Brush contact for phonograph tone arm dynamic stabilizer
AssigneeShure Brothers, Inc.
InventorsJames Kogen, C. Roger Anderson
Life of this patent
Estimating the term…
Abstract
An improved brush contact for a phonograph tone arm dynamic stabilizer. The contact includes bristles on a base, with free ends fanned in an arc. A portion of the bristles contact a record surface. Lateral movement of the tone arm across the record pivots the bristles and base, bringing new bristles into contact with the record surface.
Claims6
A phonograph cartridge assembly for playing a phonograph record, the record having a record surface with a record trace, the assembly comprising:
- a phonograph cartridge;
- a phonograph stylus carried on the phonograph cartridge, the stylus having a longitudinal extent which, while the stylus is on the record, is parallel to a tangent to the record trace, the stylus thereby defining a longitudinal direction in the direction of the longitudinal extent;
- a phonograph tone arm dynamic stabilizer mounted on the phonograph cartridge;
- and
- a brush contact for the phonograph tone arm dynamic stabilizer mounted on the stabilizer and including a bristle base, bristles mounted on the base and having free ends fanned in an arc about the base, the arc defining a plane of the arc, and means for mounting the bristle base to the stabilizer (a) for positioning the plane of the arc substantially transverse to the longitiudinal direction of the stylus, with the cartridge, stylus, stabilizer and brush contact being constructed, sized and arranged such that a portion of the bristle free ends may contact the phonograph record surface while the stylus tracks the record trace, and (b) for providing pivoting of the base and the bristles in the plane of the arc in response to some forces applied to the assembly in the plane of the arc such that another portion of the bristle free ends may contact the phonograph record surface while the stylus tracks the record trace.
A phonograph cartridge assembly for playing a phonograph record, the record having a record surface with a record trace, the assembly comprising:
- a phonograph cartridge;
- a phonograph stylus carried on the phonograph cartridge, the stylus having a longitudinal extent which, while the stylus is on the record, is parallel to a tangent to the record trace, the stylus thereby defining a longitudinal direction in the direction of the longitudinal extent;
- a phonograph tone arm dynamic stabilizer mounted on the phonograph cartridge;
- and
- a brush contact for the phonograph tone arm dynamic stabilizer mounted on the stabilizer and including a bristle base, bristles mounted on the base and having free ends fanned in an arc about the base, the arc defining a plane of the arc, and an axle mounted on the stabilizer, the base being mounted on the axle for rotation of the base and the bristles about the axle in response to some forces applied to the assembly in the plane of the arc;
- the cartridge, stylus, stabilizer, brush and axle being constructed, sized and arranged such that the plane of the arc is substantially perpendicular to the longitudinal direction while the stylus is tracking the record trace and such that a portion of the bristle free ends contact the phonograph record surface while the stylus is tracking the record trace, and such that after pivoting of the base and the bristles in response to said forces another portion of the bristle free ends may contact the phonograph record surface while the stylus tracks the record trace.
Dependencies are inferred from the claim text.