disclosed. In the case of other fractions, for example trisection and quadrisection, shaped slots (33A, 34A, 35A, 33B, 34B, 35B) are provided so as to define the locus of the division point, with the point defined by scribing an arc intersecting the loci, and joining the intersection to the vertex of the angle. The instrument may also include additional features such as rulers (29, 31) protractors (28) and measured holes (30) for drawing circles and arcs.
Inventors:
LEWIS JOHN TREVOR (AU)
SUTTON STEVEN MICHAEL (AU)
SUTTON STEVEN MICHAEL (AU)
Application Number:
PCT/AU1994/000402
Publication Date:
February 02, 1995
Filing Date:
July 15, 1994
Export Citation:
Assignee:
LEWIS JOHN TREVOR (AU)
SUTTON STEVEN MICHAEL (AU)
SUTTON STEVEN MICHAEL (AU)
International Classes:
B43L9/00; B43L13/00; (IPC1-7): B43L13/00
Foreign References:
| DE1050067B | ||||
| US2033715A | 1936-03-10 | |||
| US2883754A | 1959-04-28 | |||
| US3460261A | 1969-08-12 | |||
| GB2060501A | 1981-05-07 | |||
| US3693261A | 1972-09-26 |
Other References:
See also references of EP 0710186A4
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