Tone arm and phonograph pickup assemblies

Claim 2

An assembly for a record player, comprising: a phonograph pickup cartridge, and a tone arm having a free end portion which is provided with a cavity which opens downwardly and has an upper defining wall, said cavity being adapted to receive said cartridge, a projection rigidly connected to said wall and extending downwardly therefrom, a sleeve rigidly connected to and extending upwardly from an upper portion of said cartridge, said sleeve having a transverse wall forming a bottom thereof, and said upper defining wall and said projection having an opening in line with the interior of said sleeve, said opening being adapted to pass a tool which may be used to press against said sleeve bottom to dislodge said cartridge from assembly with said tone arm.

Claim 3

An assembly for a record player, comprising: an oblong pickup cartridge, and an elongated tone arm having a free end portion provided with a longitudinally extending cavity opening from the underside of said tone arm, said cartridge being disposed longitudinally within said cavity with its longitudinal axis at an acute angle with respect to the longitudinal axis of said tone arm whereby a stylus carried at the forward underside of said cartridge is disposed below said tone arm a distance sufficient to clear said tone arm and be disposed for engagement with a record, and a connection between said tone arm and said cartridge, comprising a projection carried on one part and a socket carried on the other part, said projection fitting coaxially within said socket and being held therein by a frictional fit, the connection being effected solely by relatively moving said tone arm and cartridge to move said projection into said socket along the axis of the latter, one of said projection and socket having its axis at a predetermined angle with respect to the longitudinal axis of the respective part on which it is carried so that axial movement of said projection into frictional fitting relation within said socket will correctly dispose said cartridge with its longitudinal axis at said acute angle with respect to the longitudinal axis of said tone arm.

Claim 4

An assembly for a record player, comprising: an oblong pickup cartridge, and an elongated tone arm having a free end portion provided with a longitudinally extending cavity opening from the underside of said tone arm, said cartridge being disposed longitudinally within said cavity with its longitudinal axis at an acute angle with respect to the longitudinal axis of said tone arm whereby a stylus carried at the forward underside of said cartridge is disposed below said tone arm a distance sufficient to clear said tone arm and be disposed for engagement with a record, and a connection between said tone arm and said cartridge, comprising a projection carried on one part and a socket carried on the other part, said projection fitting coaxially within said socket and being held therein by a frictional fit, the connection being effected solely by relatively moving said tone arm and cartridge to move said projection into said socket along the axis of the latter, one of said projection and socket having its axis at a predetermined angle with respect to the longitudinal axis of the respective part on which it is carried so that axial movement of said projection into frictional fitting relation within said socket will correctly dispose said cartridge with its longitudinal axis at said acute angle with respect to the longitudinal axis of said tone arm.

Claim 5

The construction according to claim 2 wherein said cavity is defined by top and side walls of said tone arm, wherein said projection is connected to the upper portion of said cartridge, and wherein said socket is a sleeve connected to said top wall and extends downwardly into said cavity from an inner surface of said top wall, said top wall having an opening adapted to pass a tool which may be used to press against the upper extremity of said projection to dislodge said cartridge from assembly with said tone arm.

Claim 6

The construction according to claim 2 wherein said cartridge has electrical terminal means and said tone arm has contact means electrically connected to the record player electrical system, said terminal means automatically engaging said contact means when said cartridge is moved to position within said tone arm cavity.

Claim 7

An assembly for a record player, comprising: an oblong cartridge, and an elongated tone arm having a free portion provided with a longitudinally extending cavity opening from the underside of said tone arm and defined by top and side walls thereof, said cartridge being disposed longitudinally within said cavity with its longitudinal axis at an acute angle with respect to the longitudinal axis of said tone arm whereby a stylus carried at the forward underside of said cartridge is disposed below said tone arm a distance sufficient to clear said tone arm and be disposed for engagement with a record, and a connection between said tone arm and said cartridge, comprising an opening through said top wall which is in communication with said cavity, and a projection extending from an upper surface of said cartridge and frictionally fitting within said opening, the connection being effected solely by relatively moving said tone arm and cartridge to move said projection into said opening for frictional interlocking fit with the defining wall thereof, the axis of said projection being at a predetermined angle with respect to the longitudinal axis of said cartridge so that axial movement of said projection into frictional locking relation with the defining wall of said opening will correctly dispose said cartridge with its longitudinal axis at said acute angle with respect to the longitudial axis of said tone arm.

Claim 8

An assembly for a record player, comprising: an oblong cartridge, and an elongated tone arm having a free portion provided with a longitudinally extending cavity opening from the underside of said tone arm and defined by top and side walls thereof, said cartridge being disposed longitudinally within said cavity with its longitudinal axis at an acute angle with respect to the longitudinal axis of said tone arm whereby a stylus carried at the forward underside of said cartridge is disposed below said tone arm a distance sufficient to clear said tone arm and be disposed for engagement with a record, and a connection between said tone arm and said cartridge, comprising an opening through said top wall which is in communication with said cavity, and a projection extending from an upper surface of said cartridge and frictionally fitting within said opening, the connection being effected solely by relatively moving said tone arm and cartridge to move said projection into said opening for frictional interlocking fit with the defining wall thereof, the axis of said projection being at a predetermined angle with respect to the longitudinal axis of said cartridge so that axial movement of said projection into frictional locking relation with the defining wall of said opening will correctly dispose said cartridge with its longitudinal axis at said acute angle with respect to the longitudial axis of said tone arm.

Claim 9

The construction according to claim 5 wherein the relative transverse dimensions of said opening and said projection are such that frictional locking fit occurs after said projection has entered into said opening an amount wherein an upper portion of said projection extends above the upper surface of said top wall to be in position for application of a pressing force thereagainst to remove said projection from said opening and thereby provide for removal of said cartridge from said tone arm cavity.

Claim 10

An assembly for a record player, comprising: a pickup cartridge, and a tone arm having a free end portion provided with a cavity opening from the underside of said tone arm defined by top and side walls of said tone arm, said cartridge fitting within said cavity, and a connection between said tone arm and said cartridge, comprising an opening through said top wall which is in communication with said cavity, and a projection extending from an upper surface of said cartridge and frictionally fitting within said opening, the relative transverse dimensions of said opening and said projection being such that frictional locking fit occurs after said projection has been entered into said opening an amount wherein an upper portion of said projection extends above the upper surface of said top wall to be in position for application of a pressing force thereagainst to remove said projection from said opening and thereby provide for removal of said cartridge from said tone arm cavity.

Claim 11

An assembly for a record player, comprising: a pickup cartridge, and a tone arm having a free end portion provided with a cavity opening from the underside of said tone arm defined by top and side walls of said tone arm, said cartridge fitting within said cavity, and a connection between said tone arm and said cartridge, comprising an opening through said top wall which is in communication with said cavity, and a projection extending from an upper surface of said cartridge and frictionally fitting within said opening, the relative transverse dimensions of said opening and said projection being such that frictional locking fit occurs after said projection has been entered into said opening an amount wherein an upper portion of said projection extends above the upper surface of said top wall to be in position for application of a pressing force thereagainst to remove said projection from said opening and thereby provide for removal of said cartridge from said tone arm cavity.

Claim 12

The construction according to claim 7 wherein said cartridge has electrical terminal means and said tone arm has contact means electrically connected to the record player electrical system, said terminal means automatically engaging said contact means when said cartridge is moved to its position within said cavity.