ralph benjamin developed the first model of a ball mouse.
ralph benjamin developed the first model of a ball mouse.
who developed the first model of a ball mouse?
ralph benjamin
section::::types.









































section::::types.:mechanical mice.









































the german company telefunken published on their early ball mouse on 2 october 1968. telefunken's mouse was sold as optional equipment for their computer systems. bill english, builder of engelbart's original mouse, created a ball mouse in 1972 while working for xerox parc.
computer mouse
a mouse moves the graphical pointer by being slid across a smooth surface. the conventional roller-ball mouse uses a ball to create this action: the ball is in contact with two small shafts that are set at right angles to each other. as the ball moves these shafts rotate, and the rotation is measured by sensors within the mouse. the distance and direction information from the sensors is then transmitted to the computer, and the computer moves the graphical pointer on the screen by following the movements of the mouse. another common mouse is the optical mouse. this device is very similar to the conventional mouse but uses visible or infrared light instead of a roller-ball to detect the changes in position.
pointing device