Abstract: A moveable key lever pivot bearing system for keyboard instruments in which the pivot bearing is provided with a longitudinal slot to enable mounting the bearing over a pivot pin disposed on a balance rail mounted within the case of the instrument. The key lever, pivot pin, and balance rail all remain in fixed relationship to one another resulting in a fulcrum point change when the bearing is longitudinally shifted back and forth with respect to the pianist. Means are provided to fix the bearing at a selected longitudinal position, extension arms for example, which may be manipulated to adjust the position of the bearings.

Abstract: A moveable key lever pivot bearing system for keyboard instruments in which the pivot bearing is provided with a longitudinal slot to enable mounting the bearing over a pivot pin disposed on a balance rail mounted within the case of the instrument. The key lever, pivot pin, and balance rail all remain in fixed relationship to one another resulting in a fulcrum point change when the bearing is longitudinally shifted back and forth with respect to the pianist.

Abstract: A fitting (10) secures a vacuum hose (20) to a wand or tank of a vacuum cleaner. The hose is swivelably and pneumatically sealed within the fitting through use of a sealing surface (18) on the fitting in engagement with a flexible lip (28) at the end portion (24) of the vacuum hose. A ring (30) engageable with the fitting compresses the end portion in order to bias the flexible lip into engagement with the sealing surface. The electrical terminations including slip rings (144) are used to terminate a hose (120) with electrical conductors therein to cooperating electrical connections.

Abstract: The hose, which is particularly adapted for use with an electrically-driven vacuum cleaning apparatus, comprises a substantially air-tight, flexible tube which is pneumatically coupled between the vacuum pump and the suction head. The suction hose comprises one or more elongated strips which is or are helically wound into tubular form. In a pair of parallelly placed strips, the strip margin of the first strip is secured to an adjacent margin of the second strip at adjoining convolutions of the strips. Electrical conductors are carried by the strips within helically extending cavities formed at the edges or margins of each of the strips and are a portion of that means which electrically couples the cleaning brush to the electrical power supply.

Abstract: A housing has a threaded bore opening to an inlet and an outlet. The outlet axis is substantially perpendicular to the bore axis while the inlet axis is off-center from the bore axis. A plug in the housing bore comprises three cylindrical portions which are threaded in the housing bore and which are joined together but spaced apart by perforate cylindrical support tubes of lesser diameter than the threaded portions. A screen mesh extends about each support tube. Bores extend radially through two of the threaded cylindrical portions and only one at a time is alignable with the housing outlet, depending upon the threaded position of the plug in the housing bore. Accordingly, molten plastic material enters into the bore from the off-center housing inlet which urges the plastic material around the exterior of the screen to limit clogging and to extend screening life.