Abstract: A wheel bearing speed sensor includes an annular rotor mounted to a vehicle axle spindle, having a plurality of teeth extending radially outwardly, which is received within a stationary stator assembly. The stator assembly includes an annular stator having a corresponding plurality of teeth extending from one end and positioned proximate to the rotor teeth. A bobbin member is slidably received within the stator just above the radially aligned rotor and stator teeth and is restricted from movement toward the teeth. A flexible magnetic strip is magnetically adhered to the inner surface of the stator adjacent the bobbin member, wherein the magnetic strip restricts movement of the bobbin member axially away from the radially aligned teeth. A variable reluctance magnetic flux path is established simultaneously between all of the rotor and stator teeth as the spindle rotates, thereby inducing a corresponding variable voltage in the bobbin windings.

Abstract: The invention describes a method and apparatus for reconditioning a video disc signal pickup stylus electrode to prevent electrode-disc electrical shorts. An AC or DC potential is repetitively applied during a predetermined period between the stylus electrode and the disc to produce electrical breakdown at the electrode-disc interface and vaporize a portion of the electrode material. In the capacitive type video disc system, the capacitance sensing pickup circuitry is repetitively tuned to couple excessive amounts of rf potential to the stylus electrode.

Abstract: In a system for correcting tracking errors in a video disc player, digital information, corresponding to field numbers is encoded on the video signal during one horizontal line of the res ective vertical blanking interval. Tracking errors, such as a locked track condition or a skipped track condition are detected by noting improper sequence of two or more decoded field numbers. A kicker apparatus is provided to move the signal pickup device in a direction so as to reduce the tracking error.

Abstract: A video disc playback system for detecting field number information recorded on a sectored video disc and representing stylus location, and for correlating presently received field number information with previously received field number information. Presently received field number data is correlated to previously received field number data to determine whether or not the presently received data indicates the playback stylus to be playing back from a predicted sector of the disc and within a predicted range of radius from the center of the disc. These range and sector checks are used to reduce the probability of data errors passing undetected during playback.

Abstract: The quality of the low frequency signals recovered by a playback stylus may be improved by removing non-electrode metal deposits. A stream slurry lapper with a slurry of alumina in water can be used.