Abstract: A pick-up arm assembly for a record player comprises a pick-up arm mounting, a counterbalance device which includes a counterweight and which is mounted to the pick-up arm mounting so as to be pivotable about vertical and horizontal axes, and a pick-up arm comprising a tube having sound pick-up means disposed at one end and an insert fitting means disposed at the other end. The insert fitting means is capable of being received by the counterbalance device to enable the pick-up arm to be removably fitted to the counterbalance device. The counterweight is mounted in the counterbalance device so that it is substantially horizontally displaceable with respect to the horizontal pivot axis, and adjusting means is arranged at the end of the pick-up arm remote from the sound pick-up means to enable substantially horizontal displacement of the counterweight to be effected when the insert fitting means is fitted to the counterbalance device.

Abstract: A control device for a pick-up arm of a record player comprises a power take-off element disposed on a vertical spindle of the arm, a planetary gear arrangement comprising a sun wheel and at least one planet wheel in engagement with the sun wheel, and a rotatable support means connected to the sun wheel by a clutch and mounting the planet wheel or wheels. On rotation of the sun wheel the rotatable support means with the planet wheels mounted thereon also rotates until either a planet wheel or a drive wheel fixed to the planet wheel comes into contact with the power take-off element, whereupon the clutch slips and the planet or drive wheel will rotate and, through frictional contact with the power take-off element, will rotate the spindle and thus swivel the pick-up arm. The control device also includes lifting means responsive to rotation of the rotatable support means to raise the pick-up arm before the planet wheel or drive wheel is brought into contact with the power take-off element.