Noiseless typewriter

Claim 1

A RELATIVELY NOISELESS TYPEWRITING MACHINE COMPRISING A HOUSING FOR THE TYPE MECHANISM INCLUDING A TYPE BASKET AND OPERATING KEYS THEREFOR; SAID HOUSING INCLUDING A TRAY-LIKE SHELL HAVING A FIXED BOTTOM, SIDE-WALLS EXTENDING UPWARDLY FROM THE OPPOSITE ENDS OF SAID BOTTOM, A FRONT WALL AT THE FRONT OF SAID BOTTOM WALL BETWEEN SAID SIDE WALLS, AND A FIXED PARTIAL TOP WALL SLOPING UPWARDLY AND REARWARDLY FROM SAID FRONT WALL BETWEEN SAID SIDE-WALLS PROVIDED WITH APERTURES THROUGH WHICH EXTEND THE TERMINAL ENDS OF SAID OPERATING KEYS; A CARRIAGE ASSEMBLY INCLUDING A CYLINDRICAL PLATEN OVERLYING THE REAR PORTION OF SAID SHELL BEYOND SAID TYPE BASKET; COVER MEANS FOR SAID CARRIAGE ASSEMBLY AND TYPE BASKET COMPRISING A LIFTABLE COVER MOUNTED ON SAID SIDE WALLS HAVING THE FRONT EDGE THEREOF SPACED FROM AND OVERLYING THE REAR TERMINAL EDGE OF SAID FIXED PARTIAL TOP WALL, AND THE REAR EDGE OF SAID LIFTABLE COVER EXTENDING TO SAID CARRIAGE; A LIGHT SOURCE POSITIONED IN THE SPACE BETWEEN SAID FRONT EDGE OF SAID LIFTABLE COVER AND THE REAR PORTION OF SAID FIXED TOP WALL WHEREBY THE LIGHT THEREFROM IS THROWN FORWARDLY UPON THE BANK OF OPERATING KEYS AND REARWARDLY TO THE PORTION OF THE CYLINDRICAL PLATEN RECEIVING THE TYPE IMPRESSIONS; A MIRROR MOUNTED ON SAID LIFTABLE COVER FORWARDLY AND ABOVE SAID PORTION OF THE CYLINDRICAL PLATEN; A SECOND MIRROR MOUNTED ON SAID CARRIAGE ASSEMBLY ABOVE SAID PLATEN AND SPACED REARWARDLY A SLIGHT DISTANCE FROM SAID FIRST-MENTIONED MIRROR TO DEFINE A RELATIVELY NARROW OPTICAL GAP, SAID MIRRORS ADAPTED TO DIRECT THE LIGHT FROM SAID SOURCE, WHICH IS REFLECTED FROM SAID PORTION TO SAID FIRST MIRROR, TO THE EYES OF AN OPERATOR, WHILE MINIMIZING THE PASSAGE OF NOISE FROM THE TYPE BASKET AND PLATEN.