Abstract: In a paper machine having a roll rotating about an axis extending in a cross machine direction, and having a doctor blade applied to the roll surface by a blade holder parallel to the axis and carried on a doctor back, an apparatus is provided for accommodating relative movement between the blade holder and the doctor back in the cross machine direction during mounting and removal of the blade holder. The apparatus comprises a rail fixed to the doctor back and extending longitudinally in the cross machine direction. A groove extends along the length of the guide rail. The groove has a bottom, a width measured between confronting sides, and a top defined by ledges projecting inwardly from the sides, with inner edges spaced one from the other to define a slot that underlies the blade holder and has a width narrower than the width of the groove. A plurality of shafts are spaced along the length of the blade holder and project downwardly through the slot and into the groove.

Abstract: A pulse-width-modulated DC-DC converter provides an output signal that is feedback to an error amplifier. The converter includes a comparator for comparing the output voltage of the error amplifier with the output voltage of a compensated ramp generator and having its output coupled to a switching transistor. The compensated ramp generator is designed so that the signal proportional to the current (IDrossel) through an inductor is superimposed on the ramp voltage so as to generate an output voltage having a sawtooth waveform with a concave rise.

Abstract: An above deck unit for an AIS (automatic identification system) is externally installed on a ship. The above deck unit includes a radio circuit and an associated antenna for transmitting and receiving a message, a position detector and an associated antenna, associated controller and power supply, and a container for storing these elements. An inboard transmission path, e.g., a cable, connects the outdoor unit for the AIS and an AIS display serving as an interface means for the crew. A signal to be transmitted through the inboard transmission path is a processed, for example, an amplified signal, rather than an unprocessed output of a VHF antenna. Therefore, problems of signal loss or degradation along the inboard transmission path are unlikely to occur. Because the unit is incorporated within a single container, it can easily be installed and transferred. With this antenna complex, it is also possible to suppress interference between antennas.

Abstract: An apparatus and method of measuring the gap between one substantially planar object, such as a mask, and a second planar object, such as a substrate. The invention achieves a high degree of sensitivity, accuracy, capture range, and reliability, through a novel design of a mark located only on the mask-plate. The light is inclined to the surfaces so associated optical components do not interrupt the exposing beam used in lithography. The same optics are used as for aligning overlay. Each gapping mark on the mask-plate includes one or more two-dimensional gratings, each with period constant in the incident plane, but varying in the transverse plane. When illuminated, two images are formed of each of the two-dimensional gratings, with fringes resulting from interference between paths having traveled different distances through the gap and the mask-plate as a result of successive diffractions and reflections.

Abstract: An air-conditioning device especially for ceiling placement with low build-in height and comprising at least one preferably vertically oriented heat exchanger, with substantially horizontal percolation of the room air and at least one ventilation channel for fresh air provided substantially parallel to and within a small distance from the heat exchanger, at its outlet side, a downwards open air chamber provided between the ventilation channel and the heat exchanger, and air nozzles provided in the channel side wall of the ventilation channel facing the air chamber, which are directed towards the outlet of the air chamber. The ventilation channel is provided with a preferably convex channel wall which diametrically extends substantially from the upper corner of the ventilation channel to the lower corner of the ventilation channel. The heat exchanger and the ventilation channel are arranged with a downwards, diverging open air space.

Abstract: A method for testing a Coriolis transducer having a mass adapted vibrate along a vibratory direction in a resonant structure and undergo a displacement along a sensitive axis, perpendicular to the vibration, in response to an angular rate about a mutually perpendicular rate sensing axis. In the absence of an angular rate about the rate sensing axis, forces, FTEST VIBRATORY and FTEST SENSITIVE are applied on the mass along the direction of vibration and along the sensitive axis, respectively, in a predetermined ratio, N. The output VOUT TEST of the transducer is measured in response to the forces, FTEST VIBRATORY and FTEST SENSITIVE.

Abstract: An amplifier circuit includes a first operational amplifier having an inverting input and a non-inverting input. The non-inverting input receives an input signal, and the inverting input is connected to a noise generating system. The amplifier circuit further includes a second operational amplifier having an inverting input and a non-inverting input. The non-inverting input of the second operational amplifier receives an input signal, and the inverting input is connected to a noise generating system. A differential in/out operational amplifier, in the amplifier circuit, has an inverting input connected to an output of the second operational amplifier and a non-inverting input connected to an output of the first operational amplifier. The noise generating system injects a narrow band noise into a differential amplifier with no insertion loss and mismatching along the signal path. The narrow band noise is obtained by amplifying thermal noise of an amplifier. The amplified thermal noise is bandwidth limited.

Abstract: This invention relates to a driving circuit for a liquid crystal display, comprising a plurality of dynamic controllers, each dynamic controller including the integration of an operating amplifier, a Schmitt comparator and a plurality of transistors acting as switches.

Abstract: A method for testing a Coriolis transducer having a mass adapted vibrate along a vibratory direction in a resonant structure and undergo a displacement along a sensitive axis, perpendicular to the vibration, in response to an angular rate about a mutually perpendicular rate sensing axis. In the absence of an angular rate about the rate sensing axis, forces, FTEST VIBRATORY and FTEST SENSITIVE, are applied on the mass along the direction of vibration and along the sensitive axis, respectively, in a predetermined ratio, N. The output VOUT TEST of the transducer is measured in response to the forces, FTEST VIBRATORY and FTEST SENSITIVE.

Abstract: A highly efficient channel drop filter. The filter employs a coupling element including a resonator-system between two waveguides, which contains at least two resonant modes. The resonator-system includes one or more interacting resonant cavities which in addition to being coupled to the waveguides, can also be coupled directly among themselves and indirectly among themselves via the waveguides. Each component of the coupling element can be configured or adjusted individually. The geometry and/or dielectric constant/refractive index of the resonator-system are configured so that the frequencies and decay rates of the resonant modes are made to be substantially the same. The filter can achieve 100% signal transfer between the waveguides at certain frequencies, while completely prohibiting signal transfer at other frequencies. In exemplary embodiments, the filter is configured with photonic crystals.

Abstract: An electronic transportor that allows for the resonant tunneling of electrons between guided states, such as those found in a quantum wire or a line defect in a solid, and localized states, such as those found in a quantum dot or a point defect in a solid, using lateral coupling. In some embodiments, the transporter allows electrons of different energies to be transported to different ports of associated waveguides. In other embodiments, the transportor allows electrons of different energies to be transported at different phases.

Abstract: A method and apparatus is disclosed for determining the erythrocyte sedimentation rate and hematocrit simultaneously with the centrifugation of whole blood. A centrifuge separates the whole blood into its erythrocytes and its fluid portion. A video camera measures the levels of whole blood, erythrocytes and the fluid portion of the blood and records the time of the formation of an interface between the erythrocytes and fluid portion. A monitor displays the results of the recording. Also disclosed are the method steps performed.

Abstract: This invention provides a particulate composite comprising a polyester resin, a plasticizer, and a plurality of cenospheres. The polyester resin and the plasticizer form a matrix wherein the cenospsheres are distributed nonhomogeneously in the matrix. The nonhomogenous distribution of cenospheres further comprises a continuously varying particle volume fraction along a single dimension.

Abstract: A catenary anchor leg mooring (CALM) buoy of modular construction comprises an open framework and at least one replaceable buoyancy module. The buoyancy module is mounted to the framework. The CALM buoy also comprises mooring means and fluid application means which are rotatably mounted to the framework via a two-armed turntable. The framework may comprise elongate frame members. Preferably a plurality of buoyancy modules are provided, each detachably mounted in a symmetric configuration within the framework.

Abstract: A method for reducing DC offset from a receiver signal. The method includes jointly (i.e., simultaneously) estimating such DC offset and channel impulse response, and reducing the DC offset in accordance with the estimated DC offset and the estimate of the channel impulse response.

Abstract: A positive displacement single expansion steam expander engine. Cylinder heads are fixed to the wall of the engine. A rotatable power shaft assembly has a plurality of nests. Received in each of the nests is a free-floating piston (nonengaged) having lobes which allows free movement of the pistons in the nests.

Abstract: An electret microphone circuit including an electret microphone having a field effect transistor (FET) with a gate coupled to an electret diaphragm, a drain coupled to provide audio frequency output to an audio output node, a source terminal coupled to ground, and an amplifier stage with an RLC circuit coupled to the drain for configuring the audio frequency output to desired characteristics and for obtaining microphone bias from the output node. The amplifier stage can comprise discrete transistors or integrated operational amplifiers. In another embodiment of the invention there is provided a transistor with a drain coupled to provide audio frequency output to an audio output node and for obtaining microphone bias am from said output node, a source terminal coupled to the microphone housing, and an NPN transistor current mirror stage with an RC or RLC circuit coupled to the source for configuring the audio frequency output to desired characteristics.

Abstract: A digital radio tuner signal estimator receives a digitized in-phase (I) data signal and a digitized quadrature (Q) data signal and provides an estimated amplitude gain signal and an estimated signal-to-noise ratio signal value. The signal estimator includes a symmetrical matched I data digital filter having a first I filter section that filters the received I data signal and provides a first I data signal, and a second I filter section that filters the I data signal and provides a second I data signal. The signal estimator also includes a symmetrical matched Q data digital filter having a first Q filter section that filters the received Q data signal and provides a first Q data signal, and a second Q filter section that filters the Q data signal and provides a second Q data signal. The first and second I data signals and the first and second Q data signals are processed to compute an estimated amplitude gain.