Abstract: The present invention provides a sleeve mounted to an end or both ends of a shaft of the drum pedal. A T shaped screw cap runs through the sleeve and joins to a threaded rod, which in turn is connected to an end of an elastic element. The other end of the elastic element is hooked to the lower end of a column. The screw cap allows convenient and easy adjustment to the length of the elastic element and, therefore, the force of exertion when pressing down the pedal board. The drummer may fine-tune the drum pedal any time during the performance to suit his/her desire and for the best performance.

Abstract: An anti-rotation counterhoop-fixing structure is provided for a drum, which realizes secured and reliable fastening of the counterhoop, wherein a fastening end face of a drum-fastening screw and a fastening face of the counterhoop are respectively provided with roughened anti-skidding patterned surfaces so that when the screw is tightened for fastening, the anti-patterns provided on the mated fastening faces effectively prevent the threaded engagement from getting loosened when the drum is beaten or batted. Thus, secured and reliable adjustment and fastening of the drum skin can be realized, which maintains perfect and intact sound of drum beating and facilitates convenience and practicability of operation and use of music instrument percussion.

Abstract: A drum fitted with drum heads features easy adjustment and variation of low-pitched sound. The drum head is formed with one or more openings to which surrounds made of material the same as or different than the drum head itself is attached for an independent and localized vibration area. Alternatively, the drum head is formed with a successively corrugated local area that offers localized deformation of the drum head. Either one of the constructions of the drum head provides the drum head with an independent and resiliently deformable local surface whereby when the drum is struck, the air contained inside the drum is pressurized to cause the vibration of the independent local surface, effectively increasing the vibration amplitude of the local surface on the drum head and thus extending the sound of the drum to a lower level.

Abstract: A drum fitted with drum heads features easy adjustment and variation of low-pitched sound. The drum head is formed with one or more openings to which surrounds made of material the same as or different than the drum head itself is attached for an independent and localized vibration area. Alternatively, the drum head is formed with a successively corrugated local area that offers localized deformation of the drum head. Either one of the constructions of the drum head provides the drum head with an independent and resiliently deformable local surface whereby when the drum is struck, the air contained inside the drum is pressurized to cause the vibration of the independent local surface, effectively increasing the vibration amplitude of the local surface on the drum head and thus extending the sound of the drum to a lower level.

Abstract: The telescopic support device contains a number of tubular segments cascaded together by a number of intermediate segments. Each tubular segment has an outward bulge formed along a top aperture. A flat and rigid spacer is positioned in the bulge. Each intermediate segment has a cylindrical body with a C-shaped cross section and a socket besides a top aperture of the body. A curved plastic piece is positioned between the socket and the body of the intermediate segment. When each intermediate segment has its body threaded into a tubular segment, and another tubular segment is threaded into the intermediate segment, a bolt could be screwed through the socket, the bulge, and then against the spacer. The spacer in turn pushes the plastic piece so as to lock the inner tubular segment.

Abstract: A clipping device for a drum counterhoop is disclosed. The clipping device is substantially a C-shaped body with an inner edge bottom pivotally mounted to an actuating board frame, the middle section of the board frame is a screw rod protruded out to the C-shaped body to control simultaneously an actuating at the external end of the actuating board frame such that the actuating plate is conveniently pivotally mounted to the counterhoop of the drum, the external edge of the C-shaped body is disposed with a securing seat and the upper section of the seat body is pivotally locked with a fastening cap, in combination with the urging of the locking rod of a locking device, a frame insertion module for mounting musical components is inserted into the securing seat and is locked.

Abstract: A method for manufacturing a metal plug. The method includes the steps of providing a substrate having an insulation layer thereon, and then forming an opening in the insulation layer. Next, a conformal barrier layer is formed over the insulation layer and the sidewalls of the opening, and then metal is deposited to fill the opening and cover the barrier layer. Thereafter, the metallic layer above the barrier layer is etched back so that a metal plug is formed inside the opening. Finally, a chemical-mechanical polishing operation is carried out using the insulation layer as a polishing stop. A low polishing speed is used in the polishing operation so that a highly planar metal plug surface is obtained.

Abstract: An insulating layer is formed on a semiconductor wafer. A titanium layer (Ti) is formed on the insulating layer. A titanium nitride (TiN) layer is formed on the Ti layer to act as a barrier layer. A tungsten (W) layer is deposited by using chemical vapor deposition. The tungsten layer is etched back to form a tungsten plug. While the wafer is still in the etching chamber, an in situ plans sputtering is performed to remove any fluorine contamination.

Abstract: A type of adjustment for snare drum, comprising a main unit to be fitted to the shell of a snare drum, an adjusting lever inside the main unit and a moving piece inside the main unit, which will move linearly in the main unit with the rotation of the adjusting rod in the main unit, for the purpose to adjust the snare tension; the entire adjustment composition is simplified, to save time and reduce costs in its assembling process, furthermore, due to its smooth operation, there will be no noise in the adjusting process.

Abstract: An instrument holder including a horizontal mount at a top of a vertical shaft, the horizontal mount having a threaded upright rod and a radially toothed annular block around the threaded upright rod, a swivel holder turned horizontally about the threaded upright rod and supported on a compression spring and adapted to holding a musical instrument, and a wing nut screwed up with the threaded upright rod to fix the swivel holder at the desired angle.