An automatically-adjusting tensioning mechanism for use in a roll-fed web media transport system, the tensioning mechanism adding tension to the web media, comprising a bracket assembly being adapted to freely pivot around a pivot axis, and first and second tensioning shoe having curved surfaces attached to the bracket assembly. The web media feeds through the tensioning mechanism in an S-shaped media path where the web media is wrapped around the first and second tensioning shoes. The pivot angle of the bracket assembly automatically adjusts in response to differences in a coefficient of friction between the web media and the tensioning shoes such that the tension in the web media has a reduced level of variability relative to configurations where the bracket assembly is held in a fixed position.

A web conveying apparatus that conveys a web, includes: a transverse position displacement detection unit that detects a transverse position displacement of the web; a transverse position correction unit that corrects a transverse position of the web by a guide roller; width detection units that detect a width size in a left-right direction of the web; and a control unit that controls the transverse position correction unit in accordance with the transverse position displacement detected by the transverse position displacement detection unit and performs feedback control to position the web in a target position. The control unit changes a correction amount in the feedback control in accordance with the width size of the web detected by the width detection units.

Provided is a web guiding apparatus capable of ensuring a smooth operation and durability against a force applied from a web even if the apparatus is used in an environment with airborne paper powder, dust and the like. The web guiding apparatus includes a rocking frame 4 rocking around an axis perpendicular to a reference surface 2s of the base 2, and a support portion 40 supporting movement of the rocking frame 4 with respect to the base 2. The support portion 40 includes a base member 41 provided on the base 2 and having a rolling surface parallel to the reference surface 2s of the base 2, and a roller 46 provided on the rocking frame 4 so as to roll on the rolling surface of the base member 41. The rolling surface of the base member 41 is formed so that an axial direction thereof intersects an arc with a rocking shaft 3 of the rocking frame 4 as a center. A width of the roller 46 is wider than a width of the rolling surface of the base member 41. The roller 46 is provided so as to move along the arc with the rocking shaft 3 of the rocking frame 4 as the center when the rocking frame 4 rocks.

A buffer store for a flat web material includes two roller registers having freely rotatable rollers movable relative to one another in a direction radial to a roller axis, thereby forming loops of the web material between the rollers, a piston-cylinder arrangement having a chamber containing a compressible medium and acting as a spring between the registers to generate web tension in the material, and a control-valve arrangement that switches between a first condition, for normal operation, and a second condition, for operation during a fault. In the first condition, the control-valve arrangement connects the cylinder chamber of the piston-cylinder arrangement to a device for providing a constant operating pressure. In the second condition, the control-valve arrangement closes the cylinder chamber of the piston-cylinder arrangement and connects it to a relief valve that relieves pressure therein to a residual pressure significantly smaller than the operating pressure.

A method of setting web tensioning in a processing machine for processing a material web, in particular in a shaftless printing machine, wherein, for the purpose of setting the web tensioning in a first web-tensioning portion, which is bounded upstream by a first clamping location and downstream by a second clamping location, the first clamping location is given a control command, and at least one clamping location which is located upstream of the first clamping location, as seen over the course of the web tensioning, and at least one clamping location which is located downstream of the second clamping location, as seen over the course of the web tensioning, are precontrolled in dependence on the first control command, where the second clamping location is not adjusted.

A dispenser for dispensing paper toweling. The dispenser including a towel support that is positionable in a first dispensing position when a drive roller rotates in a first direction, and that is positionable in a second auto-loading position when the drive roller rotates in a second direction. Rotation of the drive roller in the first and second directions automatically loading the paper toweling for subsequent dispense.

A debris sweep and dry assist device is for use with a strapping machine. The debris sweep and dry assist device is positioned between the strapping machine and an associated strap supply. The device includes a body having a strap inlet and a strap outlet and defining a strap path therethrough. The body has a first wall at about the strap inlet and a second wall at about the strap outlet. The body has a first manifold and a plurality of first branches extending between the first manifold and the first wall to provide a plurality of flow paths from the first manifold to the environs through the first branches. A compressed is gas directed into the first manifold and flows out of the first branches, and is directed onto strap material at a location at about the strap inlet.

An optical data storage device includes an optical storage tape having one or more optical storage layers. A plurality of optical pickup units reads and/or writes data to the optical storage tape. A feed reel provides the optical storage tape to the optical pickup units. A guiding wheel that guides the optical storage tape when the optical storage tape is in the vicinity of the optical pickup units during read and/or write operations. Finally, a take-up reel receives the optical storage tape from the guiding wheel.

A method is disclosed for web tension setting in a processing machine for processing a material web, in particular a shaftless printing press. In order to set the web tension in a first web tension section with a length L which is delimited upstream by a first clamping point and downstream by a second clamping point, the first clamping point is loaded with a first manipulated variable which is produced using a first element with a first transfer function G1(s) (G3), and the second clamping point is loaded with a second manipulated variable which is produced using a second element with a second transfer function G2(s) (G4), wherein c1G1(s)=−c2G2(s). Thus, it is possible to keep the speed constant even during the regulation at a fixed or variable point x within the web tension section, wherein x=|c1/(c1+c2)|L lies behind the first clamping point.

In a web printer, tension on the moving web is controlled by monitoring the tension on the web between two rollers and selectively operating an actuator driving the second roller to restore the tension to an acceptable range. The operation of the actuator includes modulating the speed at which the second roller is driven.

An amplifier receives an amplitude signal of a polar modulated signal at a base terminal of a transistor and receives a phase modulated carrier signal of the polar modulated signal at the base terminal of the transistor. The amplifier combines the amplitude signal and the phase modulated signal to produce a full complex waveform at a collector terminal of the transistor.

The present invention relates to a switched-mode power supply apparatus and a corresponding method. For an effective compensation of non-linearities caused by dead-time and voltage drops in the switching power amplifier of the apparatus, an apparatus is proposed comprising a switching power amplifier (14) for amplifying a signal supplied by an external signal source (11) and for supplying a load voltage and/or load current to a load (15), and a control unit (12; 12b) for controlling the switching of said switching power amplifier based on a timing setting, said control unit being adapted for simulating the behavior of the switching power amplifier by predicting the average load voltage and/or load current for at least two, in particular a plurality of, timing settings for a desired load voltage and/or load current based on state information about the present state of the switching power amplifier.

A radio frequency generator includes a power control module, a frequency control module and a pulse generating module. The power control module is configured to generate a power signal indicating power levels for target states of a power amplifier. The frequency control module is configured to generate a frequency signal indicating frequencies for the target states of the power amplifier. The pulse generating module is configured to (i) supply an output signal to the power amplifier, (ii) recall at least one of a latest power level or a latest frequency for one of the target states of the power amplifier, and (iii) adjust a current power level and a current frequency of the output signal from a first state to a second state based on the power signal, the frequency signal, and at least one of the latest power level and the latest frequency of the power amplifier.

Provided is a method of generating a driving signal for driving a dual mode supply modulator for a power amplifier. The method includes obtaining an envelope of a complex baseband signal to be transmitted, comparing the envelope of the complex signal with a preset threshold value, when a current envelope of the complex signal is the preset threshold value or greater or when there is a result having the preset threshold value or greater in previous N comparisons, outputting a digital board output signal configured with a first logic level through a digital-to-analog converter; and when the current envelope of the complex signal is smaller than the preset threshold value and when there is no result having the preset threshold value or greater in the previous N comparisons, outputting a digital board output signal configured with a second logic level through the digital-to-analog converter.

Disclosed are a power transmission device for a vacuum interrupter, and a vacuum breaker having the same. The device includes: a driving link coupled to an adjuster; a driven link coupled to a movable electrode of a vacuum interrupter; connection links configured to connect the driving link and the driven link with each other, and coupled to the driving link and the driven link such that an interval between the driving link and the driven link is varied; cams coupled to the connection links in a perpendicular direction; and cam guides having guide recesses for slidably coupling the cams, and configured to guide the interval between the driving link and the driven link to be changed.

A method of manufacturing a power contactor from an existing contactor having a magnetic amplifier that comprises a blowout coil and a ferromagnetic core, and an arc chute for extinguishing an arc generated by opening the existing contactor under a current load is disclosed. The method includes removing a bolt assembly from the existing contactor and at least one side plate from the existing contactor. The method also includes removing the ferromagnetic core from the existing contactor.

A sealed solenoid, magnetically operated electric power switch is suitable for use as capacitor, line and load switch operating at transmission and distribution voltages that includes no dynamically moving seals through the sealed container housing the contactor portion of the switch. The sealed solenoid switch includes a magnetically operated drive system with an actuator that magnetically couples across the container wall to avoid the use of a moving or sliding seal as part of the drive system. The sealed solenoid switch may also include a ballast resistor and resistor contact located inside the sealed container to avoid another seal as part of the ballast system. A magnetic latch holds the switch in a closed position, and a spring holds the switch in the closed position, to avoid the need for an energizing current to maintain the switch in either position.

A container has a base and walls connected to the base to define an interior space. The walls have upper edges that terminate in a plane and define an opening for access to the interior space. Wetted donnable articles are stacked within the container, each article in a flat configuration at least partially perpendicular to the opening permitting withdrawal of any one of the donnable articles through the opening in a flat configuration. Walls on opposing sides of the base of the container diverge from each other with increasing distance from the base, such that the interior space widens gradually toward the opening. Walls on other opposing sides of the base have lower portions connected to the base and upper portions connected to the lower portions by steps that lengthen the interior space abruptly.

A method for producing a continuous web of printed material for use in creating mailpieces. The continuous web has a width and a length, the length comprised of a series of attached sheets. The series of attached sheets are comprising envelope sheets and rectangular content pages. The content pages are rectangular in shape and may be oriented relative to the envelope sheets in a number of different configurations. In some configurations, two sets of content pages and/or envelope sheets can be printed across the width of the web. Sheets for forming business return envelopes may be printed in series with the content pages and envelope sheets. BREs may include individualized return addresses. A control code may be printed on one or more of the sheets for a given mailpiece, providing information for controlling assembly of the mailpiece. Two sets of sheets may be printed across the width of the web by printing content pages onto the continuous web such that two end-to-end content pages are printed across the width of the web. Positioning of mail content pages and envelope sheets for a given mailpiece may be optimized based on respective processing times determined for the system.

A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified output radio frequency signal intended to power a travelling wave tube amplifier that can be equipped with linearization means with predistortion, at least one first upstream gain control module arranged downstream of the input and one second downstream gain control module arranged downstream of the first upstream gain control module and upstream of any linearization means by predistortion. The channel amplification module also comprises an instantaneous power limiter intended to clip the peaks of the input radio frequency signals with a level exceeding a determined threshold value, the instantaneous power limiter being arranged in series between said first upstream gain control module and said second downstream gain control module.

An amplifying structure includes a main amplifier configured to amplify a first signal; and a peak amplifier configured to amplify a second signal, each of the main amplifier and the peak amplifier including, respectively, a hybrid power device, the hybrid power device including, a first power transistor die configured to amplify signals of a first frequency, and a second power transistor die configured to amplify signals of a second frequency different than the first frequency.

A power converter with positive and negative supply rail outputs for feeding a single ended class D amplifier, the converter comprising a transformer arrangement, a supply pump reduction arrangement connected between the secondary windings and the positive and negative supply rail outputs, and a boost drive mode switching arrangement. A controller is adapted to control the power converter in a negate drive mode and a boost drive mode, wherein the output voltage in the boost mode is increased by means of the transformer and the boost drive mode switching arrangement. The output voltages on the positive and negative rails can be generated at two different output voltage levels without changing the duty cycle or dead time of the control signals.

A power combiner/divider having a waveguide, a plurality of amplifiers disposed on a supporting structure, a plurality of probes, each one having a first end electrically coupled to an output of a corresponding one of the plurality of amplifiers and a second end projecting outwardly from the supporting structure and into the waveguide. The probes are disposed in a common region of the waveguide. The region has a common electric field maximum within the waveguide. A first portion of the probes proximate the sidewalls have lengths different from a second portion of the probes disposed in a region distal from the sidewalls of the waveguide. The waveguide is supported by the support structure. The power combiner is a monolithic microwave integrated circuit structure.

An apparatus is described that includes an audio power amplifier having an input and an output. An alternating-current to direct-current power converter is coupled to the audio power amplifier in a single package to supply power to the audio power amplifier.

An electronic circuit, including, a power amplifier adapted to amplify an RF signal and provide it as output from the integrated circuit; a power source that is adapted to provide an unregulated voltage to the power amplifier; a regulator adapted to provide a regulated bias voltage; a subtracter that is adapted to accept a voltage proportional to the unregulated voltage and subtract it from the bias voltage to provide a reference voltage to the power amplifier; wherein the power amplifier is adapted to use the reference voltage to adjust the output from the power amplifier so that it will provide a stable power output.

Circuitry for reducing power consumption is described. The circuitry includes a power amplifier. The circuitry also includes a predistorter coupled to the power amplifier. The circuitry further includes a power supply coupled to the power amplifier. The circuitry additionally includes a controller coupled to the power amplifier, to the predistorter and to the power supply. The controller captures a transmit signal and a feedback signal concurrently and determines a minimum bias voltage from a set of voltages and a predistortion that enable the power amplifier to produce an amplified transmit signal in accordance with a requirement.

An amplifier circuit amplifies a signal for wireless transmission. A feedback circuit, including a capacitor, is coupled to the amplifier circuit. Components of the feedback circuit are selected based on a feedback factor such that an input impedance to the amplifier circuit has a same impedance characteristic as a feedback circuit impedance of the feedback circuit.

A method of operating a switched-mode power supply (SMPS) for supplying power to a load circuit, which draws a supply current that varies with an input signal to the load circuit is disclosed. The method comprises monitoring the input signal and controlling the amount of accumulated energy transferred for consumption by the load circuit, in use, in accordance with the input signal.

One or more embodiments of the present invention pertain to an all solid-state microwave power module. The module includes a plurality of solid-state amplifiers configured to amplify a signal using a low power stage, a medium power stage, and a high power stage. The module also includes a power conditioner configured to activate a voltage sequencer (e.g., bias controller) when power is received from a power source. The voltage sequencer is configured to sequentially apply voltage to a gate of each amplifier and sequentially apply voltage to a drain of each amplifier.

A semiconductor package device comprises a radio frequency power transistor having an output port operably coupled to a single de-coupling capacitance located within the semiconductor package device. The single de-coupling capacitance is arranged to provide both high frequency decoupling and low frequency decoupling of signals output from the radio frequency power transistor.

A radio frequency system includes a power amplifier that outputs a radio frequency signal to a matching network via a transmission line between the power amplifier and the matching network. A sensor monitors the radio frequency signal and generates first sensor signals based on the radio frequency signal. A distortion module determines a first distortion value according to at least one of (i) a sinusoidal function of the first sensor signals and (ii) a cross-correlation function of the first sensor signals. A first correction circuit (i) generates a first impedance tuning value based on the first distortion value and a first predetermined value, and (ii) provides feedforward control of impedance matching performed within the matching network including outputting the first impedance tuning value to one of the power amplifier and the matching network.

A power amplifier module includes a power amplifier including a GaAs bipolar transistor having a collector, a base abutting the collector, and an emitter, the collector having a doping concentration of at least about 3×1016 cm−3 at a junction with the base, the collector also having at least a first grading in which doping concentration increases away from the base; and an RF transmission line driven by the power amplifier, the RF transmission line including a conductive layer and finish plating on the conductive layer, the finish plating including a gold layer, a palladium layer proximate the gold layer, and a diffusion barrier layer proximate the palladium layer, the diffusion barrier layer including nickel and having a thickness that is less than about the skin depth of nickel at 0.9 GHz. Other embodiments of the module are provided along with related methods and components thereof.

A power amplifier includes: first and second bias terminals to which bias voltages are respectively supplied; a first transistor having a first control terminal connected to the first bias terminal, a first terminal that is grounded, and a second terminal; a second transistor having a second control terminal connected to the second bias terminal, a third terminal connected to the second terminal, and a fourth terminal; a capacitor connected between the second control terminal and a grounding point; and a variable resistor connected in series with the capacitor, between the second control terminal and the grounding point.

Systems and methods are provided for generating an amplitude modulation signal to a switchmode power amplifier. A DC to DC switch is configured to receive a DC input voltage and to provide a DC output voltage. A low dropout regulator is configured to provide the amplitude modulation signal according to a modulation control signal received by the low dropout regulator. A control circuit is configured to establish a nominal operating power level for the power amplifier via the amplitude modulation signal and to maintain a minimum voltage difference between the DC output voltage and the low dropout regulator output. A modulator control circuit is configured to provide the modulation control signal to the low dropout regulator. The modulator control circuit provides the transition from a high amplitude to a low amplitude and a transition from the low amplitude to the high amplitude at configurable first and second slopes, respectively.

An apparatus for amplifying power is provided. The apparatus includes a supply modulator for generating a supply voltage based on an amplitude component of a transmission signal, and a power amplify module for amplifying power of the transmission signal using the supply voltage, wherein the power amplify module includes a first power amplifier and a second power amplifier, and when an output power of the transmission signal is greater than a reference power, the first power amplifier amplifies the power of the transmission signal using the supply voltage, and when the output power of the transmission signal is equal to or less than the reference power, the second power amplifier amplifies the power of the transmission signal using the supply voltage.

An automatic gain control device includes: a variable gain adjusting unit, for adjusting an input signal by a variable gain and outputting an adjustment result; an analog-digital converting unit, for performing analog-digital conversion on the adjustment result to obtain an analog-digital conversion result; and a gain determining unit, for determining a distribution status over a predetermined period of time of a maximum or a minimum of the analog-digital conversion result, comparing the distribution status with a first distribution condition, and if the distribution status meets the first distribution condition, then keeping the variable gain unchanged, otherwise changing the variable gain and determining newly a distribution status until the newly determined distribution status meets a second distribution condition which is at least as strict as the first distribution condition.

An accessory for coupling to an attachment mechanism of an oscillating power tool includes a working end, an opposite rear end, and a fitment portion adjacent the rear end portion. The fitment portion includes a generally U-shaped opening having a central portion and a rearward portion open to the rear end, and configured to receive a post of a tool clamping mechanism. The fitment portion further includes a first plurality of openings in communication with and extending radially outward from the central portion, a second plurality of openings not in communication with and positioned radially outward from the central portion. The central portion, the first plurality of openings, and the second plurality of openings are configured to couple the fitment portion to a plurality of different configurations of attachment mechanisms for oscillating power tools.

Embodiments of the present invention generally provide chamber components with enhanced thermal properties and methods of enhancing thermal properties of chamber components including bonding materials. One embodiment of the present invention provides a method for fabricating a composite structure. The method includes applying a bonding material to a first component, and converting the bonding material applied to the first component to an enhanced bonding layer by heating the bonding material to outgas volatile species from the bonding material. The outgassed volatile species accumulates to at least 0.05% in mass of the bonding material. The method further includes contacting a second component and the enhanced bonding layer to join the first and second components.

An interface between a receptacle body and an insert designed, in particular, as a tool or workpiece insert, comprises a receptacle body (2) having a cylindrical receiving bore (4), which is circumscribed by a first plane surface (6) extending at a right angle to the bore axis and in which a first cone surface (9) is arranged, said first cone surface being coaxial with the bore axis and being arranged so that its tapered end faces toward the plane surface. The insert (3) has a pin (15) that is disposed to be plugged into the receiving bore (4) and is circumscribed by a second plane surface (22). At an axial distance from the second plane surface (22), said pin has a second cone surface (22), the tapered end of said second cone surface being arranged so as to face toward the second plane surface. With the pin (15) inserted in the receiving bore (4), the two plane surfaces are in superimposed contact while the two cone surfaces (9, 22) can be biased relative to each other by limited twisting of the insert relative to the receptacle body.

A fastener holder includes a driving tool stem having a number of orifices, a driving tool shank engaged in the stem for engaging with a tool element and having a number of depressions formed in the shank, a number of bearing members engaged in the orifices of the stem for engaging with the depressions of the shank and for selectively anchoring the shank to the stem, and a barrel includes a relatively smaller segment for selectively engaging with the bearing members and for forcing the bearing members to engage into the depressions of the shank and to anchor and lock the driving shank to the stem and for allowing the driving shank and the tool element to be selectively rotated and driven by the stem.

A power tool has a driving shaft driving a working element, a fastening piece fastening the working element to the driving shaft having a projecting shaft insertable into the driving shaft, a locking assembly locking the projecting shaft in the driving shaft having a locking member wherein the locking member has a locking position for locking the projecting shaft with the driving shaft and a loosening position for loosening the projecting shaft with the driving shaft. At the locking position, the fastening piece is pressed towards an end portion of the driving shaft by an elastic component. The locking assembly further includes a movable member arranged outside of the driving shaft, the movable member having a first portion and a second portion which can be directly or indirectly mated with the locking member wherein a radial distance of the first portion relative to a shaft center of the driving shaft is unequal to that of the second portion relative to the shaft center of the driving shaft.

In a stroke-limiter equipped integral power steering apparatus, a valve body of a spring-loaded-plunger-equipped limiter valve is configured to enable a position of the valve body relative to a housing to be adjusted in a longitudinal direction of the valve body via an intermediate sleeve.

The invention relates to a method for the impregnation of a product consisting of fibrous material and formed from a continuous web (22), the method comprising at least one first step of cutting out a specific zone (24) of the continuous web (22) and at least one second step of applying an impregnation product to the specific zone (24), the first and second steps being carried out simultaneously or virtually simultaneously.

The invention relates to a welding wire feed system for feeding welding wire over a considerable distance from a remotely located wire storage spool to a welding gun through the use of straight lengths of angularly related conduit and intermediate low friction wire direction changing devices.

A welding process, such as a GMA welding process, employs a consumable electrode with the consumable electrode being oscillated back and forth over the surface of an object to which welding material is to be applied or across the gap between two pieces of metal to be welded together. At the ends of the swings of the consumable electrode an impact force is applied to the consumable electrode to interrupt its movement, thereby causing molten metal at the end of the consumable electrode from which the arc is struck to be impelled therefrom.

A carbon exchanging system for a carbon-arc weather resistance testing apparatus having a carbon drive system including a reversible motor for automatically moving upper and lower arc producing carbons toward and away from each other along a vertical line for keeping the discharge current and voltage substantially constant. The carbon exchanging system has remotely operable upper and lower carbon chucks for holding the upper and lower carbons, a carbon replacing device having a remotely operable exchanging chuck and a drive for moving the exchanging chuck along a path of movement toward and away from the upper and lower carbon chucks when they are in position on the vertical line, a shifting device for shifting the carbon drive system and the carbon replacing means relative to each other for moving the upper and lower chucks and the exchanging chuck laterally relative to the vertical line, a carbon supply adjacent the path of movement of the exchanging chuck for holding replacement carbons and moving them into position opposite a position of the exchanging chuck along the path, and a moving device for moving the exchanging chuck and the carbon supply relative to each other in a direction toward and away from each other. The system can also include a control device for automatically controlling the operation thereof.

A method and a system for supplying power to a microcontroller with a single cell. One embodiment of the present invention discloses incorporation of a power supply pump circuit with the microcontroller and their dynamic interaction. The microcontroller sends its power requirements to the power supply pump circuit and in response, the power supply pump circuit controls the operating voltage with optimal efficiency. The dynamic update of power supply pump circuit results in an efficient use of the power supply pump circuit and thus results in a reduction of the number of dry cell batteries to only a single cell. Incorporation of the microcontroller and power supply pump circuit onto a single chip reduces the pin number requirements as well as the space required on the printed circuit board.

An information handling system (IHS) employs a power fault protection circuit to protect the IHS from overvoltages which may occur on an information line from a power adapter to the IHS. The system includes a processor coupled to the protection circuit. The circuit is operative in a first mode to decouple an information line from the IHS in response to a disable command and operative in a second mode to decouple the information line from the IHS when a voltage in the information line exceeds a predetermined threshold voltage.

In general, this disclosure describes techniques for changing a sampling frequency of a digital signal. In particular, the techniques provide a more accurate way to determining a relative timing between a desired output sample and a corresponding input sample using a non-approximated integer representation of the relative timing. The relative timing between the desired output sample and corresponding input sample may be represented using a first component that identifies a latest input sample of the digital signal used to generate intermediate samples, a second component that identifies an intermediate sample, and a third component that identifies a timing difference between the desired output sample and the intermediate sample. Each of the components may be recursively updated using non-approximated integer values.

A power tool has an electric motor that includes a commutator, with which at least one commutator brush is acted upon with spring force via at least one commutator spring in the direction of a non-rotatable collector of the commutator. At least one auxiliary tool for adjusting the commutator spring is located on a component of the power tool.