Computer keyboard - releases unequivocal command when first key is pressed, releases second unequivocal command when second key is pressed, and releases third unequivocal command when both keys are pressed at same time

摘要

A section of the keyboard has ten keys (11,12,13,14,15,16,17,18,19,20) mounted on a support (1). When a key is pressed, a contact is closed. The keyboard is for right-handed people; for left-handed operators, the arrangement is changed to its mirror image. The alphanumeric keyboard and two keys can be reached by one finger, including the thumb, in case of each pair, without strain. The keys (11,12) are for the thumb, keys (13,14) for the index finger, keys (15,16) for the middle finger, keys (17,18) for the ring finger, and keys (19,20) for the little finger.