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Wearable Device For Feeding and Observing Birds and Other Flying Animals
A device for feeding and observing flying animals comprising a hat, a support mounted on the hat and extending outward from the hat, and a feeder mounted on the support.
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| Number | Title | Issue Date |
| 7834643 | Systems and methods for reducing distortion in a power source using an active harmonics filter Systems and methods for reducing harmonic distortion in a power system resulting from non-linear loading on the power system. The power at an interface with a power source is measured, and then distortion in the waveforms of the supplied power is identified. Cancell... | 11/16/2010 |
| 7340184 | Linearized Optical Transmitter Using Feedback Control Apparatus and methods for linearizing an optical transmitter are described. A linearized optical transmitter according to the present invention includes a modulator bias voltage supply that biases an optical modulator. The optical modulator modulates an optical sign... | 03/04/2008 |
| 7315171 | Electronic judging apparatus for working state of the equipment The invention provides the electronic judging apparatus to detect the working state of the other electric equipment without modifying it inside. The common mode noise around the electric power supplying wires of the other equipment is measured by using the special m... | 01/01/2008 |
| 7304829 | Apparatus and method for filtering current sensor output signals An electronic filter for filtering the output signal of a current sensor of a circuit breaker is disclosed. The current sensor has an output signal characteristic similar to that of a Rogowski coil output signal characteristic that includes a third harmonic noise co... | 12/04/2007 |
| 7282921 | System, apparatus and method for detection of electrical faults System for monitoring an electrical system of a facility includes one or more local sensing devices, each of which is adapted to be connected to the electrical system of the facility in proximity to a respective load that receives power from the electrical system so... | 10/16/2007 |
| 7268530 | Method to measure the mutual phase relationship of a set of spectral components generated by a signal generator A novel method is described that enables the measurement of the phase of the spectral components generated by an harmonic phase reference generator without using a calibrated sampling oscilloscope. First one uses a vector network analyzer to measure the output refle... | 09/11/2007 |
| 7253634 | Generator protection methods and systems self-tuning to a plurality of characteristics of a machine A method for detecting stator ground faults in a generator is described. The method includes receiving a neutral voltage signal from a neutral point of a stator, receiving a plurality of terminal voltage and current signals from the stator, deriving a magnitude of a... | 08/07/2007 |
| 7222034 | In-circuit measurement of saturation flux density Bsat, coercivity Hc, and permiability of magnetic components using a digital storage oscilloscope An oscilloscope performs an in-circuit measurement of voltage across, and current through, a core winding of an inductor, and derives the actual B and H values with n number of turns, receives data indicative of the magnetic length of the circuit, and plots the B_H ... | 05/22/2007 |
| 7215252 | Proximity sensor A proximity sensor includes an antenna having a resonant frequency selected to correspond to a resonant frequency associated with a selected dimension of an item of interest. In one example, the antenna is selected to have a resonant frequency corresponding to a res... | 05/08/2007 |
| 7180301 | Power monitor-glitch trap system A device for sensing and capturing the state of a direct current electrical power line comprising a voltage comparator having a pair of inputs, one of the inputs adapted to be connected to the power line, the other input connected to an analog and digital I/O module... | 02/20/2007 |
| 7154254 | Apparatus and method for improving electromagnetic compatibility A method and apparatus for providing improved electromagnetic compatibility between a power source (20) and a switching element (22) in a switched mode power supply includes a device (24) for measuring an electrical variable, for example current... | 12/26/2006 |
| 7148702 | VNA and method for addressing transmission line effects in VNA measurement data In one embodiment, a vector network analyzer (VNA) comprises a plurality of ports for coupling to a device under test (DUT), at least one reference receiver for measuring signals associated with the DUT, and logic for processing measurement data from the at least on... | 12/12/2006 |
| 7088109 | Method and apparatus for measuring a digital device A method and apparatus for characterizing a non-linear device stimulates the device with a repetitive digital signal and uses relative phase measurements made with a vector network analyzer to measure the device response to the digital stimulus. ... | 08/08/2006 |
| 7075288 | System and method for acquiring voltages and measuring voltage into and electrical service using a non-active current transformer A voltage acquisition circuit for sensing input voltage signals in each phase of an electrical service includes a non-active current transformer configuration that is operable over a wide input voltage range. The current transformer configuration includes primary an... | 07/11/2006 |
| 7061254 | Power calibration for multi-port vector network analyzer (VNA) A power calibration method for a multi-port vector network analyzer (VNA) performs a two-port S-parameter calibration between a pair of ports of the multi-port VNA, and performs a power calibration of one of the ports in the pair of ports. From the two-port S-parame... | 06/13/2006 |
| 7038468 | Method and a test setup for measuring large-signal S-parameters that include the coefficients relating to the conjugate of the incident waves The values of the 6 complex parameters of a large-signal S-parameter model of a high frequency device-under-test are determined by using a frequency-offset probe-tone method. A relatively large one tone signal is applied to the input port of the device and a relativ... | 05/02/2006 |
| 7013227 | System and method for determining harmonic contributions from non-linear loads A system and method for determining harmonics caused by non-linear loads are disclosed. Briefly described, one embodiment is a method comprising metering voltage on an electric power system; metering current on the electric power system; determining a predicted curr... | 03/14/2006 |
| 6973138 | Advanced adaptive pre-distortion in a radio frequency transmitter The present invention is related to methods and apparatus that advantageously permit the more efficient use of an input range of an analog-to-digital converter used by an adaptive predistortion linearized RF transmitter. A main signal component of a down-converted o... | 12/06/2005 |
| 6934515 | Electromagnetic radiation alerting device for use with a cellular telephone A personal radiation-alerting device for use with a cellular telephone is provided. The radiation alerting device may comprise a radio frequency (RF) sampling unit adapted to measure the amplitude of the electromagnetic field generated by the cellular telephone over... | 08/23/2005 |
| 6917204 | Addition of power at selected harmonics of plasma processor drive frequency A method for controlling the non-uniformities of plasma-processed semiconductor wafers by supplying the plasma with two electrical signals: a primary electrical signal that is used to excite the plasma, and a supplemental electrical signal. The supplemental signal m... | 07/12/2005 |
| 6909292 | Method for suppressing even order harmonics in a device that utilizes transconductors A method for calibrating a low pass filter is disclosed. The low pass filter comprises a plurality of transconductor cells. The method comprises generating a test signal to the low pass filter and suppressing even-order harmonics due to transistor mismatches within ... | 06/21/2005 |
| 6904381 | Testing of a frequency converter device A user interface is presented for a tester that tests a frequency converter having an input port, an output port and a local oscillator port. In a first area, a user can specify frequency for an input signal to be placed on the input port. In a second area, the user... | 06/07/2005 |
| 6861846 | Distortion measurements with a vector network analyzer A distortion measurement method uses alternative measurements to determine the distortion of a DUT, depending on the ratio of the distortion at an output of the DUT to distortion of a source stimulating the DUT. The method includes calibrating the VNA at a distortio... | 03/01/2005 |
| 6798306 | High-frequency oscillation circuit and measuring device A high-frequency oscillation circuit incorporates a crystal resonator having a natural oscillation frequency in a high-frequency area within a closed circuit including one or more logic elements. Therefore, this circuit copes with an oscillation frequency of 1 MHz t... | 09/28/2004 |
| 6601002 | Arrangements to detect and respond to disturbances in electrical power systems A control arrangement and method is provided for detecting and responding to disturbances in electrical power systems. In a preferred arrangement, an integration is initiated that is based on a comparison of actual voltage of a source and a reference volt... | 07/29/2003 |
| 6559654 | Method and system for automatic determination of inductance A method and system for determining an inductance value of an inductive element are presented. The method includes energizing the inductive element using an N-pulse AC to DC converter in electrical communication with the inductive element and an AC source... | 05/06/2003 |
| 6535785 | System and method for monitoring and controlling gas plasma processes A system and method for monitoring the conditions in a gas plasma processing system while varying or modulating the RF power supplied to the system, so that resulting signals of the electrical circuits of the system provide information regarding operation... | 03/18/2003 |
| 6396287 | Process for measuring output harmonic relative to output fundamental with enhanced accuracy A method is provided for eliminating the source harmonic component from VNA measurements of the output of a device under test (DUT). A standard vector measurement, GHx, is first measured from the DUT using the VNA. The value GHx is composed of two element... | 05/28/2002 |
| 6351683 | System and method for monitoring and controlling gas plasma processes A system and method for monitoring the conditions in a gas plasma processing system while varying or modulating the RF power supplied to the system, so that resulting signals of the electrical circuits of the system provide information regarding operation... | 02/26/2002 |
| 6326796 | Harmonic measuring method and a current injection device for harmonic measurement A harmonic injection point a is set on a power line extending downstream from a harmonic measuring point b in an electric power system. The currents of interharmonics are injected to the harmonic injection point a by a current injection device. The freque... | 12/04/2001 |
| 6320392 | Active filter device An active filter device provided for compensating harmonic distortion in a supply line by injecting for each harmonic (fk) to be considered a compensation current. The compensation current being determined by injecting a monitoring current on t... | 11/20/2001 |
| 6316945 | Process for harmonic measurement accuracy enhancement A method for determining the harmonic response of a device under test (DUT) to the input fundamental frequency component of an input signal is performed on a vector network analyzer. A first response of the DUT at the harmonic frequency is obtained by mea... | 11/13/2001 |
| 6292000 | Process for harmonic measurement with enhanced phase accuracy A method for determining the harmonic phase response .angle.POx of a device under test (DUT) is performed on a vector network analyzer (VNA). The phase .angle.GN1 of the transfer response GN1 of the DUT at the fundamental frequency is determined from VNA ... | 09/18/2001 |
| 6275050 | Apparatus and method to detect corrosion in metal junctions Apparatus and method to detect corrosion in metal junctions. Corroded metal junctions are usually discovered by visual inspection. The present invention detects corrosion in metal junctions when it is not visually apparent. A corroded metal junction acts ... | 08/14/2001 |
| 6255830 | Method of testing shielding effectiveness and electromagnetic field generator for use in testing shielding effectiveness An electromagnetic field generator is provided which consists of a regulated self contained voltage supply connected to a high frequency clock which drives one or more printed circuit board antennas. The clock may be a TTL or ECL based clock for example. ... | 07/03/2001 |
| 6229315 | Hand-held harmonics detector A device for detecting harmonics in a current carrying conductor, comprises current probe for placing adjacent a current carrying conductor, the current probe generating an output signal in response to the current in the conductor; a circuit operably conn... | 05/08/2001 |
| 6215316 | Method and apparatus for measuring harmonic current sources in electric power distribution systems A method and apparatus provides a technique for measuring characteristics of a harmonic pollution source connected to an alternating current power distribution system. The apparatus has a harmonic current meter and a harmonic voltage meter. Also, the appa... | 04/10/2001 |
| 6208945 | Harmonic component measuring method for power system Frequencies fx between the measurement harmonic (mth-degree harmonic) and the (m&#b1;1)th-degree harmonics are determined from an expression of fx=(fs*m)&#b1;{(fs/n)*k)} where n and k are each an integer. Currents of inter-harmonics of the frequencies fx ... | 03/27/2001 |
| 6182017 | Method and apparatus for differentiating contributions of harmonic pollution sources A method of determining parameters of a harmonic pollution source connected to a power line at a connection point. The harmonic pollution source is a power customer and the power is supplied by an electric utility. The electric utility is also a source of... | 01/30/2001 |
| 6154037 | System and method for testing distortion in transformers The present invention entails a circuit and method for determining the distortion created by a transformer used in data communications. The circuit according to the present invention comprises a transmitting circuit, a back matching circuit, and a subtrac... | 11/28/2000 |
