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William Tell was known as an expert marksman with the crossbow. At the time, Habsburg emperors were seeking to dominate Uri. Hermann Gessler, the newly appointed Austrian Vogt of Altdorf raised a pole in the village's central square with his hat on top and demanded that all the local townsfolk bow before it. Tell passed without bowing, and was arrested. His punishment, being forced to shoot an apple off the head of his son, Walter, or else both would be executed. Tell had been promised freedom if he shot the apple. Tell split the fruit with a single bolt from his crossbow. When Gessler queried him about the purpose of the second bolt in his quiver, Tell answered that if he had ended up killing his son in that trial, he would have turned the crossbow on Gessler himself. Gessler became enraged at that comment, and had Tell bound and brought to his ship to be taken to his castle at Küssnacht. In a storm on Lake Lucerne, Tell managed to escape. He went to Küssnacht, and when Gessler arrived, Tell shot him. Tell's defiance of Gessler sparked a rebellion leading to the formation of the Swiss Confederation.

William Tell

William Tell was known as an expert marksman with the crossbow. At the time, Habsburg emperors were…

Square with dotted vertical, horizontal, and diagonal lines that are lines of symmetry.

Lines of Symmetry, Square With

Square with dotted vertical, horizontal, and diagonal lines that are lines of symmetry.

Square with dotted lines that are lines of symmetry.

Lines of Symmetry, Triangle With

Square with dotted lines that are lines of symmetry.

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 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 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 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.

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 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.

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square, triangle, scale, and protractor to save time in machine drawing and civil engineering work.

Universal Drafting Machine

The Universal Drafting Machine is used in a large drafting room. It combines the functions of T-square,…

T-squares is used on the left side of the board for righted handed people, and right side of the board for the left handed. One of the technique to adjust the T-square is to hold it with the fingers on the blade and the thumb on the board.

T-square Holding Position Using Fingers on Blade

T-squares is used on the left side of the board for righted handed people, and right side of the board…

When drawing vertical lines, the blade of the T-square is held with the thumb while the fingers adjusting the triangle.

Drawing Vertical Lines Using a T-square and a Triangle

When drawing vertical lines, the blade of the T-square is held with the thumb while the fingers adjusting…

Parallel lines are drawn by holding the triangle against the T-square at an angle, or another triangle, then slip the first triangle onto the required position.

Drawing Parallel Lines Using T-square and Triangle

Parallel lines are drawn by holding the triangle against the T-square at an angle, or another triangle,…

Perpendicular lines are drawn by fitting the hypothenuse of the triangle to the T-square at an angle, or another triangle. Then, turn the triangle so that the hypothenuse is perpendicular to the line.

Drawing Perpendicular Lines Using T-square and Triangle

Perpendicular lines are drawn by fitting the hypothenuse of the triangle to the T-square at an angle,…

"Through the center of the space draw a horizontal and a vertical line, measuring on these lines as diameters lay off a three-inch square. Along the lower side and the upper half of the left side measure 3/8' spaces with the scale. Draw all horizontal lines with the T-square and all vertical lines with the T-square and triangle." —French, 1911

Drawing Exercise for T-square, Triangle, and Scale

"Through the center of the space draw a horizontal and a vertical line, measuring on these lines as…

"Draw three-inch square. Draw lines AB, BC, DE and EF at 30 degrees. Divide lower side into seven equal parts with the dividers. Draw the vertical lines, and mark divisions on AC with pencil as each line is drawn. Through the division points on top and bottom draw the converging lines using the triangle alone as a straight-edge." —French, 1911

Drawing Converging Lines

"Draw three-inch square. Draw lines AB, BC, DE and EF at 30 degrees. Divide lower side into seven equal…

"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.…

"An exercise in starting and stopping short lines. Draw three-inch square. Draw diagonals with 45-degree triangle. With scale lay off 3/8" spaces along the diagonals, from their intersection. With 45-degree triangle complete figure, finishing one-quarter at a time." —French, 1911

Drawing Street Paving Intersection

"An exercise in starting and stopping short lines. Draw three-inch square. Draw diagonals with 45-degree…

"Draw three-inch square and one-inch square. From the corners of inner square draw lines to outer square at 15 degrees and 75 degrees, with the two triangles in combination. Mark points with spacers 3/16" inside of each line of this outside cross, and complete figure with triangles in combination." —French, 1911

Drawing Maltese Cross using T-square, Spacers, and Triangles

"Draw three-inch square and one-inch square. From the corners of inner square draw lines to outer square…

"Draw one and one-half inch square about center of space. Divide AE into four 3/16" spaces, with scale. With bow pencil and centers A, B, C, D draw four semicircles with 3/8" radius and so on. Complete the figure by drawing the horizontal and vertical tangents as shown." —French, 1911

Drawing Tangent to Circle Arcs with Bow Compass

"Draw one and one-half inch square about center of space. Divide AE into four 3/16" spaces, with scale.…

"Draw the diagonals of the square. With the corners of the square as centers and radius of half the diagonal draw arcs intersecting the sides of the square and connect these points." —French, 1911

Inscribe Regular Octagon in Given Square

"Draw the diagonals of the square. With the corners of the square as centers and radius of half the…

A T-square is a technical drawing instrument, primarily a guide for drawing horizontal lines on a drafting table. It is used by draftsmen. It is also used to guide the triangle that draws the vertical lines.

Architects Drafting Square

A T-square is a technical drawing instrument, primarily a guide for drawing horizontal lines on a drafting…

Oil stoves are able to deliver enough heat for a 3000 square foot home and with burn rates as low as 1/16 gallon per hour for smaller homes it can be a very efficient way to heat. Super clean blue flame burn technology actually vaporizes the fuel and burns at efficiencies of up to 81 percent. They burn soot free, smoke free, smell free and provide an even steady heat for your home.

Oil Stove

Oil stoves are able to deliver enough heat for a 3000 square foot home and with burn rates as low as…

The lag screw is used in fastening heavy timbers with a square or hexagonal head.

Lag Screw

The lag screw is used in fastening heavy timbers with a square or hexagonal head.

Carriage bolt is a fastener with a round head with a square head, and tightened by using a nut and wrench. The bolt is commonly used in furniture making.

Carriage Bolt

Carriage bolt is a fastener with a round head with a square head, and tightened by using a nut and wrench.…

This is an illustration of a baseball game. Baseball is played on a large field that has four bases laid out in a square, positioned like a diamond, whose outlines mark the course a runner must take to score. Teams alternate positions as batters and fielders, exchanging places when three members of the batting team are put out. Batters try to hit a pitched ball out of reach of the fielding team and complete a circuit around the bases in order to score a run.

Baseball Game Illustration

This is an illustration of a baseball game. Baseball is played on a large field that has four bases…

Bevel, is a and tool consisting of two rules that are hinged together so you can draw or measure angles of any size. A sliding T bevel is an adjustable gauge for setting and transferring angles. The handle is usually made of wood or plastic and is connected to a metal blade with a thumbscrew or wing nut.

Bevel Square

Bevel, is a and tool consisting of two rules that are hinged together so you can draw or measure angles…

T—squares can be temporarily adjusted by putting the thumb tack in the head as illustrated. This is used when the previous work does not align with the T-square.

Temporary Adjustment T-square

T—squares can be temporarily adjusted by putting the thumb tack in the head as illustrated. This…

A Gothic diaper ornament during the fourteenth century. A diaper ornament is a carved or painted surface of square shapes containing flowers or simple figures.

Gothic Architecture Diaper Ornament

A Gothic diaper ornament during the fourteenth century. A diaper ornament is a carved or painted surface…

A square threaded tap or screw with three equal lengthed thickness. The stepped tap is used to fasten two materials together with unthreaded top.

Stepped Threaded Tap

A square threaded tap or screw with three equal lengthed thickness. The stepped tap is used to fasten…

"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…

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 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…

"The mortar is a stout cannon of forged steel with simple vent firing and rear trunnions. The maximum pressure with the heaviest bomb is 16 tons to the square inch." —Encyclopeadia Britannica, 1922

Mounted Steel Mortar

"The mortar is a stout cannon of forged steel with simple vent firing and rear trunnions. The maximum…

A rectangular cube drawn by using oblique projection. The original cube was projected parallel at a certain angle. The cube was drawn by drawing the front square in the front, then projecting it in an angle while connecting the edges.

Oblique Projection of a Rectangular Cube

A rectangular cube drawn by using oblique projection. The original cube was projected parallel at a…

The illustration of constructing a circle or ellipse using isometric drawing. The inscribed circle is transferred to the top part of the cube by creating diagonal lines through the center and series of squares.

Isometric Drawing of Circle using Square

The illustration of constructing a circle or ellipse using isometric drawing. The inscribed circle is…

The illustration of the side view of the oblique timber inserted into the horizontal timber. The drawing is done by drawing the square base, then draw an angled parallel line from the base.

Side View of Oblique Timber Framed in to Horizontal Timber

The illustration of the side view of the oblique timber inserted into the horizontal timber. The drawing…

A close up of a square thread on a screw. This representation shows the correct an accurate three dimensional view of the screw.

Square Thread Screw

A close up of a square thread on a screw. This representation shows the correct an accurate three dimensional…

Illustration of a common representation for square thread screw. The screw is drawn in two dimensions and used in drafting plans and mechanical drawing.

Square Thread Screw Mechanical Drawing Representation

Illustration of a common representation for square thread screw. The screw is drawn in two dimensions…

A representation of the square threaded nut and screw. The left image shows the threaded screw with a continuous helix drawn. The nut is cut in half to show how the threads are drawn with respect to the screw.

Diagram of Square Thread Nut and Screw

A representation of the square threaded nut and screw. The left image shows the threaded screw with…

A representation of the square threaded nut and screw. The left image shows the threaded screw with a continuous helix drawn. The nut is cut in half to show how the threads are drawn with respect to the screw.

Diagram of Square Thread Nut and Screw

A representation of the square threaded nut and screw. The left image shows the threaded screw with…

A problem exercise using a t square and 45 degree triangle to divide the paper into half inch squares. Then, divide the squares with diagonal lines both sides of the paper.

Squares Diagonal Lines Repeating Patterns

A problem exercise using a t square and 45 degree triangle to divide the paper into half inch squares.…

"Divide the square as indicated by the dotted lines, drawing these as full lines in pencil, but do not ink them...The intermediate or section lines must not be drawn with a pencil, but are to be drawn only in ink, the spacing being done by the eye." —Anthony, 1904

Constructing Stars Using Different Shapes

"Divide the square as indicated by the dotted lines, drawing these as full lines in pencil, but do not…

A problem exercise to creating a star using series of triangles and squares. The image is divided by the dotted line to scale images to appropriate size.

Star Construction Using Triangles and Squares

A problem exercise to creating a star using series of triangles and squares. The image is divided by…

"Use the T square and 45 degree triangle to divide the square as indicated, the size of the small squares being ½". This is an excellent test of precision in measurement and lining. Care must be observed in the inking of this figure to allow each line to dry before inking the next one." —Anthony, 1904

Drawing Diagonal Lines with T Squares and Triangle

"Use the T square and 45 degree triangle to divide the square as indicated, the size of the small squares…

A diagonal line pattern drawing exercise in for T square and triangle. The image is constructed by dividing the paper into squares with the T square, and the diagonal lines are drawn using a 45 degree triangle.

Drawing Exercise for Drawing Diagonal Line Pattern using T Square and Triangle

A diagonal line pattern drawing exercise in for T square and triangle. The image is constructed by dividing…

The construction of a star with square overlapping each other using a triangle and T square. This image is drawn by dividing the paper with dashed lines using T square. Using the 45 degree triangle, draw diagonal lines to create the star and the star.

Constructing Star and Box Overlap Pattern using T Square and Triangle

The construction of a star with square overlapping each other using a triangle and T square. This image…

A problem exercise to construct a star overlapping square using a triangle and T square. The image is drawn by dividing the paper with dashed lines using T square. Using the 45 degree triangle, draw diagonal lines to create the star and the star.

Constructing 4 Point Star Overlapping Box Pattern using T Square and Triangle

A problem exercise to construct a star overlapping square using a triangle and T square. The image is…

An exercise problem drawing a series of horizontal lines using a straight edge or triangle without using a T square.

Horizontal Solid Line Drawing Exercise

An exercise problem drawing a series of horizontal lines using a straight edge or triangle without using…

An exercise for mechanical drawing to construct a series of horizontal lines. The solid lines are drawn without using a T square, while the dashed lines are produced using a T square.

Horizontal Solid and Dashed Line Drawing Exercise

An exercise for mechanical drawing to construct a series of horizontal lines. The solid lines are drawn…

This folding square is also known as a t-square which is a technical instrument, primarily a guide for drawing horizontal lines on a drafting table.

Folding Square

This folding square is also known as a t-square which is a technical instrument, primarily a guide for…

"With a 45 degree triangle draw lines AC and BD through the center and construct three squares. Set the bow—pencil to a radius of 3∕8' and describe a circular arc in the corner of each square just touching, but not intersecting, the sides of the square. Ink the circular arcs first." —Anthony, 1904

Mechanical Drawing Exercise Three Inscribed Squares with Rounded Corners using Triangle and Bow

"With a 45 degree triangle draw lines AC and BD through the center and construct three squares. Set…

An exercise to shade small circles with bow pen for mechanical drawing. The paper is first divided into 4" square. At each corners, draw a 3&fras;8" diameter. The shading is done by reducing and increasing the pressure of the bow while drawing the circle.

Mechanical Drawing Exercise Shading Sides of Small Circles with Bow Pen

An exercise to shade small circles with bow pen for mechanical drawing. The paper is first divided into…

This is an architectural tool, which facilitates the use of drawing straight lines and right angles, similar to modern T-squares.

Drafting Appliance

This is an architectural tool, which facilitates the use of drawing straight lines and right angles,…

A try-square is a woodworking or a metal working tool used for marking and measuring a piece of wood

Woodworking Square

A try-square is a woodworking or a metal working tool used for marking and measuring a piece of wood

A T-shaped or L-shaped instrument for drawing or testing right angles.

Folding Square

A T-shaped or L-shaped instrument for drawing or testing right angles.

The illustration of a square heptagram star with six points. A heptagon polygon can make two stars.

Six Point Squared Heptagram Star

The illustration of a square heptagram star with six points. A heptagon polygon can make two stars.

A sailing vessel having three or more square-rigged masts.

Stranded Ship

A sailing vessel having three or more square-rigged masts.

A T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along the edge of the drawing board as a guide to the perpendicular longer section in making parallel lines, right angles, etc., and as a support for triangles.

Adjustable Drafting T-Square

A T-shaped ruler, used primarily in mechanical drawing, having a short crosspiece that slides along…