Indexing mechanism

Claim 1

AN INDEXING MECHANISM COMPRISING A GEAR REDUCER, A DRIVING SHAFT EXTENDING FROM SAID GEAR REDUCER, MEANS FOR COUPLING SAID SHAFT WITH AN INDEXING SHAFT OF A MACHINE FOR DRIVING A COMPONENT CARRIED THEREBY, A VARIABLE SPEED MOTOR, A MOTOR SHAFT DRIVEN BY SAID MOTOR AND CONNECTED TO SAID GEAR REDUCER TO DRIVE SAID DRIVING SHAFT, AN ELECTRICALLY-OPERATED BRAKE EFFECTIVE TO STOP ROTATION OF SAID MAOTOR SHAFT, A COUNTER INCLUDING AT LEAST THREE DISCS FOR INDICATING AT LEAST UNITS, TENS AND HUNDREDS DIGITS, MEANS CONNECTING SAID DISCS TO SAID MOTOR SHAFT FOR ROTATING SAID DISCS IN RESPONSE TO THE ROTATION OF SAID SHAFT, SAID DISCS HAVING NOTCHES THEREIN LOCATED TO BE IN ALIGNMENT WHEN ALL OF SAID DISCS READ ZERO, A BAR LYING ADJACENT AND URGED TOWARD ALL OF SAID DISCS EXCEPT ONE INDICATING UNITS DIGITS AND ONE INDICATING TENS DIGITS, A SWITCH OPERATED BY SAID BAR AND RESPONSIVE TO THE POSITION OF SAID BAR FOR REDUCING THE SPEED OF SAID MOTOR WHEN SAID BAR IS IN THE NOTCHES OF ITS ASSOCIATED DISCS, A SECOND BAR LYING ADJACENT AND URGED TOWARD THE LATTER TWO DISCS INDICATING THE UNITS AND TENS DIGITS, A SECOND SWITCH OPERATED BY SAID SECOND BAR AND RESPONSIVE TO THE POSITION OF SAID SECOND BAR FOR ACTUATING SAID BRAKE TO STOP SAID MOTOR WHEN SAID SECOND MEMBER IS IN ITS ASSOCIATED NOTCHES, AND MEANS EXTENDING BETWEEN SAID BARS FOR PREVENTING SAID SECOND BAR FROM MOVING INTO ITS ASSOCIATED NOTCHES UNTIL SAID FIRST BAR IS IN ITS ASSOCIATED NOTCHES.