Beissbarth Gmbh

Ronald Kelm-Klager

Hermann Bux

In a balancing apparatus, for determining the compensation position and the magnitude of a compensation weight to be attached to the automotive wheel on the basis of the measuring values obtained during the balancing process, the respective radius and the respective compensation plane for the compensation position at the automotive wheel are sensed via a sensor arm, an electronic device determines the magnitude of the compensation weight to be attached to the automotive wheel. The sensor arm is supported extendably and pivotally. Two string assemblies are attached to the sensor arm. The strings of the sensor arm are mechanically lockable at one or the other compensation position, respectively. One of the string assemblies on the sensor arm comprises an extendable spring and a stop which runs through a locking block attached to the housing of the balancing apparatus and and also comprises, at the other end an extendable spring. The other string assembly comprises a string attached to the housing of the sensor arm which ends at an endless string loop assembly. One run of the string assembly runs through a locking block attached to the housing of the balancing apparatus and the other run of the string of the string assembly comprises a stop which is lockable via the locking device. The compensation position or the compensation positions are thus stored in a mechanical manner, and the sensor arm is only extendable up to the respective position.

Method and apparatus for balancing automobile wheels

In the tire examination method before and after an alteration in the tire pressure a respective interferogram is produced of the tire surface using coherent radiation and the interferogram is converted into a modulo 2 .pi. image, which for its part is processed to obtain a gray value image and in the case of which from a comparison of the gray value images information concerning any defects present in the tire is obtained. For testing a tire the wheel, which bears such tire to be tested, is arranged on a driven roller set by driving the vehicle with the wheel, a test head is moved toward the tire to be at a predetermined test distance therefrom for producing such interferograms, at a first test segment of the tire examination for defects is performed, the wheel is incrementally rotated by the roller set by an amount equal to the size of a test segment and so many test segments are examined that the complete tire is tested. The tire testing apparatus possesses an air pressure means for altering the tire pressure, a test head and a computer.

Method and apparatus for testing tires on a motor driven roller set

In the tire examination method before and after an alteration in the tire pressure a respective interferogram is produced of the tire surface using coherent radiation and the interferogram is converted into a modulo 2.pi. image, which for its part is processed to obtain a gray value image and in the case of which from a comparison of the gray value images information concerning any defects present in the tire is obtained. For testing a tire the wheel, which bears such tire to be tested, is arranged on a driven roller set by driving the vehicle with the wheel, a test head is moved toward the tire to be at a predetermined test distance therefrom for producing such interferograms, at a first test segment of the tire examination for defects is performed, the wheel is incrementally rotated by the roller set by an amount equal to the size of a test segment and so many test segments are examined that the complete tire is tested. The tire testing apparatus possesses an air pressure means for altering the tire pressure, a test head and a computer.

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Landsberg/Lech, Germany

Ronald Kelm-Klager