GB1265576A - - Google Patents

Abstract

1,265,576. Pick-up head. BRAUN A.G. 16 May, 1969 [18 May, 1968], No. 25084/69. Heading G5R. The playing weight of head 11 on pick-up arm 1 which is movable about vertical and horizontal pivot axes 3, 2 and fully counterbalanced by weight 12 is determined by an adjustably tensioned spring 7 secured at one end to pin 8 on the arm and having its other end connected via a cord 5 to a point 60 on the gramophone chassis. In a first arrangement, Fig. 1 (not shown), the cord extends over a pulley on the horizontal pivot axis to an adjustable point of attachment on the chassis in line with the vertical pivot axis. In the arrangement shown which can also provide an anti-skating force, the cord extends via a pulley 4 vertically pivoted in an elliptical slot 9 generally above the vertical axis 3 to an adjustable point 60 on the chassis. Adjustment of the positions of the pivot in the slot alters the anti-skating movement without altering the downward pressure on the playing head, whilst alteration of the position of point 60 by screw 6 alters both downward pressure and anti-skating movement in the same ratio. In the arrangement described with reference to Fig. 3, not shown, the point of attachment of the cord to the chassis is fixed but the pulley is vertically movable on its pivot.