Shifting to sustainable industries

A control arrangement for a machine which automatically changes disc records. The structure for controlling the sequence in which the records are played, in accordance with selections which are preliminarily made, includes two rows of apertured memory magnets directed to an electrical selecting mechanism so that through the latter information in accordance with the records selected is introduced into the memory magnets. The memory magnets in one row are respectively aligned with the memory magnets in the other row to form therewith pairs of aligned magnets which respectively correspond to the opposite sides of a given record. A signal-extinguishing conductor extends through each pair of aligned memory magnets, has one end connected to one electrical contact and has an opposed end connected to a collecting conductor which is common to all of the opposed ends of all of the signal-extinguishing conductors. An electrically conductive slip member extends along the row of contacts to which all of the signal-extinguishing conductors are respectively connected, and a scanner is moved together with a movable record magazine along the slip member and successively along the row of contacts providing a bridge between the latter and the slip member. A read-out conductor extends through all of the memory magnets in one row which correspond respectively to one of the sides of the series of records and another read-out conductor extends through the memory magnets of the other row which respectively correspond to the other sides of the series of records in the magazine. These read-out conductors are both connected electrically to a dual read-out amplifier, and an electrical circuit is connected with the slip member, the common collector conductor, and the amplifier for providing automatic selection of a given side of a given record corresponding to a memory magnet to which a selecting signal has been transmitted to be stored therein, when the scanner bridges the contact connected to the signal-extinguishing conductor which passes through the latter memory magnet which has the selection signal and completes a circuit between the latter contact and the slip member.