Abstract: The invention relates to a device for selecting products, in particular tyre patches, depending on the size of damage previously done to the tyre. For this purpose, two legs (1, 2) are connected in a rotatable manner to a hinge joint (3). The legs (1, 2) have tapering areas (4) in the area of the measuring ends. A power element (5) is positioned in such a way that the legs (1, 2) are returned to the starting position upon completion of the selection process. In the area of the measuring ends of the legs (1, 2), projections (6) are formed which are oriented in a direction of movement which corresponds to a movement separating the tapering areas (4) of the legs (1, 2). On at least one of the legs (1, 2), a display area (7) is provided in which during the selection process at least one product is selected or displayed depending on the position of the other leg (1) in the display area (7).

Abstract: A portable apparatus for aligning the axles of a tractor, a trailer, or other vehicle and for detecting bends, bows, twists amd other irregularities in vehicle frames, has a light source used to provide a reference plane from which measurements can be taken. Dual targets are attached to the underside of the vehicle frame and are used in conjunction with the light source to establish the reference plane. The light source is slidably arranged on a U-shaped frame and is positionable to project a light beam at the targets. The U-shaped frame is directly attached along the center axis of the wheel axle so that the horizontal bar on which a light support is arranged with be parallel to the wheel axle and thus provide an accurate measurement of missalignment. The U-shaped frame and dual targets are provided with features which allow both to be leveled easily. Rollers are provided on the leveling supports of the U-shaped frame to facilitate movement of the frame along the underlying surface as the axle is aligned.