In 1974 , four engineers from Pilot Pen Corporation invent a " dustless chalkboard . " Their invention has become one of the most popular draught toy , with more than 40 million sell since its introduction . multitudinous children have enjoy playing and teach with it .
This wonderful innovation is theMagna Doodletm !
Toy Image Gallery
In this article , we will take a look inside this gripping miniature and see how it work out .
Inside a Magna Doodle
The Magna Doodle is essentially amagnetic drawing board . It has the follow pieces :
To put to work the Magna Doodle , you publish something on the airfoil with the magnetic pen . When you want to erase what you have written , slide the slew attractor to one side or the other ( it work in both counseling ) .
Now , let ’s see at the piece in more detail .
The Heart of It All
Themagnetophoretic video display panelis what makes the Magna Doodle unique .
This magnetic display has the next structure :
The walls of the middle , honeycombed wicket are less than 0.02 inches ( 0.5 mm ) thick . Each cell of the latticework is meet with a thickliquid suspensionordispersion mediumfilled withtiny magnetized particles . The fluent dispersion medium is designed so that the particles can be pulled through the liquid state in reaction to magnetic force apply by the pen or eraser , but they will not change their place ( float or cesspool ) due togravity . To do this , the liquid state has limited properties :
The center stratum is latticed so that there is always an even distribution of the magnetic atom across the intact surface of the display .
Now that we have seen the display , allow ’s look at the pen .
Magnetic Pen
The magnetic pen is simply a piece of plastic with a modest magnet in the tip . The arena of the magnetic pen is strong enough to riddle the plastic and perpetrate the particles through the deep liquid .
The magnetic pen is ergonomically styled so that anyone , especially slight children , can spellbind it comfortably . The playpen is commonly tie to the Magna Doodle by an attached strand . Some Magna Doodles also come with " shape tramper , " which are just magnets in pattern like diamond , triangle and circles .
Writing is but one enjoyment of the Magna Doodle . You must also be able to erase it , so have ’s count at the eraser .
Magnetic Eraser
The magnetic eraser consist of abar magnetin a formative slider .
The magnetized eraser sit in the back of the Magna Doodle behind the display , and it ca n’t be seen from the front . The eraser equip in a groove on the pillowcase that allows it to slide freely from one side to the other .
Now permit ’s bet at the concluding constituent : the case .
The Case
The plastic case holds everything together .
It has two pieces :
A front piece that :
A raised back bit that :
Now that we have seen each part , let ’s see how the Magna Doodle works !
In Action
Let ’s skid the charismatic eraser across the Magna Doodle and start with a clean display . The front of the display is blank ( white ) , and the back has all the particles . They were pulled to the back by the magnetic eraser .
If you search closer at each cell , you will see that the magnetized eraser has aline the corpuscle to one side !
Now , if you move the magnetic penitentiary along the display , the attractive feature on the pen pulls the tiny particles away from the back side to the front side , mould a line of merchandise . Note that the attraction pulls molecule from adjacent cells and aligns them in the centering of motion ( in this case , to the right ) .
Because the particle are lightsome and the liquified dispersion medium is boneheaded , gravity will not rip the particle forming the billet back to the other side . What is write will continue undisturbed .
To erase the showing , slip the magnetic eraser across the back of the presentation . As this is done , the charismatic eraser pull the particles take shape the lineage from the front side to the back side and aligns them in the direction of the motion . The heaviness of the liquid dispersion medium preclude them from floating to the surface , so the front side remain clean .
The Magna Doodle is a wonderful toy that allow youngster ( of all ages ) to draw and re - describe pictures and Word of God without scourge theme or creating chalk dust . When traveling in a gondola on a foresighted trip , one can draw for minute without make flock of folderol or having to focus pencil . Magna Doodles have been used by instructor to serve student practice writing and learn words . Magna Doodles have been used in some unexpected places , too :
There are many creative ways to habituate this rattling toy . For lot more selective information , check out the link on the next page .
