Abstract: A mobile radio frequency identification (RFID) reader system is provided. The RFID reader system includes an RFID reader. The RFID reader system further includes a primary antenna for transmitting RFID signals to acquire RFID information from RFID item tags and a secondary antenna for transmitting RFID signals to acquire RFID information from one of RFID shelf tags and RFID floor tags.

Abstract: A radio frequency identification (RFID) read antenna is provided. The RFID antenna includes an aperture board having at least one opening and a dielectric patch element spaced a distance from the aperture. The RFID antenna further includes a quadrature coupler connected to the aperture board and configured to excite the dielectric patch element to generate RFID signals.

Abstract: An apparatus includes an antenna (e.g., a monopole), a first load, and a second load. The antenna, which extends substantially along an axis, has a first end and a second end. The first load is coupled to the antenna at the first end, while the second load is coupled to the antenna between the first end and the second end. Both the first and second loads are symmetrical with reference to the axis. The apparatus is arranged to operate in at least two frequency bands, such as the AMPS band from about 824 MHz to 894 MHz and the PCS band from about 1850 MHz to 1990 MHz.

Abstract: An electronic circuit arrangement is disclosed for converting an input voltage signal having a first voltage level into an output signal having a second voltage level. An input unit is provided for inputting the input voltage signal at the first voltage level, while an output unit is arranged for outputting the output signal at the output of the electronic circuit arrangement. A threshold value comparison unit serves for comparing the first voltage level of the input signal with a switch-on threshold value. The circuit arrangement furthermore contains an input impedance changeover unit for changing over an input impedance of the circuit arrangement from a low value to a high value after a predetermined delay duration after the first voltage level of the input voltage signal exceeded the switch-on threshold value.

Abstract: An arrangement of RFID antennas, comprises a first antenna having a beam centered at a first angle right of a center point and a second antenna having a beam centered at a second angle left of the center point, where the two beams being narrower than 70 degrees. This arrangement of RFID antennas enables division of the azimuth read zone of a reader into two or more zones which can provide a highly reliable indication of direction from the processing of RF tag reads.

Abstract: An electronic circuit arrangement is disclosed for converting an input voltage signal having a first voltage level into an output signal having a second voltage level. An input unit is provided for inputting the input voltage signal at the first voltage level, while an output unit is arranged for outputting the output signal at the output of the electronic circuit arrangement. A threshold value comparison unit serves for comparing the first voltage level of the input signal with a switch-on threshold value. The circuit arrangement furthermore contains an input impedance changeover unit for changing over an input impedance of the circuit arrangement from a low value to a high value after a predetermined delay duration after the first voltage level of the input voltage signal exceeded the switch-on threshold value.

Abstract: An antenna device includes a directional antenna and a support member that supports the antenna. The support member includes one or more fixed supports on which the antenna device can be placed to provide for a desired antenna reception beam elevation angle.

Abstract: An apparatus includes an antenna (e.g., a monopole), a first load, and a second load. The antenna, which extends substantially along an axis, has a first end and a second end. The first load is coupled to the antenna at the first end, while the second load is coupled to the antenna between the first end and the second end. Both the first and second loads are symmetrical with reference to the axis. The apparatus is arranged to operate in at least two frequency bands, such as the AMPS band from about 824 MHz to 894 MHz and the PCS band from about 1850 MHz to 1990 MHz.

Abstract: An RJ jack includes a housing having an interior chamber with a plurality of contacts which are deflectable upon insertion of a plug into the chamber. A plurality of projections is provided for limiting the extent of the deflection of selected contacts. In a preferred embodiment, the RJ jack is an RJ45 and the projections are fins located beneath the outermost contacts of the RJ45 jack.

Abstract: A telecom circuit protection apparatus includes a housing having at least first and second temperature responsive circuit protection devices, such as a fuse and a thyristor disposed therein. A first metal lead is connected to respective first terminals of the first and second circuit protection devices and is structured and arranged such as to transfer heat freely between the second circuit protection device and the first circuit protection device. A second metal lead is connected to a second terminal of the first device and a third metal lead is connected to a second terminal of the second device. The first, second and third metal leads extend from the housing. Advantageously, the portions of the first, second and third metal leads extending from the housing have reduced cross-sections to reduce heat loss from the apparatus and are formed and made solderable for use as connection points for surface mount connection to the apparatus.

Abstract: An RJ jack includes a housing having an interior chamber with a plurality of contacts which are deflectable upon insertion of a plug into the chamber. A plurality of projections is provided for limiting the extent of the deflection of selected contacts. In a preferred embodiment, the RJ jack is an RJ45 and the projections are fins located beneath the outermost contacts of the RJ45 jack.

Abstract: A telecom circuit protection apparatus includes a housing having at least first and second temperature responsive circuit protection devices, such as a fuse and a thyristor disposed therein. A first metal lead is connected to respective first terminals of the first and second circuit protection devices and is structured and arranged such as to transfer heat freely between the second circuit protection device and the first circuit protection device. A second metal lead is connected to a second terminal of the first device and a third metal lead is connected to a second terminal of the second device. The first, second and third metal leads extend from the housing. Advantageously, the portions of the first, second and third metal leads extending from the housing have reduced cross-sections to reduce heat loss from the apparatus and are formed and made solderable for use as connection points for surface mount connection to the apparatus.

Abstract: A microstrip antenna capable of providing high radiation gain both at the zenith and at low angles. The microstrip antenna includes a raised ground plane disposed on a flat ground plane, a dielectric substrate disposed on the raised ground plane, a patch disposed on the dielectric substrate, a feed pin disposed through the patch, the dielectric substrate and the raised ground plane, and a dielectric lens for encapsulating at least a portion of the patch to increase the radiation gain at low angles.

Abstract: A device for detecting the short circuiting of the switches of a converter circuit arrangement is disclosed. The device is magnetically coupled to the current limiter coil and comprises a conductor loop which is preferably arranged at the end of the current limiter coil. On short circuiting, a voltage is induced in the conductor loop. This voltage is converted in a detection circuit into a voltage pulse and fed to an evaluation logic circuit. In the evaluation logic circuit, the period of the induced voltage pulse is evaluated and, if appropriate, load-relieval actuation is initiated.

Abstract: A digital input is disclosed for supplying a digital signal representing the occurrence of a special event, such as a malfunction, to a recording device. The present invention can be advantageously used in a distribution network for electrical energy, in which the special event triggers the actuation of a switch in a switchgear. The digital input has two first current terminals, to which direct current is applied from an external voltage source. Two second current terminals are connected to a sensor element, for example an auxiliary contact of the switchgear, which outputs the digital signal when the special event occurs. An electrical circuit is also connected to the two second current terminals and carries the digital signal to an optocoupler which provides electrical isolation. The digital input furthermore has a device for converting the direct current supplied from outside the device into a direct current which is electrically isolated therefrom.

Abstract: The input and/or output device for process data has a mounting rack (1), as well as a plurality of modules (2) fastened on the mounting rack (1). A process connector (4) can be inserted into each of the modules (2) on the front side in each case. Each module (2) has a circuit board (17) which is arranged in a housing (8), as well as a terminal strip (18) which is connected non-positively to the process connector (4). The terminal strip (18) serves to receive contact pins (26) which interact with contacts of the process connector (4). The input and/or output device is intended to demonstrate a high degree of operational reliability even in the case of a high level of mechanical and electromagnetic stresses.

Abstract: A multiple-mandrel ring rolling machine for producing a ring from a ring blank having a plurality of elongated mandrel rolls rotatably mounted on a rolling platform fixedly mounted to a frame for rotation relative thereto is disclosed. The mandrel rolls are axially displaceable relative to the rolling platform between a first position above the rolling platform for rolling a ring blank and a second position below the rolling platform.

Abstract: Relative shive incidence in a production flow line of paper pulp is continuously sampled and measured by means of a continuous flow, fiber induction device located within the production line to extract a diluted sample of fiber flow therein. The diluted sample is directed through a windowed conduit section for photodetection of particles therein. Particle caused pulses are discriminated by amplitude relative to a reference scale to distinguish shive particles from acceptable fiber particles. Two pulse trains are developed simultaneously: one pulse train for shive pulses and the other pulse train for particle flow including shives. Both pulse trains are rate determined by counting the number of pulses in a fixed interim of time identical to both. The two pulse rates are then combined to develop a dimensionless ratio of shive incidence or percentage within the total fiber stream.

Abstract: Relative shive incidence in a production flow line of paper pulp is continuously sampled and measured by means of a continuous flow, fiber induction device located within the production line to extract a diluted sample of fiber flow therein. The diluted sample is directed through a windowed conduit section for photodetection of particles therein. Particle caused pulses are discriminated by amplitude relative to a reference scale to distinguish shive particles from acceptable fiber particles. Two pulse trains are developed simultaneously: one pulse train for shive pulses and the other pulse train for particle flow including shives. Both pulse trains are rate determined by counting the number of pulses in a fixed interim of time identical to both. The two pulse rates are then combined to develop a dimensionless ratio of shive incidence or percentage within the total fiber stream.