Fluid actuated typewriter

Claim 1

IN A TYPEWRITER OF THE TYPE IN WHICH A PLURALITY OF PRINT ELEMENTS ARE LOCATED AT FIXED POSITION ABOUT THE PERIMETER OF A ROTATABLE TYPE WHEEL AND WHERE SAID PRINT ELEMENTS ARE SELECTIVELY BROUGHT INTO ENGAGEMENT WITH A PRINTING MEDIUM AT A PRINTING STATION WHEN THE SELECTED PRINT ELEMENT IS ROTATED INTO A PRINTING POSITION, THE COMBINATION COMPRISING: A FLUID AMPLIFIER ASSOCIATED WITH EACH PRINT ELEMENT, EACH OF SAID FLUID AMPLIFIERS HAVING AN INPUT CHANNEL, FIRST AND SECOND OUTPUT CHANNELS, AND A CONTROL CHANNEL, AND WHEREIN SAID FLUID NORMALLY FLOWS FROM SAID INPUT CHANNEL TO SAID FIRST OUTPUT CHANNEL; CONTROL MEANS ASSOCIATED WITH EACH OF SAID FLUID AMPLIFIERS FOR SELECTIVELY CONTROLLING PRESSURE IN THE CORRESPONDING CONTROL CHANNEL SO THAT FLUID FLOW FROM SAID INPUT CHANNEL IS SELECTIVELY DIRECTED INTO SAID SECOND OUTPUT CHANNEL; PRINT ACTUATION MEANS; TIMING MEANS FOR DETECTING THE SIMULTANEOUS OCCURRENCE OF: FLUID FLOW IN A SELECTED SECOND OUTPUT CHANNEL, AND THE PRESENCE OF THE RELATED PRINT ELEMENT IN SAID PRINTING POSITION, SAID TIMING MEANS BEING OPERATIVE TO GENERATE A SIGNAL INDICATION OF EACH SAID SIMULTANEOUS OCCURRENCE; AND SAID PRINT ACTUATION MEANS BEING OPERATIVE IN RESPONSE TO THE SIGNALS GENERATED BY SAID TIMING MEANS TO MOVE SAID ROTATABLE TYPE WHEEL TO SAID PRINT STATION WHEREBY THE PRINT ELEMENT ASSOCIATED WITH A SELECTED CONTROL MEANS IS BROUGHT INTO ENGAGEMENT WITH SAID PRINTING MEDIUM.