Hammer Drill

How does the hammer action work on a hammer drill?
Its part of a report for collage.
I know its something to do with a ball bearing & a spring, but I dont know it detailed enough.
here is an explanation with pictures:
http://www.right-drill.com/
Hammer drill basics Harbor Freight anchor bolt
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Ames True Temper 1196400 3-Pound Hand Drill Hammer with 10-1/2-Inch Hickory Handle $12.40 The Ames True Temper hand drill hammer gives you easily hefted, repeatable slam power with a 3-pound head weight. This drill hammer is made from drop forged carbon steel and a 10-1/2-inch long handle made of the highest grade hickory for rugged durability and dependability…. |
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ABC Products – All-Purpose ~ Hobby Knife Blade Set (56 Piece Of All Sizes) $19.27 Includes: 41 blades, 7 metal handles, 1 PVC handle, 6 scribes, 1 stone, and a molded PVC case ~~ Each blade, handle, and stone also has it’s own recessed holding place ~~ There is a blade for all your needs ~~ Cut, scratch, etch, scrape, layout, and make models…. |
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ABC Products – Empire ~ 9-Inch Heavy-duty Magnetic Aluminum Torpedo Level (True Blue) $11.87 Vials read plumb, level and 45 degrees ~~ True Blue Vial – superior accuracy, durability, visibility ~~ Heavy-duty extruded aluminum frame ~~ Strong-holding magnetic edge ~~ Vials read plumb, level and 45 degrees…. |
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Maxam 101pc Metric Tool Set $52.95 Maxam 101pc Metric Tool Set. Comes in blowmolded case measuring 273/4″ x 151/2″. Lifetime warranty. 6200PT $106.95 Item #MT101… |
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Chisel Drill Hammer $1.00 … |
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Chisel Drill Hammer [Vinyl] $9.48 … |