Gkn Transmissions Limited

Brian Michael Forster

The invention provides a display device for a rotary balancing machine. The balancing machine generates a digital out of balance weight signal of value W at an angular position .theta. with respect to a datum angle to indicate value and position of a weight required for balancing purposes. In the display device the weight signal is fed to a pre-programmable read only memory programmed to provide a digital output equivalent to an angle of arc cos ( W/2W.sub.1) where W.sub.1 is a predetermined weight to be used for balancing purposes. Angles .theta..sub.1 and .theta..sub.2 such that .DELTA..theta.=.theta.-.theta..sub.1 =.theta..sub.2 -.theta. are normally displayed but for calibration purposes can be suppressed to enable signals W and .theta. to be displayed. Weights of the predetermined value placed at angles .theta..sub.1 and .theta..sub.2 should completely balance the wheel.

Display device for rotary balancing machines

Wheel alignment testing apparatus for vehicles comprises a reference surface plate adapted to be attached to a wheel to be tested and sensing means for sensing the attitude of the reference surface plate. The sensing means includes feelers for contacting the reference surface plate, and a transducer associated with each feeler for providing a signal which represents the position of the feeler, the signals derived from the transducers being analysed by a circuit for giving an indication of the relevant wheel alignment parameters. The apparatus includes driven rollers on which the wheel under test are supported, the test being carried out with the vehicle's wheels rotating. The electric circuit includes means for compensating for any wobble of the reference surface plate if it is not properly aligned with the wheel to which it is attached.

Wheel alignment testing apparatus

Apparatus for elevating and supporting a wheeled vehicle comprises a vehicle receiving platform, and supporting means for the platform providing for angular movement of the platform in a vertical plane extending longitudinally of the vehicle. One position of the platform is arranged so that the vehicle can be driven on its own wheels onto and off the platform. The support means includes a member which supports the platform in the mid region of the length of the platform, elevator means being provided for raising and lowering such member and thus moving the platform from a horizontal loading position to an inclined working position, the platform being pivotally supported at opposite ends about horizontal axes transverse to the length of the platform.

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Sheffield, United Kingdom

Brian Michael Forster