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US 4,295,277 AGranted
Stylus positioner
AssigneeDennesen Electronics Inc.
InventorsFrancis G. Dennesen, Richard S. Wilson, Roy D. Toulan, Jr., Peter Madnick
Life of this patent
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AssigneeDennesen Electronics Inc.
InventorsFrancis G. Dennesen, Richard S. Wilson, Roy D. Toulan, Jr., Peter Madnick
Estimating the term…
The invention provides a method and apparatus for rapid and accurate stylus overhang positioning and tangential alignment with respect to a turntable. Accordingly a stylus locater plate having an aperture and a stylus positioning mark spaced therefrom is mounted on the spindle of a turntable. A pivot arm is connected to the locater plate on the other side of said spindle from the stylus positioning mark. The pivot arm and thus the locater plate, are then rotated around the spindle until such arm crosses over the pivot axis of the stylus arm of the turntable, to locate the mark in the turntable. The stylus arm is then pivoted toward the mark and the stylus cartridge is adjusted in the stylus arm to position the stylus in registration with such mark. The locater plate is further provided with lines near such mark to guide the angular positioning of the stylus cartridge into a tangential alignment with the record grooves at such mark.
A stylus positioner for a turntable assembly, which assembly has a turntable mounted to rotate about a spindle and a stylus arm pivotably mounted proximate said turntable, which stylus arm moves on a pivot axis relative to said turntable, which positioner comprises;
A stylus positioner for a turntable assembly, which assembly has a turntable mounted to rotate around a spindle and a stylus arm pivotably mounted proximate said turntable, which stylus arm moves on a pivot axis relative to said turntable, which positioner comprises;
A method for positioning a stylus on a turntable comprising mounting a locater plate having an aperture on a spindle of a turntable, said plate having a geopoint mark thereon, positioning said plate so that a first line extending from said geopoint through said spindle intersects at a desired angle with a second line extending from the pivot axis of the stylus arm, associated with said turntable at least into proximity with said spindle to correctly position and locate said geopoint relative to said stylus arm pivot axis and turntable and positioning said stylus in registration with the so-located geopoint.
Dependencies are inferred from the claim text.