Phonographic pick-up and stylus assembly having removable attachment for cleaning record

Claim 1

A replaceable stylus assembly for a phonograph pickup cartridge of the type used with a phonograph record disc having a sound modulated spiral record groove, said replaceable stylus assembly comprising: a supporting structure; a stylus projecting outwardly from the supporting structure so as to be engageable with a record groove to translate the modulations into mechanical vibrations; a brush comprising a plurality of bristles for sweeping dust from the record in the path of the stylus in advance thereof, said brush having a lower, record engaging edge and said bristles tapering outwardly and downwardly toward said lower edge; an elongated arm having said brush affixed to one end; a transverse cross member fixed at one end thereof to the other end of said arm; mounting means for removably and freely pivotally mounting said brush on said supporting structure so as to enable said brush to be freely shiftable between an operative position projecting outwardly in the same general direction as the stylus for at least the same distance and an inoperative position in which it projects outwardly less than the stylus, said mounting means including two opposed, spaced apart flanges extending laterally from said cross member, said flanges each have inwardly extending portions thereon adapted to engage depressed portions on said stylus assembly supporting structure; and depressed portions in said stylus assembly supporting structure spaced so as to receive said inwardly extending portions of said flanges and to cooperate therewith in freely pivotally supporting said brush to said stylus assembly supporting structure, said mounting means being arranged so that said brush is normally urged outwardly toward the operative position to engage the record groove in the path of the stylus and at a point in advance thereof, said brush being offset laterally in a plane which is Spaced radially inwardly of said stylus toward the center of the record disc when the assembly is in said operating position with the brush projecting outwardly from the mounting means at a transverse angle extending toward the plane of the stylus whereby the brush serves to direct any dust inwardly toward the center of the record grooves and away from the stylus.