![]() Some increase in leverage was possible with the C ♯ key, although its position in the table limited its design options. Enlarged key tables considerably increased the leverage of the B and B ♭ keys although the left-to-right push was more severe owing to the larger arc radius of the larger keys. With the adoption of articulated G ♯ key action operated by the bell key mechanisms, more leverage from the table keys became necessary. The problem could also be mitigated by angling the key touches downward towards the body off the radius of the arc, but that was only a partial solution. Minimizing the amount of left-to-right push was an objective that favored short lever action in the cluster, at the cost of leverage to gain positive action in operating the keys. The long hinge tubes were also in a position vulnerable to damage from impacts on the left side of the instrument, especially the C ♯ hinge that extended to a high post on or near the bow. Long arms to the lowermost key cups caused a tendency for them to bounce slightly upon closing. The pivots on the left side put the arcs of the key action in a direction that forced some degree of pushing left-to-right across the saxophone to operate the keys, in a weak direction of the finger away from the palm. The bell keys were the heaviest keys with the heaviest action on the saxophone and the weakest of all the fingers were tasked with operating them. Drawbacks and compromises were inherent in the old layout with the long hinges running down the lower left side of the instrument. The left hand key table had been an awkward feature of the saxophone from its earliest days. The layout solved long-standing deficiencies in those mechanisms and all modern saxophones have left hand key tables derived from this arrangement. It introduced a revolutionary new layout for the key table operating the G ♯ and low C ♯, B, and B ♭ keys. ![]() The Selmer Balanced Action saxophone was manufactured by Selmer from 1935 through 1947. Olds (the Olds Recording Model) beginning in 1950 and King Musical Instruments, with the last instruments of this type being manufactured in the early 1970s. This style of trumpet was first developed by the Henri Selmer Paris company in 1933 for Louis Armstrong, and was also famously used by Harry James, who preferred the configuration because of his long arms. Balanced action trumpets have the valve assembly set forward (170mm vs.
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