Geometrical instruments – Straightedge type – Rules
Patent
1984-04-23
1985-07-30
Stearns, Richard R.
Geometrical instruments
Straightedge type
Rules
33484, 33492, B43L 700
Patent
active
045313024
ABSTRACT:
A replacement edge drafting device attaches to a drafting rule having a damaged edge and provides a new edge in place of the damaged edge. The device has an elongated body formed with a drawing section that provides the new edge and with an attachment section that joins the body to the damaged drafting rule.
REFERENCES:
patent: 2182027 (1939-12-01), Little
patent: 2366449 (1945-01-01), Keuffel et al.
patent: 2522908 (1950-09-01), Szabo
patent: 2567554 (1951-09-01), Davey
patent: 3178826 (1965-04-01), Aisen
patent: 3507045 (1970-04-01), Rives
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