98results about How to "Small and inexpensive" patented technology

An electrical waveform generator for driving an electromechanical load includes a digital signal processor connected to a waveform generator component in turn connected to an amplifier section with a filter network, the latter being connected to sensing and conditioning circuit componentry that is in turn connected to analog-to-digital converter circuitry. A digital memory stores digitized voltage and current waveform information. The processor determines a phase difference between voltage and current waveforms, compares the determined phase difference to a phase difference command and generates a phase error or correction signal. The processor also generates an amplitude error signal for inducing the amplifier section to change its output amplitude to result in a predetermined amplitude error level for a respective one of the voltage and current waveforms.

A test strip for determining the concentration of an analyte in a body fluid includes a membrane in fluid communication with a porous layer. The membrane and the porous layer are divided into compressed portions, which restrict the capillary flow of the body fluid, and uncompressed portions. The uncompressed portions are adapted to absorb and retain body fluids in excess of the amount required for operation of the test strip. The test strip may be constructed with an internal relief chamber to accommodate the uncompressed portions. A method of making the test strip by pressure and/or heat sealing individual components on a shaping die is also provided.

A repeater (200) facilitates wireless communication between a first communication device (100) and a second communication device (105) in a wireless network using a time division duplex protocol for data transmission. The repeater (200) includes a receiver (310, 315) for receiving a signal on either of at least two bi-directional communication frequencies simultaneously. A signal detector (362) is operatively coupled to the receiver (300, 310, 315) for determining if the signal is present on at least one of the two bi-directional frequencies. A frequency converter (320, 321, 323, 324, 360, 361) is for converting the signal present on one of the bi-directional frequencies to a converted signal on the other of the bi-directional frequencies. A transmitter (300, 325, 330, 335, 345, 350) is for transmitting the converted signal on the other of said bi-directional frequencies.

When a recording starting point of a color photosensitive material reaches a position on which light beams are focused by a condenser lens and a reflecting mirror, a light beam is emitted from a red organic EL element of a light source by a controller, and red image data corresponding to a plurality of lines is transferred to a DMD. In accordance with the image data, on-off control of micromirrors of the DMD is carried out, and the red light beam emitted from the light source is made incident on the DMD. When the micromirrors are on, the incident light beam is reflected toward the reflecting mirror. The light beam is focused onto a recording surface of the color photosensitive material by the condenser lens and the reflecting mirror, and red exposure is carried out. Subsequently, green exposure and blue exposure are carried out in the same way.

Method and continuously wearable noninvasive apparatus for automatically detecting a stroke's onset are invented. The method comprises measuring pulse transit time or a related hemodynamic parameter and using adaptive pattern learning and stroke identification algorithms to identify the start of a stroke attack. The algorithms are run on an embedded processor and electronics in the apparatus. The result of the identification and detection is used to generate an alarm to alert the patient, caregiver or medical professional to immediately seek further medical treatment. The method can also be applied to identify and detect other abnormal health conditions.

Devices and systems for extracting, purifying and amplifying nucleic acids, and methods for use of such devices and systems. The devices have top sections which include a plurality of syringe vessels with applicable reagent materials, as well as a channel for a specimen collection dropper. Plungers force the materials sequentially into reaction chambers in the middle sections. Once the samples are extracted and purified, they are drawn by a vacuum into PCR devices where they are subjected to denaturing, annealing and extension steps and amplified. Interrogation of flow cells provide real-time quantitative detection.

A microelectromechanical modulating magnetic sensor comprising a base; a magnetic transducer associated with the base that provides an output in response to a magnetic field; a pair of movable flux concentrators positioned to move relative to the magnetic transducer; the pair of movable flux concentrators having a region of high flux concentration between the pair of movable flux concentrators; the pair of flux concentrators moving together in tandem with the distance between the pair remaining substantially constant during movement; support structure for supporting the pair of movable flux concentrators; a power source for causing the movable flux concentrators to move at a frequency within a predetermined frequency range; whereby when the pair of movable flux concentrators is in a first position the region of high flux concentration is in a first location, and when the pair of movable flux concentrators is in a second position, the region of high flux concentration is in a second position; such that as the flux concentrators move from the first position to the second position the intensity of the flux sensed by the transducer is modulated as the region of high flux concentration approaches and recedes from the location of the transducer.

A liquid crystal display is provided with a detection range on its screen. Along right and left sides of this detection range, two mirrors are arranged as opposed to each other, and along one of sides perpendicular to the sides along which the mirrors are arranged a camera unit is arranged. The camera unit comprises a linear light sensor and a pinhole. When an arbitrary position in the detection range is pointed by a fescue, the linear light sensor detects a real image of a detection target. The linear light sensor also detects a mapped image of the detection target reflected by the mirror. Then, positional information of the real image and the mapped image of the detection target on the linear light sensor is used to obtain a two-dimensional position of the fescue in the detection range.

An object of the invention is to embody a small and inexpensive passage selector, which can be applied by commonly using an index device even if the number of detector passages is changed, and which is easy to make inspection and maintenance. The passage selector of a reactor in-core nuclear-measuring apparatus of the invention includes: a drive motor; an index device that is driven by the drive motor and that makes a rotary output of a predetermined index number; a central rotating shaft that is driven to rotate by the index device and that causes a passage selecting guide tube to be located in opposition to any detector passage; and a speed-increasing and decreasing device that is interposed between an output shaft of the index device and the central rotating shaft, and that adjusts the index number of the central rotating shaft.

An echo canceler uses an adaptive filter to remove an echo of an incoming far-end signal from an outgoing near-end signal. Filter coefficients are calculated and updated while the far-end signal is active so as to minimize the residual echo. In addition, the far-end signal and near-end signal are sampled to generate simulated far-end and near-end signals, from which substitute filter coefficients are similarly calculated while the far-end signal is silent. When the far-end signal changes from silent to active, the substitute filter coefficients are swapped in as initial values for the filter coefficients, thereby speeding up subsequent convergence of the filter coefficients without significant added computational cost.

Apparatus and a method for installing a tubular liner in a pipe, as in repair of underground sewer piping. A feeder is of flexible material, which may be similar to that of which the tubular liner is made, and is connected to an end of the tubular liner. The feeder includes a throat portion through which a quantity of inside-out tubular liner is drawn into the feeder by fluid pressure within the feeder and beyond the throat, and the tubular liner is thence urged by fluid pressure into the pipe where it is to be installed.

A surge-protected coaxial termination includes a metallic outer body, a center conductor extending through a central bore of the outer body, and a spark gap created therebetween to discharge high-voltage power surges. A pair of dielectric support insulators support the center conductor on opposite sides of the spark gap. High impedance inductive zones surround the spark gap to form a T-network low pass filter that nullifies the additional capacitance of the spark gap. An axial, carbon composition resistor is disposed inside the outer body, and inside the dielectric insulator to absorb the RF signal, and prevent its reflection. The resistor extends co-axially with the center conductor, and one end of the resistor is electrically coupled thereto. A blocking chip capacitor extends radially from the opposite end of the resistor to the grounded outer body. The opposing second end of the resistive component may protrude from the metallic outer body and related dielectric material; the DC blocking capacitor preferably extends radially between the second end of the resistive component and the metallic outer body, or to a grounding post secured thereto.

A semiconductor ring laser gyroscope includes: a semiconductor laser for emitting two lights from both end surfaces thereof; an optical fiber ring through which the two light propagate in the respective opposite directions, which, in association with the semiconductor laser, constitutes a laser resonator, and which includes a sensor coil made of an optical fiber wound in a multilayer manner; and an optical detection unit for detecting a rotational angular velocity based on beat frequencies of the two lights, wherein an expression: 2ΔF_{beat<sub2>—</sub2>max}<F_rlg≦10ΔF_{beat<sub2>—</sub2>min} is satisfied in which F_rlg=C/nL, where ΔF_{beat<sub2>—</sub2>max} and ΔF_{beat<sub2>—</sub2>min} are beat frequencies corresponding respectively to the upper and lower limits of an angular velocity measuring range, F_rlg is a ring resonance frequency, C is a light speed, n is a refractive index of the optical fiber, and L is an overall length of the optical fiber.

A Micro-Electro-Mechanical System (MEMS) and double-layer nozzle based high efficiency, lightweight, low cost, compact, portable fiber-optic connector cleaning apparatus useful for various fiber optic communications applications such as fiber optic cable plant maintenance. The double-layer nozzle design enables the delivery of compressed, filtered air and solvent to connector surfaces. A built-in MEMS pump sucks the air and solvent back to remove particles and contaminations without leaving residues and without scratching the connector surfaces. An interchangeable external needle allows the cleaner to quickly adapt to all kinds of fiber optic connectors. No disassembly is required. The connector cleaner is therefore both fast and effective at cleaning various male and female fiber optic connectors. The fiber optic connector cleaner with 3-5 cc solvent weighs less than half a pound and can be held and operated by one hand.

A label applicator with a patch antenna or in the label applicator. The antenna is able to read and/or write to an RFID tag embedded in the label as the label is being applied to an object. The antenna can write the most current information to the RFID tag as the label is being applied. The antenna also can read the RFID tag and identify failed or damaged tags so they can be disguarded.

When designing a demodulator for a DPSK-modulated signal, it is required that optical phase modulation is performed fast and the demodulator has a long lifetime. To achieve this object, a delay line interferometer inside the demodulator performs adjustment of phase difference between two split lights caused to interfere, using a first optical phase modulation unit such as a Piezo actuator and a second optical phase modulation unit such as a heating element that operates slower in modulation speed than the first optical phase modulation unit and is slower in deterioration speed.