Tripping mechanism for record changer

Abstract

Abstract 1. ACTUATING MEANS FOR THE TONE ARM SET-DOWN CONTROL MECHANISM OF A RECORD PLAYER COMPRISING A DRIVE GEAR TO ROTATE WITH THE TURNTABLE OF A RECORD PLAYER, A DRIVE PROJECTION ROTATABLE WITH THE DRIVE GEAR AND A ROTATABLE CAM GEAR TO BE OPERATIVELY CONNECTED TO THE TONE ARM SET-DOWN CONTROL MECHANISM OF THE RECORD PLAYER, THE TEETH OF THE DRIVE GEAR MESHING WITH THE TEETH OF THE CAM GEAR TO EFFECT A ROTATIONAL CYCLE OF THE CAM GEAR, THE CAM GEAR HAVING A NOTCH IN ITS PERIPHERAL EDGE SUCH THAT THE PERIPHERAL EXTENT OF ITS TEETH IS LESS THAN THE FULL PERIPHERY OF THE CAM GEAR TO ESTABLISH NONENGAGEMENT BETWEEN THE DRIVE AND CAM GEARS WHEN THE NOTCH IS DISPOSED OPPOSITE THE DRIVE GEAR, AND TRIP MEANS CARRIED BY THE CAM GEAR AND SELECTIVELY MOVABLE INTO THE PATH OF THE LEADING EDGE OF THE DRIVE PROJECTION SUCH THAT ROTATION OF THE DRIVE PROJECTION MOVES THE CAM GEAR FAR ENOUGH TO RELOCATE THE NOTCH AND INITIATE DRIVING ENGAGEMENT BETWEEN THE TEETH OF THE DRIVE AND CAM GEARS TO EFFECT SAID ROTATIONAL CYCLE OF THE CAM GEAR, THE IMPROVEMENT WHEREIN THE PITCH OF THE CAM GEAR TEETH IS 1/1+1+XY C, C BEING THE CIRCUMFERENCE OF THE CAM GEAR, X BEING THE NUMBER OF DRIVE GEAR TEETH AND Y IS AN INTEGER JUST SLIGHTLY LESS THAN THE EXACT MULTIPLE OF THE SPEED RATIO BETWEEN THE DRIVE AND CAM GEARS, AND THE END SURFACE OF THE DRIVE PROJECTION HAVING A CIRCUMFERENTIAL WIDTH GREATER THAN THE PITCH OF THE DRIVE GEAR TEETH SUCH THAT THE DRIVE GEAR ROTATES THE CAM GEAR TO A POSITION AT THE END OF A DRIVEN ROTATIONAL CYCLE OF THE CAM GEAR SUCH THAT THE END SURFACE OF THE DRIVE PROJECTION IS LOCATED TO WIPE BACK AND PREVENT ENGAGEMENT OF THE TRIP MEANS BY THE LEADING EDGE OF THE PROJECTION.

Inventors

• 👤 D Guha

Bibliographic Details