Abstract: An apparatus and method for reducing radial force variations of pneumatic tires by removing rubber in selected areas of the tire wherein a tire is rotated at a suitable high speed for nongrinding functions such as warmup and testing and the tire is rotated at a suitable slow speed for removing rubber from the selected areas of the tire. A tire with distinct suitable texture features was unexpectantly found using an apparatus and method.

Abstract: An apparatus and method for reducing radial force variations of pneumatic tires by removing rubber in selected areas of the tire wherein a tire is rotated at a suitable high speed for nongrinding functions such as warmup and testing and the tire is rotated at a suitable slow speed for removing rubber from the selected areas of the tire. A tire with distinct suitable texture features was unexpectantly found using an apparatus and method.

Abstract: A method and apparatus for tire uniformity correction. During a sensing phase, the tire to be corrected is rotated at a speed higher than the industry standard of 60 revolutions per minute while sensing the force variations to be removed. During a rubber removal phase, the tire is rotated at a slower speed tire while removing rubber in selected amounts from slected areas of the tire corresponding force variations. Frequency modified electrical signals are generated in response to the sensed force variations in the tire during the sensing phase, such signals being at frequencies higher than the industry standard of 60 cycles per minute. Such frequency modified signals are then filtered in summer amplifiers, processed and stored in a microprocssor and then utilized for the removal of rubber in a programmed manner.

Abstract: An improved of processing a tire on a uniformity machine comprising the steps of sensing the radial force variations in a tire and generating a composite waveform corresponding to the sensed force variations, converting the composite waveform into a special function waveform selected from the class of waveforms which includes filtered partial square waves, partial sine waves and full sine waves, selecting either from a table or adaptively one of the special function waveforms and grinding of the tire in response to the selected special function waveform.

Abstract: A method and apparatus for tire uniformity correction. During a sensing phase, the tire to be corrected is rotated at a speed higher than the industry standard of 60 revolutions per minute while sensing the force variations to be removed. During a rubber removal phase, the tire is rotated at a slower speed tire while removing rubber in selected amounts from selected areas of the tire corresponding force variations. Frequency modified electrical signals are generated in response to the sensed force variations in the tire during the sensing phase, such signals being at frequencies higher than the industry standard of 60 cycles per minute. Such frequency modified signals are then filtered in summer amplifiers, processed and stored in a microprocessor and then utilized for the removal of rubber in a programmed manner.

Abstract: An apparatus for reducing radial force variations of pneumatic tires by removing rubber in selected areas of the shoulders wherein the current generated by each grinder motor is detected, converted into DC voltages of opposite polarities which are summed with a resultant voltage shown on a meter. When the resultant voltage differs from a predetermined level, usually zero, the grinding wheels can be adjusted thereby balancing the amount of grinding performed on the shoulders of the tire.

Abstract: A tire uniformity machine where grinding is effected through electronics which compare the electrical output signals of tire variation sensor means to a percentage of the peak to peak variations of the signals.

Abstract: An apparatus for monitoring the noise which impinges a human ear and for generating a signal representing the noise level accumulated over a period of time. Typically, the apparatus can be located in a hearing protector worn by a worker in a noisy environment. A microphone generates a signal having a magnitude representing the detected noise level of the ear which signal is processed by an absolute value circuit and a root mean square circuit to generate a signal having a magnitude proportional to the logarithm of the detected noise level. This logarithmic signal is converted by a voltage to frequency converter and a counter accumulates a count total proportional to the noise level over a period of time. The apparatus includes visual and aural alarms to indicate a maximum allowed noise level and dosage. The apparatus can also be inserted into a storage unit for reading the data, calibrating the noise monitor circuitry and recharging the batteries in the apparatus.