ClipArt ETC
"Through the center of the space draw the three construction lines, AB vertical, DE and FG at 30 degrees. Measure CA and CB 1 1/2" long. Draw AE, AF, DB and BG at 30 degrees. Complete hexagon by drawing DF and GE vertical. Set spacers to 3/32". Step off 3/32" on each side of the center lines, and 3/16" from each side of hexagon. Complete figure as shown with triangle against T-square." —French, 1911

Drawing Hexagonal Figure

"Through the center of the space draw the three construction lines, AB vertical, DE and FG at 30 degrees.…

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the nut and thumb screw arranged as shown; the movable swivel head being used the least." —Grimshaw, 1902

Adjustable Rectangular Head T Square

"Where the square has a fast and a loose head, the blade should be mortised into the fixed one and the…

A front and side view of a t square with rectangular head. The t square is used draw straight lines using the blade in mechanical drawing.

Fixed Rectangular Head T Square

A front and side view of a t square with rectangular head. The t square is used draw straight lines…

"To enable the drawing of long parallel, the head must have been a long contact surface with the edge of the board. It must also be wide enough to hold the blade stiffly." —Grimshaw, 1902

Fixed Triangular Head T Square

"To enable the drawing of long parallel, the head must have been a long contact surface with the edge…

"Where the head is movable, the pivot should be quit large, and the hole in which it plays be bushed with metal; the washers must be large, and the clamp screws of hard metal, with deep threads and unreliable." —Grimshaw, 1902

Taper Head Adjustable T Square Side and Front View

"Where the head is movable, the pivot should be quit large, and the hole in which it plays be bushed…

An adjustable T-square to create straight lines at different angles with a ruler attached to the head.

Adjustable Head T-square with Ruler

An adjustable T-square to create straight lines at different angles with a ruler attached to the head.

An adjustable T-square to create straight lines at different angles.

Adjustable Head T-square

An adjustable T-square to create straight lines at different angles.

An English T-square for drawing straight lines. The narrowing of the bottom blade makes the T-square look as if it is not perpendicular.

English T-square

An English T-square for drawing straight lines. The narrowing of the bottom blade makes the T-square…

A long fixed head T-square for drawing straight lines. The head shape of the T-square allows for drawing a long square.

Long Fixed Head T-square

A long fixed head T-square for drawing straight lines. The head shape of the T-square allows for drawing…

A regular fixed head T-square for drawing straight lines. The blade must be perfectly straight in order to draw accurate lines.

Regular Fixed Head T-square

A regular fixed head T-square for drawing straight lines. The blade must be perfectly straight in order…

A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.

Triangle Accuracy Test using T-square

A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.