Means to selectively activate separate recording channels

Claim 1

IN AN ALIGNMENT SYSTEM FOR ALIGNING RECORD MARKS ALONG PARALLEL RECORD AXES ACROSS A RELATIVELY MOVABLE MULTI-CHANNEL RECORD MEDIUM, SAID MARKS BEING IMPRESSED IN RESPONSE TO THE OCCURRENCE OF PRESCRIBED STARTING SIGNALS BY A PLURALITY OF ASSOCIATED RECORDING TRANSDUCER MEANS, SAID TRANSDUCER MEANS EACH BEING ADAPTED TO IMPRESS CERTAIN OF SAID MARKS ALONG A PRESCRIBED HEAD-AXIS IN RESPONSE TO RECEIPT OF ENABLING SIGNALS, SAID SYSTEM COMPRISING: RAMP PULSE GENERATING MEANS HAVING INPUT AND OUTPUT TERMINALS, AND RAMP PULSE GENERATING MEANS BEING ADAPTED TO EMIT REFERENCE PULSES IN RESPONSE TO APPLICATION OF SAID STARTING SIGNALS ON SAID INPUT TERMINAL, SAID REFERENCE PULSES HAVING VOLTAGE LEVELS WHICH INCREASE LINEARLY WITH TIME; AND A PLURALITY OF VOLTAGE-SENSITIVE SWITCHING MEANS, EACH BEING CONNECTED BETWEEN SAID OUTPUT TERMINAL AND ONE OF SAID TRANSDUCER MEANS AND ADAPTED TO IMPRESS SUCH ENABLING SIGNALS UPON SAID TRANSDUCER MEANS TO ENABLE THE LATTER, AT TIMES DETERMINED BY A PRESCRIBED VOLTAGE LEVEL OF SAID REFERENCE PULSES AND CORRESPONDING TO A PRESCRIBED DELAY-TIME TO PROVIDE MARKS WHICH ARE ALIGNED ALONG SAID RECORD AXES.