Dynamic information storage or retrieval – Specific detail of information handling portion of system – Mechanical modification or sensing of storage medium
Patent
1979-12-05
1981-06-02
Shepperd, John W.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Mechanical modification or sensing of storage medium
369256, G11B 2100, G11B 310
Patent
active
042707587
ABSTRACT:
A stylus guard assembly for use with a phonograph pick-up cartridge, which assembly includes a cam member, a manually operated lever with a pivot operating arm and walls providing detent surfaces. The pivot operating arm is disposed at an angle to a lever which engages a curved cam slot on a stylus guard. When the lever is manually displaced through its designated travel, the movement at the end of the arm, through the action of the cam mechanism, causes the guard to rotate on its pivot from one position to another. In one position, the guard is retracted to expose the stylus. In both positions, the guard is held in place by the detent mechanism. The manually operated lever produces a visual indication of the stylus guard position, which shows whether the stylus guard is in the position to allow the stylus tip to engage with the recording or is in the position to protect the stylus when not in use.
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Shepperd John W.
Shure Brothers Inc.
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