Method of obtaining a second function from keys on a keyboard using pressure differentiation

A method of obtaining a second function from keys on a keyboard that have momentarily depressed switches for invoking only a first function when struck individually, said method comprising the steps of:

• a) coupling a force sensing device to a momentarily depressed switch operably associated with a key on the keyboard;
• b) detecting, by the force sensing device, the force applied by the user on the key of the keyboard during a first period of time;
• c) detecting, by the force sensing device, the force applied by the user on the key during a second period of time;
• d) subtracting the force applied by the user on the key during the first period of time from the force applied by the user on the key during the second period of time to determine a key force threshold delta:
• e) adding the key force threshold delta to the force applied by the user on the key during the first period of time to determine a normal level of force applied by the user to the key;
• f) selecting a second function actuating force which is greater than the normal force applied by the user by a predetermined mount for the key;
• g) determining if the force applied by the user during a third period of time is greater than the second function actuating force;
• h) musing a machine associated with said keyboard to perform said first function when the key is struck with force which is less than said second function actuating force and perform said second function when the key is struck with force which is greater than said second function actuating force;
• and
• i) repeating steps a) through h) for each key on the keyboard.