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US 7,944,803 B2Granted
Tone arm assembly
OwnerAllen Perkinsinventor
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OwnerAllen Perkinsinventor
Estimating the term…
A tone arm assembly for use with a rotatable turntable. The tone arm assembly includes a tone arm body supported adjacent to the rotating turntable being horizontally pivotable about a vertically extending axis. A tone arm tube is provided having a longitudinal axis and a first end and a second end, the first end extending within and being supported by the tone arm body and the second end terminating at a shell for releaseably supporting a pick up cartridge. A counterweight is included which is translatable along a horizontal path parallel to the longitudinal axis of the tone arm tube between a first position and a second position, the first position being closest to the shell and a second position being farthest from the shell to adjust contact pressure between a stylus maintained by the pick up cartridge and a record supported by the rotatable turntable. At least a portion of the counterweight is capable of extending fore and aft of the vertically extending axis when the counterweight is positioned on its horizontal path between its first and second positions.
A tone arm assembly for use with a rotatable turntable, said tone arm assembly comprising a tone arm body supported adjacent said rotatable turntable being horizontally pivotable about a vertically extending axis, a tone arm tube having a longitudinal axis and a first end and a second end, said first end extending within and being supported by said tone arm body and said second end terminating at a shell for releasably supporting a pick up cartridge, a counterweight translatable along a substantially horizontal path substantially parallel to the longitudinal axis of said tone arm tube between a first position and a second position, said first position being closest to said shell and said second position being farthest from said shell to adjust contact pressure between a stylus maintained by said pick up cartridge and a record supported by said rotatable turntable, wherein at least a portion of said counterweight is capable of extending fore and aft of said vertically extending axis when said counterweight is positioned on said horizontal path between said first and second positions.
In a tone arm assembly for use with a rotatable turntable, said tone arm assembly comprising a tone arm body supported adjacent said rotatable turntable and having said tone arm body horizontally pivotable about a vertically extending axis, a tone arm tube having a longitudinal axis and a first end and a second end, said first end extending within and being supported by said tone arm body and said second end terminating at a shell for releasably supporting a pick up cartridge and a weight tethered from an umbilical for creating a force of urging said pick up cartridge away from the center of said rotatable turntable, the improvement comprising a cam defining a surface of said tone arm body over which said umbilical passes.
In a tone arm assembly for use with a rotatable turntable, said tone arm assembly comprising a tone arm body supported adjacent said rotatable turntable and having said tone arm body horizontally pivotable about a vertically extending axis, a tone arm tube having a longitudinal axis and a first end and a second end, said first end extending within and being supported by said tone arm body and said second end terminating at shell for releaseably supporting a pick up cartridge, the improvement comprising an opening in the shell positioned for establishing appropriate overhang of the shell with respect to said pick up cartridge.
Dependencies are inferred from the claim text.