Drafting instrument
US5568690A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1995 |
| Grant date | Oct 29, 1996 |
| Priority date | — |
| Expiry date | Jan 5, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L7/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An improved drafting instrument is provided and consists of a base board and a slide member. The instrument is so constructed that various geometrical figures, such as squares, rectangles, right-angled isosceles triangles and regular triangles, are accurately drafted in the various dimensions between a minimum and maximum dimension without using conventional frame rules. The base board is provided with one or more openings, and guide rails along which the slide member is slid and positioned for drawing. By displacing the slide member along one of the guide rails and positioning against the guide rail, a figure having a desired dimension is formed and drafted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.