Abstract: A solid state fluid sensitive switching member which utilizes fluid contained in a cavity to conduct the heat generated during high current switching operations away from the temperature-sensitive solid state elements of the switching member. A heat sinc tab thermally connected to the solids state elements is positioned in the cavity where the presence or absence of a fluid is to be monitored. When fluid is present in this cavity, the solid state elements which produce heat are in a closed circuit configuration and the heat sinc tab directly conducts heat from the heat-producing solid state members into the fluid being monitored. When no fluid is present in the monitored fluid cavity, the heat sinc potentials of such fluid are absent. However, in this configuration the solid state circuit elements are in an open circuit configuration and do not produce substantial amounts of heat, so that no heat sinc is required.

Abstract: A percussion instrument mounting apparatus for mounting a second pair of cymbals or the like to a stand used for supporting and actuating a first pair of cymbals. Frame means connectible to the upper end portion of an upstanding tube assembly of the stand includes a lower spider element slidably encircling and fixedly connectable to the tube assembly, and also a three arm upper spider element superposed in coaxial alignment with the lower spider element. Each arm means includes (a) a lower arm pivotally connected at one end to the lower spider element and with a free end extending upwardly and radially outwardly from the lower spider element, and (b) an upper arm pivotally connected at one end to the upper spider element and with a free end extending downwardly and radially outwardly from said upper spider element. The upper and lower arms are pivotally connected together at a location intermediate the ends of both arms.

Abstract: A keyboard unit for an electronic organ wherein the bed of the housing supports two adjustably mounted bearing members which are adjacent the inner sides of the respective side walls of the housing and have round holes for posts provided in the end portions of C-bars forming part of discrete pivotable carriers for tablets, switches, stops, drawbars, keys or analogous components. The components are mounted on plate-like supports which are secured to the respective C-bars by screws extending through the slots of the respective C-bars and mating nuts non-rotatably but slidably installed in the respective C-bars. The two lowermost supports carry piano type manual keyboards, and the additional support or supports carry tablets, switches, drawbars or the like.