the arrangement of keys with double and trippelfunktion on keyboards for the introduction of data for mechanical and electronic apparatus for calculations (calculators), treatment of data,graphics and calculus (computers), and the copy of data (typewriter).

摘要

The arrangement includes one or more buttons with reduced diameter and height greater than the key are placed near the key or in its upper part. The arrangement enables each key to be combined with the commands ALT and CTRL in order to function mechanically or electronically. By pressing on the buttons, the user can work with ALT and/or CTRL and at the same time the letter key which is required to be combined with ALT and CTRL. - This means that instead of pressing several keys, the user can with one and the sam key work with CTRL and ALT as required. For the keys SHIFT and TAB, either the keys with double function are used in such a way that on the key TAB is only the button for ALT and on the key SHIFT is only the button for CTRL or triple function is used on both keys.