Stylus protection mechanism
AssigneeShure Brothers, Inc.
InventorsAllen R. Groh, Joseph D. Kehl
Life of this patent
Estimating the term…
Abstract
A phonograph stylus protection mechanism includes a protective zone defining member and a stylus deflector. The deflector moves the stylus to the protective zone during lateral deflection of the stylus to prevent stylus and record damage.
Claims9
A phonograph stylus protection mechanism in a stylus assembly having a stylus with a tip and a shank, the stylus being pivotably mounted to the assembly at a pivot point along the shank and being deflectable into and out of operating and non-operating positions by external forces, the mechanism comprising:
- a zone defining member on the assembly including limiting surfaces adjacent the operating position and defining a protective zone for the stylus in which the stylus is protected from external forces;
- and
- means on the assembly for guiding the stylus to the protective zone during lateral deflection of the stylus away from the operating position, the means including angled deflection edges positioned (1) to be physically contacted by the stylus during the lateral deflection and (2) to guide the stylus to the protective zone through the physical contact;
- whereby the stylus is protected from damage during lateral deflection.
A phonograph stylus deflection mechanism in a stylus assembly, the stylus assembly including a stylus with a stylus tip stylus tip edges and a stylus shank, an armature, a stylus mounting sleeve, a bearing, and a spring wire the armature being mounted on the stylus shank and within the bearing, the bearing being mounted within the stylus mounting sleeve, the stylus mounting sleeve being mounted within the stylus housing and the spring wire being mounted to the armature, with the stylus shank and tip extending longitudinally forward and downward out of the housing and sleeve to contact a flat disc record at an operating position and with the spring wire and bearing providing flexible lateral and vertical movement of the stylus about a pivot point about the operating position, the phonograph stylus deflection mechanism comprising:
- means on the assembly (a) for defining a vertical raised protective zone for the stylus and (b) for limiting the lateral deflection of the stylus tip to a maximum lateral deflection in each direction of lateral movement of the stylus from the operating position, said means including two opposed limiting surfaces above and laterally spaced from the operating position at the maximum lateral deflection adjacent the stylus tip, the limiting surfaces being longitudinally angled toward the pivot point to provide surface contact with the stylus shank edges adjacent the stylus tip;
- and
- means on the assembly (a) for guiding the stylus to the protective zone during lateral deflection of the stylus in both lateral directions from the operating position, and (b) for supporting the stylus during movement to the protective zone, said means including a stylus deflecting sleeve mounted within the stylus housing adjacent and longitudinally forward of the stylus mounting sleeve, the stylus deflecting sleeve including two opposed, vertically and laterally angled deflection edges positioned adjacent the stylus shank for upwardly deflecting the stylus to the protective zone upon contact of the stylus with the sleeve and supporting the shank during said deflection.
Dependencies are inferred from the claim text.