Abstract: The present invention relates to a tube holder for securing a tube in fixed position relative to an object. The tube holder includes an annular collar having a central annular member, a pair of end pieces, and an inflation bladder. The inflation bladder is attached to the inner annular surface of the central annular member and secured thereto in air tight relationship by the end pieces. An inflation tube is passed through the central annular member so as to be in fluid flow relationship with the inflation bladder, with its opposite end being attached to a check valve. The tube holder is used by inserting a tube through the annular collar. When the inflation bladder is deflated, the tube will slide relative to the annular collar therefore allowing positioning thereof.

Abstract: A circuit selector, particularly adapted for the control of stage lights and the like. A support frame carries a group of input buss bars that are individually connected to power sources through dimmer control devices. A load control switch corresponding to each connected buss bar is also mounted on the support frame. At least one load slider member is arranged to be repositioned and engaged with a selected one of the input buss bars while making electrical contact through a slide or guide rail for the slider member between a selected input buss bar and the corresponding load control switch. The slider member is yieldably actuated to a circuit making position and is positively latched in a retracted condition to freely move along the guide rail as it is positioned for engagement with a selected input buss bar.