Reproducing stylus and method of making same
AssigneeNamiki Precision Jewel Co., Ltd.
InventorHiroshi Shimamoto
Life of this patent
Estimating the term…
Abstract
A reproducing stylus for a record having a sound groove, said stylus formed by removing front and back portions of its contact area with the sound groove to obtain an edge line portion having an orientation perpendicular to the direction of record travel and a width d where the effective radius of curvature of the stylus tip is approximately 1/2 d. The edge line portion is formed by reciprocally moving and grinding the tip on a grinding groove.
Claims28
A reproducing stylus for a record having a sound groove, said stylus formed by removing to a predetermined depth front and back portions of its contact area with the sound groove, said front and back portions being relative to the direction of stylus movement in the sound groove to obtain a groove contacting, ridge-like edge line portions having a lengthwise orientation perpendicular to the direction of record travel and a width d in said direction of record travel where the effective radius of curvature in said direction of record travel where the effective radius of curvature in said direction of record travel of the stylus tip is approximately 1/2 d.
A reproducing stylus for a record having a sound groove, said stylus formed by removing to a predetermined depth front and back portions of its contact area with the sound groove, said front and back portions being relative to the direction of stylus movement in the sound groove to obtain a groove contacting, ridge-like edge portion of said predetermined depth having a lengthwise orientation perpendicular to the direction of record travel where the effective radius of curvature of the stylus at the edge portion in said direction of record travel is substantially reduced with respect to that at the contact area prior to the removal of the said front and back portions.
Dependencies are inferred from the claim text.