Stylus position control system

In a disc record player including a turntable for rotatably supporting a disc record during playback;

• and a pickup stylus subject to engagement with a record surface during said playback, said stylus being supported at one end of a pickup arm, the opposite end of said pickup arm being pivotally mounted in a stylus housing which is subject to translatory travel between a rest position clear of said turntable and playback positions over said turntable, the apparatus comprising the combination of:
• a brush comprising a holder, and a plurality of bristles secured in said holder;
• height adjustable platform means for supporting said holder in a location in proximity to said turntable and in spaced apart relationship to said rest position beneath the path of travel of said stylus housing between said rest and playback positions;
• means for controlling the rotation of said pickup arm about an axis substantially parallel to the disc supporting surface of said turntable in a manner causing said stylus to protrude from said housing during travel of said stylus housing between said rest position and an intermediate position between said rest position and said playback positions;
• said arm rotation controlling means comprising:
• a stylus arm rest mounted in said stylus housing for motion between an elevated position and a depressed position;
• a first permanent magnet mounted on said stylus arm rest;
• selectively energized first actuating means including a stationary element means for generating a first field of magnetic flux, mounted within said stylus housing and cooperating with said first permanent magnet when energized, said first permanent magnet being positioned in close proximity to said first field of magnetic flux when said stylus arm rest is in said elevated position, for moving said stylus arm rest from said elevated position to said depressed position;
• means for selectively energizing said selectively energized first actuating means when said housing is in said playback positions;
• said energizing means serving to provide a given polarity of energization of said magnetic flux generating means;
• the orientation of said first permanent magnet relative to said magnetic flux generating means being such that said first permanent magnet is repelled away from said magnetic flux generating means during said energization of said given polarity to cause motion of said stylus arm rest from said elevated position to said depressed position;
• second actuating means, including a second permanent magnet, secured on said platform means and cooperating with said first permanent magnet during housing occupancy of said rest position and during travel of said housing between said rest position and an intermediate position between said rest position and said playback positions for causing said stylus arm rest to assume said depressed position during said housing occupancy of said rest position and during said travel of said stylus housing between said intermediate position and said rest position;
• said second permanent magnet serving to provide a second field of magnetic flux;
• the orientation of said first permanent magnet relative to said second permanent magnet being such that said first permanent magnet is attracted towards said second permanent magnet during travel of said stylus housing between said intermediate and said off-record rest position, to cause motion of said stylus arm rest from said elevated position to said depressed position;
• means for moving said stylus arm rest from said depressed position to said elevated position in the absence of said energization during travel of said housing between said intermediate position and said playback positions;
• and
• guide means, supported by said platform means, engaging said pickup arm during travel of said stylus housing between said rest position and said intermediate position to establish the position of said protruding stylus during such travel at an elevation ensuring stylus engagement with said bristles.