EP 0065375 B1 19841128 - SET SQUARE
Title (en)
SET SQUARE
Publication
Application
Priority
GB 8113988 A 19810507
Abstract (en)
[origin: EP0065375A1] A set square (1) has substantially the form of a 30/60/90 DEG triangle (ABC) having therein an aperture (2) having sides (p, q, r) at 15 DEG and 45 DEG to each external side. The aperture (2) may be in the form of a 30/30/120 DEG triangle (PQR) disposed with its longest side (q) closest to the hypotenuse (b) of the 30/60/90 DEG triangle and at an angle of 15 DEG thereto, said side (q) diverging from the hypotenuse (b) towards the 30 DEG vertex (A) of the 30/60/90 DEG triangle. Preferably a line (3) is indicated perpendicular to one of the external sides (c) other than the hypotenuse (b), the line (3) being indicated adjacent that side (c) and extending across the aperture (2), and being indicated on either side thereof. There may be a protractor scale (5) whose origin is at the intersection of the line (3) and the perpendicular side (c).
IPC 1-7
IPC 8 full level
B43L 7/027 (2006.01)
CPC (source: EP)
B43L 7/0275 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0065375 A1 19821124; EP 0065375 B1 19841128; DE 3261353 D1 19850110
DOCDB simple family (application)
EP 82302248 A 19820430; DE 3261353 T 19820430