Input-output typewriter having double shift means

Claim 1

AN INPUT-OUTPUT TYPEWRITER COMPRISING: A PLURALITY OF LETTER KEYS, EACH BEING ASSIGNED WITH A FIRST-LETTER-POSITION LETTER, SECOND-LETTER-POSITION LETTER, AND A THIRD-LETTER-POSITION LETTER AND BEING ACCOMPANIED BY A FIRST-LETTER-POSITION ENCODING-MEMBER GROUP COMPLYING WITH A LETTER CODE COMBINATION ALLOTTED TO SAID FIRST-LETTER-POSITION LETTER ACCORDING TO A FIRST MANNER OF ALLOTTMENT AND A SECOND LETTER-POSITION ENCODING-MEMBER GROUP COMPLYING WITH A LETTER CODE COMBINATION ALLOTTED TO SAID SECOND-LETTER-POSITION LETTER ACCORDING TO A SECOND MANNER OF ALLOTMENT; EACH OF SAID LETTER KEYS AS IN ASSIGNED WITH A THIRDLETTER-POSITION LETTER TO WHICH A LETTER CODE COMBINATION IS ALLOTTED ACCORDING TO SAID FIRST MANNER OF ALLOTMENT, BEING ACCOMPANIED BY A FIRST-CODEFAMILY THIRD-LETTER-POSITION ENCODING MEMBER GROUP COMPLYING WITH THE LAST-MENTIONED LETTER CODE COMBINATION AND BY A FIRST CODE-FAMILY-SHIFT OPERATING MEMBER; EACH OF SAID LETTER KEYS AS IS ASSIGNED WITH A THIRDLETTER-POSITION LETTER TO WHICH A LETTER CODE COMBINATION IS ALLOTTED ACCORDING TO SAID SECOND MANNER OF ALLOTMENT, BEING ACCOMPAINED BY A SECONDCODE-FAMILY THIRD-LETTER-POSITION ENCODING-MEMBER GROUP COMPLYING WITH THE LAST-MENTIONED LETTER CODE COMBINATION AND BY A SECOND CODE-FAMILY-SHIFT OPERATING MEMBER; FIRST-LETTER-POSITION SHIFT-KEY MEANS FOR SHIFTING, WHEN TOUCHED, THE TYPEWRITER MECHANISM INTO A FIRST-LETER POSITION WHERE ALL OF THE FIRST-LETTER-POSITION ENCODING-MEMBER GROUPS ARE BROUGHT INTO COOPERATIVE RELATION WITH THE RESPECTIVE LETTER KEYS; SECOND-LETTER-POSITION SHIFT-KEY MEANS FOR SHIFTING, WHEN TOUCHED, SAID TYPEWRITER MECHANISM INTO A SECOND-LETTER POSITION WHERE ALL OF THE SECOND-LETTER POSITION ENCODING-MEMBER GROUPS ARE BROUGHT INTO COOPERATIVE RELATION WITH THE RESPECTIVE LETTER KEYS; THIRD-LETTER-POSITION SHIFT-KEY MEANS FOR SHIFTING, WHEN TOUCHED, SAID TYPEWRITER MECHANISM INTO A THIRD-LETTER-POSITION WHERE ALL OF THE THIRD-LETTER-POSITION ENCODING-MEMBER GROUPS ARE BROUGHT INTO COOPERATIVE RELATION WITH THE REPECTIVE LETTER KEYS AND WHERE ALL OF FIRST AND THE SECOND CODE-FAMILY-SHIFT OPERATING MEMBERS ARE BROUGHT INTO COOPERATIVE RELATION WITH THE RESPECTIVE ONES OF SAID LETTER KEYS; A CODE-FAMILY-SHIFT INDICATOR-ACTIVATOR, RESPONSIVE TO SAID FIRST-LETTER-POSITION AND SAID SECOND-LETTER-POSITION SHIFT-KEY MEANS AND TO SAID FIRST AND AAID SECOND CODE-FAMILY-SHIFT OPERATING MEMBERS AND CAPABLE OF BEING PUT INTO A FIRST-CODE-FAMILY POSITION, WHEN THE SAME IS NOT IN SUCH A CODE-FAMILY POSITION, BY A TOUCH GIVEN TO SAID FIRST-LETTER-POSITION SHIFT KEY MEANS AND BY SAID FIRST CODE-FAMILY-SHIFT OPERATING MEMBER ACTIVATED, WHILE SAID TYPEWRITER MECHANISM IS IN SAID THIRD-LETTER POSITION, BY A TOUCH GIVEN TO SUCH ONE OF SAID LETTER KEYS AS IS ACCOMPANIED THEREBY, AND BEING PUT INTO A SECOND-CODEFAMILY POSITION, IF THE SAME IS NOT IN SUCH A CODEFAMILY POSITION, BY A TOUCH GIVEN TO SAID SECONDLETTER-POSITION SHIFT-KEY MEANS AND BY SAID SECOND CODE-FAMILY-SHIFT OPERATING MEMBER ACTIVATED, WHILE SAID TYPEWRITER MECHANISM IS IN SAID THIRD-LETTER POSITION, BY A TOUCH GIVEN TO SUCH ONE OF SAID LETTER KEYS AS IS ACCOMPANIED THEREBY; AT LEAST ONE CODE CONTACT FOR PRODUCING SIGNAL IN SUCCESSION, EACH REPRESENTING ONE OF THE LETTER CODE COMBINATIONS, A FIRST-CODE-FAMILY SHIFT CODE COMBINATION FOR USE IN INDICATING THAT THE FOLLOWING AT LEAST ONE SIGNAL IS ONE REPRESENTING THE LETTER CODE COMBINATION ALLOTTED TO A LETTER ACCORDING TO SAID FIRST SHIFT CODE COMBINATION FOR USE IN INDICATING FAMILY SHIFT CODE COMBINATION FOR USE IN INDICATING THAT THE FOLLOWING AT LEAST ONE SIGNAL IS ONE REPRESENTING THE LETTER CODE COMBINATION ALLOTTED TO A LETTER ACCORDING TO SAID SECOND MANNER OF ALLOTMENT; A LETTER CODE-CONTACT ACTIVATOR, RESPONSIVE TO SAID CODEFAMILY-SHIFT INDICATOR-ACTIVATOR, FOR COUPLING, WHILE SAID CODE-FAMILY-SHIFT, INDICATOR-ACTIVATOR IS IN SAID FIRST-CODE-FAMILY POSITION, ALL SAID FIRST-LETTER-POSITION AND SAID FIRST-CODE-FAMILY THIRD-LETTER-POSITION ENCODING-MEMBER GROUPS WITH SAID CODE CONTACT, AND FOR COUPLING, WHILE SAID CODE-FAMILY-SHIFT INDICATORACTIVATOR IS IN SAID SECOND-CODE-FAMILY POSITION, ALL SAID SECOND-LETTER-POSITION AND SAID SECOND-CODE-FAMILY THIRD-LETTER-POSITION ENCODING-MEMBER GROUPS WITH SAID CODE CONTACT; A CODE-FAMILY CODE-CONTACT ACTIVATOR, RESPONSIVE TO CHANGE OF SAID CODE-FAMILY POSITION OF SAID CODE-FAMILY-SHIFT INDICATOR-ACTIVATOR, FOR CAUSING, WHEN SAID CODE-FAMILY-SHIFT INDICATOR-ACTIVATOR IS PUT INTO SAID FIRST-CODE-FAMILY POSITION, SAID CODE CONTACT TO PRODUCE THE SIGNAL REPRESENTING SAID FIRST-CODE-FAMILY SHIFT CODE COMBINATION, AND FOR CAUSING, WHEN SAID CODE-FAMILY-SHIFT INDICATOR-ACTIVATOR IS PUT INTO SAID SECOND-CODE-FAMILY POSITION, SAID CODE CONTACT TO PRODUCE THE SIGNAL REPRESENTING SAID SECOND-CODEFAMILY SHIFT CODE COMBINATION; AN ENCODER TRIGGER RESPONSIVE TO A TOUCH GIVEN TO ONE OF SAID LETTER KEYS WHILE SAID TYPEWRITER MECHANISM IS IN ONE OF SAID FIRST-LETTER AND SAID SECOND-LETTER POSITIONS, FOR MAKING THE CORRESPONDING ONE OF THE ACCOMPANYING FIRST-LETTER-POSITION AND SECOND-LETTERPOSITION ENCODING-MEMBER GROUPS ACTIVATE SAID CODE CONTACT THROUGH SAID LETTER CODE-CONTACT ACTIVATOR, THEREBY CAUSING SAID CODE CONTACT TO PRODUCE THE SIGNAL REPRESENTING THE DESIRED LETTER CODE COMBINATION; AND AN ENCODER-TRIGGER CONTROLLER, RESPONSIVE TO SAID THIRD-LETTER-POSITION SHIFT-KEY MEANS, FOR SUPPRESSING THE OPERATION OF SAID ENCODER TRIGGER IN CASE SAID TYPEWRITER MECHANISM IS IN SAID THIRD-LETTER POSITION; SAID FIRST AND SAID SECOND CODE-FAMILY-SHIFT OPERATING MEMBERS COOPERATING, IN CASE SAID TYPEWRITER MECHANISM IS IN SAID THIRD-LETTER-POSITION, WITH SAID CODEFAMILY-SHIFT INDICATOR-ACTIVATOR AND ALSO WITH SAID ENCODER-TRIGGR CONTROLLER, TO CAUSE SAID ENCODER-TRIGGER CONTROLLER TO TEMPORARILY PUT SAID ENCODER-TRIGGER INTO OPERATION WHEN A TOUCH IS GIVEN TO SUCH ONE OF SAID LETTER KEYS AS IS ACCOMPANIED BY THE THIRDLETTER-POSITION ENCODING-MEMBER GROUP OF THE SAME CODE FAMILY AS THE CODE-FAMILY POSITION OF SAID CODEFAMILY-SHIFT INDICATOR-ACTIVATOR, AND TO CHANGE THE CODE-FAMILY POSITION OF SAID CODE-FAMILY-SHIFT INDICATOR-ACTIVATOR AND THEREAFTER CAUSE SAID ENCODERTRIGGER CONTROLLER TO TEMPORARILY PUT SAID ENCODERTRIGGER INTO OPERATION WHEN A TOUCH IS GIVEN TO SUCH ONE OF SAID LETTER KEYS AS IT ACCOMPANIED BY SAID THIRD-LETTER-POSITION ENCODING-MEMBER GROUP OF THE CODE FAMILY DIFFERENT FROM THE CODE-FAMILY POSITION OF SAID CODE-FAMILY-SHIFT INDICATOR-ACTIVATOR.