Abstract: A phonograph cartridge alignment gauge includes a plate, a cartridge work station and a visual indicator. A method of aligning a cartridge on a tone arm with the gauge, for stylus tangency at two radii, includes fastening the cartridge to the tone arm while the cartridge is on the work station and the turntable spindle is within a combination pivot point-spindle opening of the gauge, to establish stylus tangency at a first radii. The cartridge is refastened to the tone arm while the cartridge remains in the work station but after the tone arm is moved and the gauge pivoted about the combination opening, to establish stylus tangency at a second radii while maintaining tangency at the first. An alternate gauge and method include similar details.

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.

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.