Abstract: This disclosure provides for articulation networks that result in a wider and flatter articulation range throughout the audio spectrum. Articulation networks are disclosed herein for providing a desirable articulation response profile through a gang of networks that maintain a substantially constant Q throughout the audio spectrum. A constant Q is desirable because the music/speech will not possess non-linear peaks in presence or non-linear shifts of the timbre. The articulation networks may be disposed within a networked connector.

Abstract: Disclosed herein are magnetic bearings, armatures for magnetic bearings, and methods for their production. In one embodiment, an armature is disclosed. The armature comprises a stack, having a first end and a second end, of insulating layers and coated plates disposed adjacent one another. A first compression collar is disposed at the first end, a second compression collar is disposed at the second end, and a shaft is disposed through the first and second compression collars and the stack. The coated plates comprise core plates having a coating disposed thereon, wherein the coating comprises a material selected from the group consisting of a metal, a metal alloy, a metal oxide, an intermetallic compound, a multi-phase alloy, a solid solution, and combinations comprising at least one of the foregoing. In addition, magnetic bearings and methods for assembling armatures are disclosed.

Abstract: An abradable structure is provided on an inner face of a stationary component of the rotary machine or on a rotating component. During operation of the rotary machine, operating fluid pressure biases the stationary component against the rotating component, allowing minimal clearances to be maintained between the rotating component and the stationary component resulting in reduced fluid leakage and increased efficiency of the rotary machine. During start-up, shut down, or other transient conditions of the machine, a retractable mechanism biases the stationary component away from the rotating component ensuring preservation of a plurality of teeth provided on the stationary component or the rotating component.

Abstract: A mechanical seal includes a pair of opposing seal faces, wherein at least one of the pair of seal faces comprises a multilayer coating disposed on a substrate, and wherein the multilayer coating comprises a periodic repetition of distinct layers. In another embodiment, the mechanical seal includes a pair of opposing seal faces, wherein at least one of the pair of seal faces comprises a multilayer coating disposed on a substrate, wherein the multilayer coating comprises a plurality of layers of a composite, and wherein no two adjacent layers of the composite comprise an identical ratio of composite constituents. A method includes disposing a multilayer coating on a substrate to form at least one of a pair of opposing seal faces of a mechanical seal.

Abstract: A network for altering the audio output of a system which comprises at least one series RC or RLC circuit coupled between the positive and ground conductor of a cable that is suitable for connecting an electrical musical instrument, or similar source, to an amplifier or other load. The components of the RC or RLC circuit are selected by determining the frequency at which the positive conductor's natural phase angle is 45°. Each of the RC or RLC circuits is selected to have a phase angle of ?45° at a frequency equal to or different from the frequency at which the positive conductor has a phase angle of 45° depending upon the audio effect desired. In addition, the component values of the circuits are selected such that the measured impedance of the network at all frequencies in a predetermined frequency range is equal to or greater than 0.20 M?, and the overall combined capacitance of the cable and the capacitance and/or inductance of the network does not cause the effect of audible “roll-off” in the system.

Abstract: A method for operating a compliant abradable sealing system includes biasing a radially movable sealing element to contact a mating radially fixed sealing element. The radially fixed sealing element is rotated relative to the radially movable sealing element. The radially fixed sealing element is provided on a rotor. The radially movable sealing element is provided in a stator housing. The radial movement of the movable sealing element is limited by a stopping device provided between the movable sealing element and the stator housing. A plurality of permanent sealing grooves are formed in the radially movable sealing element to form a zero-clearance labyrinth seal.

Abstract: A network for altering the audio output of a system which comprises at least one series RC or RLC circuit coupled between the positive and ground conductor of a cable that is suitable for connecting an electrical musical instrument, or similar source, to an amplifier or other load. The components of the RC or RLC circuit are selected by determining the frequency at which the positive conductor's natural phase angle is 45°. Each of the RC or RLC circuits is selected to have a phase angle of −45° at a frequency equal to or different from the frequency at which the positive conductor has a phase angle of 45° depending upon the audio effect desired. In addition, the component values of the circuits are selected such that the measured impedance of the network at all frequencies in a predetermined frequency range is equal to or greater than 0.

Abstract: A network for altering the audio output of a system which comprises at least one series RC or RLC circuit coupled between the positive and ground conductor of a cable that is suitable for connecting an electrical musical instrument, or similar source, to an amplifier or other load. The components of the RC or RLC circuit are selected by determining the frequency at which the positive conductor's natural phase angle is 45°. Each of the RC or RLC circuits is selected to have a phase angle of −45° at a frequency equal to or different from the frequency at which the positive conductor has a phase angle of 45° depending upon the audio effect desired. In addition, the component values of the circuits are selected such that the measured impedance of the network at all frequencies in a predetermined frequency range is equal to or greater than 0.

Abstract: An audio signal transmission line including capacitive and/or inductive networks connected in series or parallel with an audio transmission cable providing for increased storage of electrical energy, and thereby overcoming energy storage problems associated with previous audio signal transmission systems which create unwanted pre-emphasis of audio signals at certain frequencies.

Abstract: A configuration of audio system components, utilizing standard amplifier components, wherein the audio system remains balanced through the speaker input terminals. For each channel of the system, a preamplifier produces a balanced output signal. Two power amplifiers or similar devices are conventionally configured to accept positive and negative input signals. The negative signal output of the preamplifier is connected to the positive input terminal of one of the power amplifiers, and the positive output signal of the preamplifier is connected to the positive input terminal of the other power amplifier. The negative and ground input terminals of both power amplifiers are connected to system ground. The connections between the preamplifiers and the amplifiers may be effected by a unique cable designed for this purpose.

Abstract: An electrical connector is set forth which is suitable for connection to a conductor which includes a connector member suitable for attachment, for example by soldering or by a crimping device, to a conductor, such as a cable. The electrical connector also includes a terminal pin connectable to an electrical receptor or terminal, for example in a part of an audio system. The connector member also includes a threaded part onto which any one of several types of alternative connector units may be mounted to enable use of the same conductor and its attached connector with different types of audio system receptors or terminals. A right-angle adapter may also be used to join the electrical connector to one of the alternative connector units.

Abstract: A single-ended digital interface cable and a balanced digital interface cable having a source end and a load end for propagating audio frequency signals in a digital format is disclosed. Each of the cables comprises a fixed capacitor or a capacitor and switch network which is coupled at or near the load end of the cables for providing a fixed bandwidth or for use in selectively controlling the bandwidth of the cables and a series resistance at each end thereof to dampen ringing.

Abstract: An audio signal transmission line comprising an additional inductance inserted in series with the line and/or coupled in parallel therewith near the load end of the line for providing a low pass filter which overcomes parasitic and dielectric capacitance of the line so as to reduce audio frequency noise generated in the line by low level and low frequency audio signals. The magnitude of the inductance used may vary widely, e.g. from 20 microhenries to 1 millihenry, depending on the length of the line and the space available.

Abstract: In an audio signal transmission system having a source of audio signals and a load coupled thereto by means of a first and second transmission line, a discrete capacitor is coupled in parallel with one or both of the transmission lines. The magnitude of the capacitor is as large as stable operation of the amplifier to which it is connected will permit.

Abstract: Audio cabling includes a first conductor in conductive communication with the positive side of the source or of the load. It extends towards but terminates free of the load if it is connected to the source and free of the source if it is connected to the load. A second conductor has a first end in conductive communication with the negative side of the source or of the load. If it is connected to the source negative side it has a second end which extends towards but terminates free of the load. If it is connected to the load negative side it has a second end which extends toward but terminates free of the source. The conductors are separated from one another by a non-conductor. They are sufficiently long whereby they are in adjacent side by side relation at least along portions thereof. High frequency noise which can affect the ear's perception of audio frequency signals is reduced as are low frequency resonance effects.

Abstract: In an audio signal transmission system comprising an interface circuit is connected across the output terminals of an audio signal source or across the input terminals of an audio signal transmission cable coupled to the source. The interface circuit comprises either a discrete capacitance or a distributed capacitance in series with a discrete resistor. The value of the capacitance and the resistance in the interface circuit is chosen such that the time constant of the cable with the interface circuit produces in response to noise a signal having a frequency which is above the audio frequency spectrum but within the passband of the amplifier to which it is coupled.

Abstract: Cabling (10) is provided for interconnecting amplifier (12) having a positive side (14) and a return side (16) to a load (18) having a positive side (20) and a return side (22). The cabling comprises a first open circuited conductor (24) having a first end (26) connected to a selected one of the amplifier positive side (14) and the amplifier return side (16) and having a second end (28) extending towards and terminating free from connection to the load (18). A second open circuited conductor (30) is provided which has a first end (32) connected to a respective one of the load positive side (20) and the load return side (22), said respective one being of a different polarity than the polarity of the selected one of the amplifier positive side (14) and amplifier return side (16) to which the first open circuited conductor (24) is connected and having a second end (34) extending towards and terminating free from connection to the amplifier (12).