Drafting apparatus
US4383375A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1981 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Mar 5, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S33/01
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A drafting apparatus for use with a drawing board having a side edge portion and a planar drawing surface in which a guide track extends in spaced relation to the side edge of the board and is mounted from the board for adjustment into several different positions in relation to the board. A T-square having a head body member provided with wheels for rolling engagement with the guide track and carrying a strip of material serving as an armature for coaction with a pair of spaced magnets carried by the head member of the T-square. The magnets are carried on a bar member provided with pivotal movement about a longitudinal horizontal pivot axis parallel to the side edge of the board, the magnet carrying bar member having an actuator portion for releasing the magnets from the armature strip. A slidable lock element is carried by the actuator portion to lock the magnet carrying bar member in release position if desired. A T-square head portion having supporting wheels mounted for adjustment relative to the head body portion to accommodate the T-square blade to different thicknesses of graphic media used on the drawing board. A drawing board provided with a support frame providing angular…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.