Printing system having storage and blocking means

Claim 1

AN ELECTRONIC PRINTING SYSTEM COMPRISING IN COMBINATION A CONTINUOUSLY OPERABLE MOTOR, A TYPE WHEEL CONTINUOUSLY ROTATED BY SAID MOTOR HAVING A PLURALITY OF CHARACTER INDICIA ABOUT ITS CIRCUMFERENCE PRESENTED AT A FIXED RECORD LOCATION, WITH A ROTOR ARM COUPLED TO AND CONTINUOUSLY ROTATED WITH SAID PRINT WHEEL TO SCAN SEPARATE CHARACTER IDENTIFICATION SWITCH SECTIONS PRESENTED IN A FIXED TIMING RELATIONSHIP WITH EACH OF THE SECTORS OF THE TYPE WHEEL UPON WHICH THE CHARACTER INDICIA ARE PLACED, ELECTRONIC MEANS COUPLED TO THE ROTOR ARM FOR INITIATING A PRINT CYCLE WHEN THE SWITCH SECTIONS ARE ENCOUNTERED, ASYNCHRONOUS SWITCHING MEANS FOR EACH CHARACTER ENERGIZING A SINGLE ONE OF THE SWITCH SECTIONS RESPONSIVE TO A CHARACTER SELECTION OPERATION FOR A SINGLE PRESENTATION OF THE SELECTED CHARACTER BY SAID WHEEL, ELECTRONICALLY OPERATED IMPACT MEANS OPERABLE AS THE ROTOR ARM ENGAGES THE LATTER SAID SWITCH SECTION TO STRIKE THE SELECTED TYPE WHEEL CHARACTER, MEANS INTERPOSING A RECORDING MEDIUM BETWEEN THE IMPACT MEANS AND THE TYPE WHEEL TO RECORD THE CHARACTER, AND ELECTRONICALLY OPERATED ADVANCING MEANS TO ADVANCE THE RELATIVE POSITIONS OF THE RECORDING MEDIUM AND THE TYPE WHEEL SUBSEQUENT TO EACH IMPACT, AN ELECTRONIC TIMING GENERATOR TO PRODUCE SEPARATE SIGNALS DURING TWO SEQUENTIAL TIMING PERIODS DEFINING RESPECTIVELY THE IMPACT OPERATION PERIOD AND THE ADVANCING OPERATION PERIOD, MEANS OPERATING THE ADVANCING MEANS RESPONSIVE TO ITS SEQUENTIAL SIGNAL, WHEREIN THE MEANS FOR ENERGIZING THE SWITCH SECTIONS OPERATES MOMENTARILY AND IS THEREAFTER DISABLED BY MEANS OPERABLE FROM BOTH SAID SEPARATE SIGNALS THROUGHOUT THE REMAINDER OF BOTH SAID OPERATION PERIODS, WHEREIN THE MEANS ENERGIZING THE SWITCH SECTIONS IS A KEYBOARD WITH EACH KEY ON THE KEYBOARD COMPRISING A MANUALLY OPERATED SWITCH COUPLED IN REST POSITION TO CHARGE AN ACCOMPANYING CAPACITOR AND COUPLED IN OPERATED POSITION TO RELEASE THE CHARGE ON THE CAPACITOR THEREBY ACTUATING SAID IMPACT MEANS, MEANS RESPONSIVE TO THE KEY SWITCH OPERATION SERVING TO GENERATE A TIMING PULSE LASTING FOR THE DURATION OF THE PRINT CYCLE, AND MEANS RESPONSIVE TO THE TIMING PULSE PROVIDED FOR DISCHARGING THE KEYBOARD CAPACITORS, THEREBY PREVENTING OPERATION FOR A FURTHER PRINTING CYCLE PREMATURELY.