Tachograph adapted to record the periods of rest of vehicle drivers working in alternation

Claim 1

IN A TACHOGRAPH FOR CHECKING THE OPERATION OF A VEHICLE BY AT LEAST TWO VEHICLE DRIVERS, IN COMBINATION, A MEMBER ROCKABLY DRIVEN A GIVEN AMPLITUDE OF RECIPROCATING MOVEMENT WHILE THE VEHICLE IS RUNNING, A RECORD MEDIU, ADVANCED CONTINUOUSLY FOR RECORDING THEREON ON DIFFERENT TRACKS MARKS INDICATIVE OF THE PERIODS OF OPERATION OF THE RESPECTIVE DRIVERS OF THE VEHICLE DURING RESPECTIVE GIVEN PERIODS OF TIME, RECORDING MEANS DRIVEN FROM SAID ROCKABLE MEMBER FOR RECORDING SAID MARKS ON SAID RECORD MEDIUM, AND ADJUSTING MEANS OPERABLE BY SAID DRIVERS TO VARIABLY ADJUST SAID RECORDING MEANS TO RESPECTIVE OPERATIVE POSITIONS FOR RECORDING ON RESPECTIVE ONES OF SAID DIFFERENT TRACKS WITHOUT CHANGING THE AMPLITUDE OF MOVEMENT OF SAID ROCKABLY DRIVEN MEMBER, SAID ADJUSTING MEANS COMPRISING A PIVOTED LEVER MOVABLE ANGULARLY TO TWO DIFFERENT, STATIONARY ANGULARLY SPACED POSITIONS, A PIVOT FIXED ON SAID LEVER FOR MOVEMENT THEREWITH TO SAID TWO DIFFERENT POSITIONS, SAID RECORDING MEANS COMPRISING ANOTHER LEVER MOUNTED PIVOTALLY ON SAID PIVOT ON THE FIRST-MENTIONED LEVER, A STYLUS ON SAID ANOTHER LEVER FOR MAKING SAID MARKS ON SAID RECORD MEDIUM DURING THE ADVANCEMENT THEREOF, MEANS MECHANICALLY CONNECTING SAID MEMBER TO SAID ANOTHER LEVER FOR IMPARTING MOVEMENT TO SAID ANOTHER LEVER FROM SAID MEMBER FOR MAKING SAID MARKS A WIDTH CORRESPONDING SUBSTANTIALLY TO THE AMPLITUDE OF RECIPROCATING MOVEMENT OF SAID MEMBER, AND PIVOT MEANS PIVOTALLY MOUNTING SAID MEMBER PIVOTALLY INDEPENDENT OF BOTH OF SAID LEVERS.