Abstract: A modular electric guitar system is disclosed that includes tool-free interchangeable body components, including tool-free sides of a guitar body which may alter the instrument's overall shape, and tool-free interchangeable pickup cartridges to provide a dynamic range of instrument shape, size, and sound.

Abstract: Systems and methods for generating a sonification output for presenting information about physiological parameters such as oxygen saturation and heart rate parameters in discrete auditory events. In a preferred embodiment, each event comprises two sounds. The first is a reference sound that indicates the desired target state for the two parameters and the second indicates the actual state. Heart rate is preferably represented by amplitude modulation. Oxygen saturation is preferably represented by a timbral manipulation.

Abstract: Systems and methods for generating a sonification output for presenting information about physiological parameters such as oxygen saturation and heart rate parameters in discrete auditory events. In a preferred embodiment, each event comprises two sounds. The first is a reference sound that indicates the desired target state for the two parameters and the second indicates the actual state. Heart rate is preferably represented by amplitude modulation. Oxygen saturation is preferably represented by a timbral manipulation.

Abstract: Fuel contacting elements for gas turbines comprise high temperature alloys having a coke inhibiting layer of titanium carbide, titanium nitride, titanium boride, or mixtures thereof.

Abstract: A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into the grain boundaries of the alloy surface, which acts as a barrier between the hydrocarbon fuel and the catalytic elements in the surfaces. The method includes heating at a temperature of 1800-1850 F. for about one hour, cooling to 1525-1575 F. and holding for about four hours, and cooling to a temperature of 1375-1425 F. and holding for about 16 hours.

Abstract: Fuel contacting elements for gas turbines comprise high temperature alloys having a coke inhibiting layer of alumina thereupon.

Abstract: A method is taught for protecting hydrocarbon contacting surfaces of a gas turbine engine from carbon deposition by the application of a coating of silica.

Abstract: A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by the application of a coating of alumina thereto.

Abstract: Elements for use as protecting fuel contacting surfaces of a gas turbine engine are protected from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of nitrogen into the grain boundaries of the alloy surface, which acts as a barrier between the hydrocarbon fuel and the catalytic elements in the surfaces.

Abstract: A method is taught for protecting fuel contacting surfaces of a gas turbine engine from carbon deposition by the application of a coating of tungsten disulfide.

Abstract: A method of building a filled roll in the form of a load-carrying shaft and a stack of annular fillings sleeved upon the shaft and an end head sleeved upon the shaft at each opposite end of the stack, includes the steps: concentrating compressive forces on the end heads and the stack therebetween in the axial direction of the shaft and on axially aligned concentric loci defined on the outboard faces of the end heads and radially spaced from and circumadjacent the shaft periphery for precluding end head deformation under the applied compressive forces, the surface area of each end face inboard of the respective locus being equal to the surface area outboard thereof as figured from the area of the fillings of the stack, and with the inner end face of each end head having a negative taper at the interface of the end head and the respective end of the stack.

Abstract: A finger operated locking nut assembly for a stringed instrument is provided including a baseplate for separating and maintaining the strings over the fretboard, a locking block for pressing the strings against the baseplate and a cam action lock screw. The lock screw provides a first, unlocked position for allowing the strings to slide for tuning of the instrument and a second, locked position for maintaining the tune of the instrument during play. The preferred lock screw includes a threaded body to allow rough adjustment and a transverse head bifurcating a pivoting lever tab to define spaced cams. These cams provide spaced contact points across the block for even pressure and secure locking of the strings.

Abstract: A string locking assembly is provided for mounting on the headstock of a guitar or the like between a string nut and tuning pegs. The assembly includes a baseplate that is mounted directly to the headstock. The baseplate includes an outwardly disposed surface for supporting the guitar strings and outwardly extending posts at spaced intervals. The posts separate the individual strings and are sufficiently spaced to allow a wide range of string spacings to pass from the string nut to the tuning pegs through the assembly without interference. The assembly also includes a locking block overlying the strings and the baseplate and an associated cam action lock screw. The lock screw provides an unlocked position to allow quick tuning of the guitar and a locked position to provide clamping pressure between the locking block and the baseplate so as to prevent slippage of the strings over the string nut during play.

Abstract: A method for producing a filled calender roll comprising a load carrying shaft portion and having thereon a cover portion made of paper or cloth or the like. The cover portion is made by subjecting a great number of annular fiber material sheets fitted on the shaft portion to a very strong compression in the axial direction of the roll. The method includes the step of making the sheets oversized in diameter with respect to the diameter of the shaft portion so that there is initially, in the assembling program, a space at the interface of the shaft portion and the cover portion. After the axial compression of the fiber material and under the influence of a vacuum created at the interface, the sheets are caused to fill the void between the cover portion and the shaft portion.

Abstract: A finger operated locking nut assembly for a stringed instrument is provided including a baseplate for separating and maintaining the strings over the fretboard, a locking block for pressing the strings against the baseplate and a cam action lock screw. The lock screw provides a first, unlocked position for allowing the strings to slide for tuning of the instrument and a second, locked position for maintaining the tune of the instrument during play. The preferred lock screw includes a threaded body to allow rough adjustment and a transverse head bifurcating a pivoting lever tab to define spaced cams. These cams provide spaced contact points across the block for even pressure and secure locking of the strings.