Hello James and Clark ! Albert Staib and George Abendschein formed the S-A action in 1890. They built grand and upright actions of the ordinary type for the trade. However they wanted to improve the upright action to have a positive and never failing repetition. To this end they hired the famous inventor Snyder. After two years of effort he gave up on the project. Albert and George however thought he was near achieving his goal. They undertook the task and did indeed succeed They named it the "Mastertouch" action. One of its strong points was its elasticity and lightness of touch. There are two such actions one the let-off adjustment is like standard actions the first action had a much more complicated let off with the top part being the alike. Both actions worked equality well. My opinion of why all Piano Companies did not use this superior action was cost and pride. Most of the regular S-A actions had a small brown medal name plate on the left end of the hammer butt rail on grand actions and on the hammer rest rail on upright actions. Clark, let me know if you still need a drawing of the "Hickman". His action was refereed to by others as a " Articulated-jack action". One big difference in this action was that all parts from the key up is connected and move as a single unit except the hammer shank and hammer. It has a regular back check. In the Turbo-Charge class I give, the S-A upright action model is always a big hit. Jack Wyatt
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