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Family: Furniture

1.Construction Structure

Surface of leather or rubber and full water in it.

Four sticks and 1 plank.

A metal handle which can be rotated

Inclined fan blade and frame

Metallic frame and cushion

2.Materials

Rubber, leather

Wood, metal

Wood, metal

Plastic, metal(stainless steel)

Frame: metal(stainless steel) Cushion: cotton, leather

3.Functions

The average stress

Use four sticks with long length to support a plank to make it stable.

The principle is leverage. Forced to drive through the handle inside the cylinder, to move it to open the lock

Make the flabellum move throughout electricity. Then make the air flow because of the run of different direction of flabellum.

The stability of a triangle and quadrilateral instability


â&#x20AC;˘ References: About.com 2013, About, viewed 14th August 2013 < http://inventors.about.com/library/inventors/blscissors.htm> MrX 2004, Chrome Vanadium Adjustable Wrench, photograph, viewed 14th August 2013, http://upload.wikimedia.org/wikipedia/en/thumb/9/98/Chrome_Vana dium_Adjustable_Wrench.jpg/753pxChrome_Vanadium_Adjustable_Wrench.jpg Winepros Archive 2013, Winepros Archive, viewed 14th August 2013 <http://www.winepros.com.au/jsp/cda/reference/oxford_entry.jsp?ent ry_id=827>


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