Sensing unit with printed circuit

Claim 1

A CARD SENSING UNIT COMPRISING AN ELONGATED CONDUCTIVE MEMBER CONNECTED TO A SOURCE OF ELECTRICAL POTENTIAL AND ACTING TO SUPPORT A MOVING CARD, A PRINTED CIRCUIT BOARD STATIONARILY POSITIONED ADJACENT SAID ELONGATED CONDUCTIVE MEMBER AND CARRYING A PLURALITY OF SPACED, INSULATED, STATIONARY CONDUCTIVE PORTIONS, AN ELONGATED INSULATING BRUSH SUPPORT MEMBER, A PLURALITY OF INDIVIDUAL, SPACED, CONDUCTIVE BRUSH ELEMENTS MOUNTED ON OPPOSING SIDES OF SAID ELONGATED SUPPORT MEMBER AT RIGHT ANGLES TO THE AXIS THEREOF WITH THEIR FREE ENDS EXTENDING AWAY FROM SAID SUPPORT MEMBER IN OPPOSITE DIRECTIONS, MEANS FOR ELECTRICALLY CONNECTING ALIGNED OPPOSED CONDUCTIVE ELEMENTS ON SAID SUPPORT MEMBER, STATIONARY SUPPORT MEANS FOR MOUNTING SAID ELONGATED BRUSH SUPPORT MEMBER BETWEEN SAID ELONGATED CONDUCTIVE MEMBER AND SAID STATIONARY PRINTED CIRCUIT CONDUCTIVE PORTION, MEANS FOR ROTATING SAID ELONGATED BRUSH SUPPORT MEMBER ON SAID MOUNTING MEANS WHEREBY SAID FREE ENDS OF SAID OPPOSITELY POSITIONED BRUSH ELEMENTS ON SAID SUPPORT MEMBER MAY BE MOVED INTO AND OUT OF CONTACT WITH SAID ELONGATED CYLINDRICAL CONDUCTIVE MEMBER AND ASSOCIATED CONDICTIVE PORTIONS OF SAID PRINTED CIRCUIT BOARD, AND MEANS ALLOWING SAID ELONGATED BRUSH SUPPORT MEMBER TO BE SLID AXIALLY AWAY FROM SAID UNIT ON AN AXIS GENERALLY PARALLEL TO THE AXIS OF SAID ELONGATED CONDUCTIVE MEMBER AFTER SAID BRUSH ELEMENTS HAVE BEEN ROTATED FROM A CONTACTING POSITION TO A NONCONTACTING POSITION SO THAT SAID BRUSH SUPPORT MEMBER MAY BE EASSILY REMOVED FROM SAID UNIT.