System and method for identifying angular location and amount of wheel balancing weights

Claim 1

In a system for detecting the angular locus for weights to be secured to a rotatable body in balancing the body means for electronically monitoring unbalanced forces on the body to generate a periodic waveform thereof in which the wave crosses the zero amplitude axis in a negative going direction during the period thereof at an angular position wherein said weight should be added to the body, comprising means for generating a cross-over pulse in response to each negative going crossing of the zero axis, locus detecting means having two inputs, one of said inputs being operatively coupled to receive said cross-over pulses, means serving to sense each revolution of the body and to provide a reference pulse in response thereto, timer means responsive to said reference pulse for generating an angle pulse, said angle pulse forming said second input to said locus detecting means, lighting means coupled to said locus detecting means, said detecting means serving to detect when said signals are conjointly present on said two inputs and serving to operate said lighting means from a first to a second condition responsive to the conjoint presence of said first and second inputs, means for varying the duration of said angle pulse from a first pulse duration to a second pulse duration until said second condition is on the verge of being achieved, the degree of said varying of the last named said means serving to define the angular position for weight to be added.