Ellipsograph drafting apparatus
US4045875A · kind A · utility
1Cited by
3References
15Claims
0Family size
Inventor
Key dates
| Filing date | Mar 18, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L11/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
This invention is an ellipsograph drafting apparatus operable to draw ellipses of any desired ratio of major and minor axes limited only by practical size of the device. The ellipsograph drafting apparatus includes a main support means, an elliptical control means, and an intermediate connector means connecting the elliptical control means to the main support means. The elliptical control means includes a marking instrument and actuator assembly which is operable to draw ellipses on a support surface through preselected movement of a pivot arm and slide assembly in a three dimensional manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.