Abstract: A process determines the unbalance of a driven rotating rigid rotor with respect to at least one compensation plane of the rigid rotor according to relative position and size. The unbalance effect is determined in that the position and size of the oscillations caused by an unbalance in the subcritical range in at least one segment of a rotation of the rigid rotor are determined at least twice on at least one support of the rigid rotor. The time intervals between the individual determinations during at least one segment of the rotation are taken into account, and the change of the dynamic effect due to the acceleration is taken into account during at least one segment of the rotation.

Abstract: A process for connecting and removing a mounting disk having holders for vehicle wheel rims in the mounting or removing of tires from the rim includes the use of a tire mounting device having a rotatable pin. The mounting disk and the rotatable pin are connnected together by a separable sliding splined connection. Wheel rims are releasably connected to the disk for the mounting of tires onto or the removing of tires from the wheel rims. The rims are made of various materials and have various designs, diameters and widths. Connections are without restrictions pertaining to the maximum possible clamping jaw diameter of the disk and without risk of damaging the wheel rim. The mounting disk functions to secure fragile wheel rims and the disk is easily connected to the tire mounting device.

Abstract: A method and apparatus is provided for determining the unbalance of the wheels of a motor vehicle under test by means of unbalance measuring equipment. Such equipment is operated with a d.c. voltage supply in the form of the battery of the vehicle under test which functions as the sole source of that supply. The driven wheels of the vehicle under test are accelarated by the vehicle engine until a constant wheel speed is obtained within a given range. The unbalance values of the driven wheels at constant wheel speed are determined and appropriate correction is made. Wheel driving structure may also be provided for rotating the non-driven wheels of the vehicle under test to determine the unbalance of these wheels. The wheel driving structure for rotating the non-driven wheels is also powered by a d.c. voltage source in the form of the vehicle battery.

Abstract: A support is described for a bearing arrangement of a balancing machine for determining the effect of unbalance in two measuring planes. The support has a spindle that holds the component to be balanced in two planes. Vibration force pickups with a relative position indicator are provided for the determination of the fraction of the unbalance attributed to the individual plane as a function of size and magnitude. The design of a support integrally as box profile on which the spindle is laterally arranged is proposed to prevent the problems thusfar caused by the supports which influence the measured results in their reproducibility.

Abstract: A method is disclosed for the correction of errors in the measurement of caster, king-pin-inclination and camber on motor vehicles. Inclinometers are used whereby errors are avoided of the type caused by non-horizontal positioning of the vehicle under test. Measurements on the vehicle can easily be carried out without special loading-weights and without roping the vehicle down to the ground. The additional angles of error caused by the inclined position of the vehicle with respect to the horizontal are measured and combined as a correction factor with the measured geometrical values.

Abstract: Process and apparatus for mounting or demounting a vehicular pneumatic tire comprises positioning the tire beads within the inner circumference of a wheel during mounting of the tire. Beads are removed from within the interior of the wheel rim when the tire is demounted. The tire beads are subject to elastic deformation in order to reduce the bead diameter which then enables positioning of the bead within the interior of the wheel rim or removal of the bead from within the rim interior.

Abstract: Method and apparatus are described for bringing a rotating body, set in rotation by a drive, to a standstill as the conclusion of a work cycle. The rotating body may be placed in bearings in a balancing machine where it is investigated for unbalance. Characteristic values for the drive and the rotating body obtained during the acceleration phase are utilized in conjuction with one another for purposes of stopping the rotating body at an exact and specific position for machining purposes at that position on the surface of the rotating body.

Abstract: An unbalance measurement device is provided for a balancing machine for determining the unbalance of a rotor according to position and magnitude. The balancing machine has a drive motor, transducers, a spindle supporting the rotor to be balanced, and an increment disc fixed to the spindle. Filter circuitry for analog signals is provided for the purpose of reducing extraneous signals by means of a filter whose mid-frequency is controlled by a high control frequency. Due to this filtering, changes in the rotational frequency of the rotor to be balanced do not influence the determination of the position of the unbalance. In addition, in the case of correction in several planes, interference of the measurement in one plane caused by the preceding measurement in the other plane is prevented.

Abstract: This invention relates to a process and an apparatus for balancing a body of rotation in two parallel balancing planes disposed perpendicular to the rotational axis of the body. A slotted plate disposed substantially perpendicular to axis of rotation of the body conducts the rotary and translatory vibrations to separate transducers. The slots essentially divide the plate into an outer frame and central portion, which are connected by narrow linking strips. The rotary vibrations are transmitted by linking strips which are stressed in bending, whereas the translatory vibrations are transmitted by linking strips which are stressed in tension or compression. Unwanted force factors are eliminated by interposing members between their source and the foundation, such as by mounting the rotating body and slotted plate upon springs, which in some instances may be vertically disposed.