Typewriter comprising improved keyboard and associated printing means

Claim 1

A TYPE-WRITING MACHINE COMPRISING A MOVABLE SYMBOL HOLDER MEANS COMPRISING A DISC WITH A PLURALITY OF SYMBOLS ON IT FOR PRINTING AN INDIVIDUAL SYMBOL ON A PAPER, STOPPING MEANS FOR STOPPING THE SYMBOL ON THE HOLDER MEANS TO BE PRINTED ON THE PAPER AT A PREDETERMINED POSITION, SELECTOR COMPONENT MEANS FOR SELECTING THE SYMBOL TO BE PRINTED, AND KEY MEANS COMPRISING A PLURALITY OF FINGER KEYS FOR OPERATING SAID SELECTOR MEANS TO SELECT A PREDETERMINED SYMBOL AND FOR OPERATING SAID STOPPING MEANS TO MOVE THE SYMBOL HOLDER MEANS TO A PREDETERMINED POSITION, SAID STOPPING MEANS INCLUDING STOPPING ELEMENTS, SAID HOLDER MEANS COMPRISING A LEVER WHICH ABUTS AGAINST SAID ELEMENTS, ROTATION MEANS COMPRISING A CAM AND A GEAR SECTOR, SAID CAM CAUSING THE GEAR SECTOR TO TURN IN ONE DIRECTION, SAID SECTOR BEING PULLED IN AN OPPOSITE DIRECTION BY A SPRING, A PINION WHICH IS GEARED WITH SAID SECTOR BEING CONNECTED TO SAID DISC BY A UNIDIRECTIONAL CLUTCH SO AS TO TRANSMIT MOTION TO SAID DISC ONLY WHEN THE PINION IS DRIVEN BY SAID SPRING.