Detailed Information on Common Springs
COMPRESSION SPRINGS – These spring are used in many common applications where there is a need to move an object (Compress the coils) creating resistance so that when released the item will return to the original position. Some examples are ball point pens that you click to expose the point and then click again to retract the point. Automobiles use these springs in numerous places in the engine (Valve Springs) and suspension systems (Shock Absorbers)
EXTENSION SPRINGS – The Extension Springs moves in the opposite direction of the Compression Spring by pulling apart the coils using hooks or looped ends instead of compressing them. Probably the most familiar use is on each side of a garage door that are used in the opening and closing of the door.
TORSION SPRINGS – A Torsion Spring operates much differently with the coils rotating or twisting around the diameter of the spring with legs extending outward. Many kitchen cabinet doors employ this type of spring to make the door close by itself. Another common use is for parking lot exits where they warn you not to back up because of tire damage. The spikes used in those devices are many times actuated by Torsion Springs that allow the spikes to be pushed down by the tire exiting but spring back to prevent unauthorized entry.
DOUBLE TORSION SPRINGS – This spring is a Torsion spring with two sets of coils and performs the same function but uses two sets of coils separated by a straight wire section. Typical uses are ladies hair clips and clip boards used for writing.
CLOCK SPRINGS – Originally used as the power source for clocks and watches which have since gone electronic. These are used in applications such as motorcycle kick start systems.
CONICAL / TAPER SPRINGS – This spring operates like a Compression spring but because the coils are different diameters the resistance will increase the more it is compressed.
FLAT SPRINGS – These springs are made of metal strip as opposed to wire. They are used in many different spring applications where wire springs are not practical.
WIRE FORMS – Wire forms are shaped wire in a myriad of different configurations that may or may not perform a spring function. A common coat hanger and paperclip good examples of wire forms without a spring function.