Method for manufacturing a diamond stylus for video disc players
AssigneeRCA Corporation
InventorYasushi Matsumoto
Life of this patent
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Abstract
A method of manufacturing a stylus by modifying a square post shaped diamond element is disclosed. A tip having a conical surface is ground at one end of the diamond element. An electrode bearing surface is formed in the region of the tip such that the angle subtended by the electrode bearing surface with the axis of the element is not less than the angle included between the conical surface and the axis. A record engaging surface substantially orthogonal to the electrode bearing surface is formed in the tip region such that the two surfaces intersect along a line substantially perpendicular to the stylus axis. A thin layer of conductive material is deposited on the electrode bearing surface to form a stylus electrode.
Claims13
A method for forming a pickup stylus for playing back prerecorded signals from a disc record by modifying a stylus element;
- said method comprising the steps of:
- (A) forming a tip having a conical surface at one end of said stylus element;
- said conical tip having an axis;
- (B) forming a substantially flat, non-record-engaging surface in the region of said tip;
- (C) forming substantially flat, record-engaging surface substantially orthogonal to said non-record-engaging surface in said tip region such that said flat surfaces intersect each other along a line substantially perpendicular to said axis and forming the base edge of said record-engaging surface;
- and
- (D) forming a pair of converging, substantially flat surfaces in the region of said tip such that the intersection of said converging flat surfaces with said record-engaging surface defines the sides of said record-engaging surface.
A method for forming a stylus by modifying a stylus element;
- said method including the steps of:
- (A) forming a tip having a conical surface at one end of said stylus element;
- said conical tip having an axis;
- (B) forming a substantially flat, non-record-engaging surface in the region of said tip;
- (C) forming a substantially flat, record-engaging surface substantially orthogonal to said non-record-engaging surface in said tip region such that said flat surfaces intersect each other along a line substantially perpendicular to said axis and forming the base edge of said record-engaging surface;
- (D) forming a pair of converging, substantially flat surfaces in the region of said tip such that the intersection of said converging flat surfaces with said record-engaging surface defines the sides of said record-engaging surface;
- and
- (E) depositing a layer of conductive material on said non-record-engaging surface to form a stylus electrode.
A method for forming a stylus having a triangular footprint by modifying a stylus element;
- said method comprising the steps of:
- (A) forming a tip having a conical surface at one end of said stylus element;
- said conical tip having an axis;
- (B) forming a first flat surface in the region of said tip such that the angle subtended by said first flat surface with said axis is not less than the angle included between said conical surface and said axis;
- (C) forming a second flat surface substantially orthogonal to said first flat surface in said tip region such that said first and said second flat surfaces intersect each other along a line substantially perpendicular to said axis;
- said perpendicular line forming the base edge of said triangular footprint disposed in the plane of said second flat surface;
- (D) forming a pair of converging flat surfaces in the region of said tip such that the intersection of said converging flat surfaces with said second flat surface defines the sides of said triangular footprint and the intersection of said converging flat surfaces with said conical surface defines the apex of said triangular footprint;
- and
- (E) depositing a layer of conductive material on said first flat surface to form a stylus electrode.
A method for forming a stylus having a triangular footprint by modifying a stylus element;
- said method comprising the steps of:
- (A) forming a tip having a conical surface at one end of said stylus element;
- said conical tip having an axis;
- (B) forming a first flat surface in the region of said tip such that the angle subtended by said first flat surface with said axis is not less than the angle included between said conical surface and said axis;
- (C) depositing a layer of conductive coating on said first flat surface to form a stylus electrode;
- (D) forming a second flat surface substantially orthogonal to said first flat surface in said tip region such that said first and said second flat surfaces intersect each other along a line substantially perpendicular to said axis;
- said perpendicular line forming the base edge of said triangular footprint disposed in the plane of said second flat surface;
- and
- (E) forming a pair of converging flat surfaces in the region of said tip such that the intersection of said converging flat surfaces with said second flat surface defines the sides of said triangular footprint and the intersection of said converging flat surfaces with said conical surface defines the apex of said triangular footprint.
Dependencies are inferred from the claim text.