Abstract: A torch-mounted power controller mounts to the handle of a welding torch and includes a control lever that is operated by the user's finger. The control lever is arranged to allow the user to hold the torch with a normal grip. Power supply to the welding torch is controlled by applying finger pressure to a control lever. A voltage control circuit is operatively connected to the control lever and controls the amount of power supplied responsive to the movement of the control lever.

Abstract: A torch-mounted power controller mounts to the handle of a welding torch and includes a control lever that is operated by the user's finger. The control lever is arranged to allow the user to hold the torch with a normal grip. Power supply to the welding torch is controlled by applying finger pressure to a control lever. A voltage control circuit is operatively connected to the control lever and controls the amount of power supplied responsive to the movement of the control lever.

Abstract: An evaluation circuit is depicted for evaluating the overall group similarity between a plurality of first signals with a plurality of second signals and for producing a signal based on the level of similarity or dissimilarity. Such an evaluation circuit includes a plurality of operator circuits each of which compares corresponding ones of the first and second signals and which outputs the result of that comparison to a single summary function circuit. The summary function circuit produces an output signal that corresponds to a weighted summary of the comparison results. Finally, a comparitor circuit compares the output from the summary function circuit with a criterion signal and, depending upon the desired degree of similarity produces a binary output signal whose value is based on the magnitude of the summary function output signal being greater than the magnitude of the criterion signal.