Memory drum for coin operated record player

Claim 1

A MECHANICAL MEMORY DRUM COMPRISING A HOLLOW CYLINDRICAL HOUSING, A PLURALITY OF ROWS OF CAMS ARRANGED ON SAID CYLINDER, EACH OF SAID ROWS INCLUDING A PLURALITY OF SELECTIVELY MOVABLE CAMS EXTENDING CIRCUMFERENTIALLY ABOUT SAID CYLINDER, SAID CAMS BEING ALIGNED ALONG THE LENGTH OF SAID CYLINDER TO FORM PARALLEL FILES, EACH OF SAID CAMS HAVING A FIRST ARCUATE PORTION TERMINALLY AND PIVOTALLY CONNECTED TO THE OUTER SURFACE OF SAID CYLINDRICAL HOUSING, SLOTS IN SAID CYLINDRICAL HOUSING SPACED FROM SAID PIVOTAL CONNECTION, A SECOND ARCUATE PORTION FIXED TO SAID FIRST ARCUATE PORTION AND EXTENDING INTO THE INTERIOR OF SAID CYLINDRICAL HOUSING THROUGH SAID SLOTS, SAID SECOND ARCUATE PORTION HAVING ITS ENDS BENT TOWARD SAID CYLINDRICAL HOUSING RELATIVE TO ITS CENTER FOR FRICTIONALLY ENGAGING SAID HOUSING WHEREBY SAID CAM MAY BE SELECTIVELY FRICTIONALLY HELD IN EITHER OF TWO POSITIONS, MEANS CARRIED INSIDE SAID DRUM FOR PIVOTING SELECTIVE CAMS, SAID MEANS INCLUDING A SERIES OF SOLENOIDS, SAID SOLENOIDS BEING ALIGNED WITH SAID CIRCUMFERNTIAL CAM ROWS, EACH OF SAID SOLENOIDS INCLUDING A MOVABLE ARMATURE FOR PIVOTING SAID CAMS, A SHAFT CONCENTRICALLY POSITIONED WITHIN SAID CYLINDRICAL HOUSING AND ADAPTED TO ROTATE WITH RESPECT THERETO, SAID SERIES OF SOLENOIDS FIXEDLY CARRIED BY SAID SHAFT WHEREBY SAID SOLENOIDS MAY BE POSITIONED ADJACENT A PARTICULAR FILE OF CAMS, A CIRCUMFERENTIAL ROW OF RIGID PINS CARRIED BY SAID CYLINDRICAL HOUSING AND EXTENDING ON EITHER SIDE OF THE SURFACE THEREOF, A PAWL CARRIED BY SAID SHAFT AND ENGAGEABLE WITH SAID PINS FOR PREVENTING RELATIVE ROTATION