Printer

Claim 1

PRINTING MECHANISM COMPRISING THE COMBINATION OF A TYPE DRUM HAVING A CIRCUMFERENTIALLY EXTENDING COLUMN OF TYPE CHARACTERS, SAID TYPE CHARACTERS BEING ARRANGED IN A PROGRESSIVE SERIES, A PLURALITY OF IMPRESSION DEVICES ARRANGED CIRCUMFERENTIALLY OF SAID DRUM, MEANS FOR ADVANCING SAID DRUM PAST SAID IMPRESSION DEVICES, COUNTERS ASSOCIATED WITH RESPECTIVE ONES OF SAID IMPRESSION DEVICES, SAID COUNTERS BEING EFFECTIVE TO INDIVIDUALLY COUNT IMPULSES, SUCCESSIVE ONES OF SAID COUNTERS REGISTERING, IN THE DIRECTION OF ADVANCEMENT OF SAID DRUM AND AT ANY INSTANT PROGRESSIVELY HIGHER COUNTS IN ACCORDANCE WITH SAID SERIES, MEANS OPERABLE IN TIME WITH SAID DRUM FOR GENERATING AN IMPULSE AS AN INCIDENT TO ADVANCEMENT OF EACH SAID TYPE CHARACTER PAST EACH SAID IMPRESSION DEVICE, SAID LAST MENTIONED MEANS BEING OPERABLE TO APPLY AN IMPULSE TO ALL OF SAID COUNTERS, AND COMPARING DEVICES FOR COMPARING THE OUTPUTS OF SAID COUNTERS WITH SIGNALS REPRESENTING CHARACTERS TO BE PRINTED AND FOR ACTUATING RESPECTIVE ONES OF SAID IMPRESSION DEVICES IN RESPONSE TO MATCHES BETWEEN THE OUTPUTS OF SAID COUNTERS AND SAID SIGNALS.