CARTRIDGE EJECT ACTUATING CIRCUITRY FOR MULTI-TRACK TAPE CARTRIDGE PLAYER

摘要

Cartridge eject actuating circuitry for a multi-track tape cartridge player includes a rotary switch having a plurality of contacts equal in number to the number of tracks on a tape in a cartridge inserted into the player. The wiper of the rotary switch is coupled to the tape head indexing cam of the player and moves to corresponding contacts of the switch in accordance with the rotation of the cam. The indexing cam is rotated by an indexing solenoid enerized by the movement of a conductive strip on the tape into alignment with a sensor. A cartridge eject solenoid is coupled to the rotary switch contacts and to the power source of the tape player through a capacitor. Movement of the rotary switch wiper to a predetermined contact causes the capacitor to be charged to energize the solenoid during the charging time of the capacitor for ejection of the cartridge from the player. During movement of the wiper between contacts, the capacitor is discharged, but the cartridge eject solenoid is maintained de-energized to permit movement of the conductive strip on the tape to move past the sensor thereby avoiding subsequent ejection of the cartridge and/or indexing of the tape head upon reinsertion of the cartridge into the player.