A quantum information processing system includes a waveguide having an aperture, a non-linear quantum circuit disposed in the waveguide and an electromagnetic control signal source coupled to the aperture.

The disclosure relates generally to sequential state elements (SSEs), triple-mode redundant state machines (TMRSMs), and methods and systems for testing triple-mode redundant pipeline stages (TMRPSs) within the TMRSMs using triple-mode redundant SSEs (TMRSSEs). The SSEs, TMRSMs, TMRPSs, and TMRSSEs may be formed as integrated circuits on a semiconductor substrate. Of particular focus in this disclosure are SSEs used to sample and hold bit states. Embodiments of the SSEs have a self-correcting mechanism to protect against radiation-induced soft errors. The SSE may be provided in a pipeline circuit of a TMRSM to receive and store a bit state of a bit signal generated by combinational circuits within the pipeline circuit. More specifically, the SSEs may be provided in a TMRSSE configured to perform self-correction. Also disclosed are methods for using the TMRSSE to test redundant pipeline stages of the TMRSM.

A resonant clock distribution network architecture is proposed that enables a resonant clock network to track the impact of parameter variations on the insertion delay of a conventional clock distribution network, thus limiting clock skew between the two networks and yielding increased performance. Such a network is generally applicable to semiconductor devices with various clock frequencies, and high-performance and low-power clocking requirements such as microprocessors, ASICs, and SOCs.

This invention relates to a vehicle comprising an antihydroplaning system, particularly for improving the wheel adhesion despite the presence of a sheet of water on the road. Output signals from sensors for detecting body and chassis vibrations, ambient temperature and other parameters are analyzed to determine when hydroplaning is occurring or about to occur, and to activate antihydroplaning measures.

An anti-hydroplane system for tires that includes a blower assembly in front of each of the tires of a vehicle. Each blower assembly discharges a high pressure stream into a water dispersal area in front of a respective one of the vehicle tires.

An antislip material ejector comprises an antislip material container 12 which stores antislip material, an air inlet pipe 13 which is arranged in the antislip material container, a compressed air supply pipe 14 which supplies compressed air to the air inlet pipe, a nozzle portion 16 which is arranged in the air inlet pipe, a mixing pipe 17, which is connected with the air inlet pipe, in which the antislip materials are mixed with air and in which a suction hole 18 is formed through which the antislip material passes, a connecting pipe, one end of which communicates with the mixing pipe and the other end of which communicates with a cavity in the antislip material container, and an ejection pipe 20 which is connected with the mixing pipe and which ejects the antislip material together with the compressed air.

The invention relates to a rail clamp for fastening rail equipment, said rail clamp being integrally composed of a polymeric composition produced by pultrusion or molding, vacuum molding or compression molding. It has high mechanical strength. It is anticorrosive and insulating and is preferably composed of a resin and reinforcing fibers and/or a thermoplastic. It is advantageously formed as a one piece structure. The rail clamp is especially used to fasten rails to base slabs and has economic advantages compared to the rail clamps known in the art, which are made of steel coated with rubber.

A ballast anti-flight sleeper characterized by having on the upper face two surfaces endowed with sufficient inclination as to prevent the accumulation of ballast over this side of the sleeper, with this geometric topology being the main claim; the fundamental elements in the same figure: track (1), ballast anti-flight sleeper (2), ballast (3) and the elements to anchor and secure the track (4).

An anti-theft system for securing a removable battery to a power tool. The system employs a tamper-proof retainer to ensure that the retail display of a combined power tool and its associated battery can be displayed as a single unit without fear of theft of the battery. This may be achieved by the tamper-proof retainer securing a battery release latch against its release position hence securing the battery to the tool in a manner preventing the removal of the battery by a potential thief. The tamper-proof retainer either prevents removal of the battery from the power tool, as removal of the tamper-proof retainer is impossible, or, if it is destroyed by a thief, then it permanently secures the battery to the power tool.

An anti-ligature door latch assembly comprises a door latch, an escutcheon, and an anti-ligature handle mounted to the escutcheon for movement along a guided linear path between a default non-operative position and an operative latch-retracting position. The anti-ligature handle includes a shroud that maintains contact with the escutcheon regardless of the position of the handle on the escutcheon and covers a linear slot in the escutcheon along which the handle rides. The anti-ligature door latch assembly is suitable for both mortise and tubular latch assemblies. The escutcheon and a back plate mounted to the door surface houses an activator plate that moves linearly with the handle. The activator plate has a cam surface that, when in the operative latch-retraction position, contacts a cooperating part of a spindle-mounted rotary hub, causing the spindle to rotate and retract the latch.

An imaging apparatus having a ring-shaped gantry is provided. The gantry has a rotor arrangement rotating therein and a radiation source as well as at least one radiation detector. The gantry has at least one gantry segment which can be detached from the ring shape to allow the gantry to be opened laterally. The gantry is arranged on a supporting structure so as to be movable in space. The supporting structure is a ceiling-mounted stand having at least two degrees of freedom of movement. The gantry has at least two radiation sources disposed offset by an angle on the rotor arrangement and associated with each of which is at least one radiation detector.

A method is disclosed for energy calibrating quantum-counting x-ray detectors in an x-ray installation including at least two x-ray systems turnable around a center of rotation. A target, for producing x-ray fluorescence radiation, is positioned between the first x-ray source and first x-ray detector and irradiated with x-radiation of the first x-ray source in such a way that x-ray fluorescence radiation which strikes the second x-ray detector from the target is produced by the x-radiation of the first x-ray source. The second x-ray detector is then energy calibrated by way of the x-ray fluorescence radiation of the target. The first x-ray detector can be energy calibrated in the same way with the aid of the x-radiation of the second x-ray source. With the proposed method, the x-ray detectors of a dual-source CT x-ray installation can be calibrated with little expenditure under conditions close to those of the system.

A method and system are presented to address quantitative assessment of visual motor response in a subject, where the method comprises the steps of: (1) presenting at least one scene to a subject on a display; (2) modulating the contrast of a predetermined section of the scene; (3) moving the predetermined section relative to the scene with the movement being tracked by the subject via at least one input device; (4) measuring a kinematic parameter of the tracked movement; (5) quantitatively refining the tracked movement; (6) determining the relationship between at least one of the scene and the quantitatively refined tracked movement; (7) adjusting the modulated contrast relative to the quantitatively refined tracked movement; (8) calculating a critical threshold parameter for the subject; and (9) recording a critical threshold parameter onto a tangible computer readable medium.

A method and system are presented to address quantitative assessment of word recognition sensitivity of a subject, where the method comprises the steps of: (1) presenting at least one scene, comprising a plurality of letters and a background, to a subject on a display; (2) moving the plurality of letters relative to the scene; (3) receiving feedback from the subject via at least one; (4) quantitatively refining the received feedback; (5) modulating the saliency of the plurality of letters relative to accuracy of the quantitatively refined feedback; (6) calculating a critical threshold parameter; and (7) recording a critical threshold parameter onto a tangible computer readable medium.

A method that utilizes software and hardware mechanisms to meet the FCC requirement for a U-NII antenna to be an integral part of the device in which it operates, while providing wireless ready U-NII devices and CRUable U-NII radios. Enhancements are made to the software BIOS, including the inclusion of a table of approved radio-antenna PCI ID pairs to create an authentication scheme that verifies and authenticates the radio and antenna combination as being an FCC-approved unique coupling during boot-up of the system. The BIOS also comprises an OEM field that stores an encrypted secret key utilized to complete a second check of the radio model placed in the device. During boot up of the device, the PCI ID pairs from the BIOS are compared against the PCI ID of the radio and the secret key is checked against the radio model. Only a system with an approved combination of radio and antenna is allowed to complete the boot process, indicating an FCC approved device-antenna-radio combination under the “integral” requirement.

The disclosure provides a method and device for retransmitting data under antenna gain imbalance, and the method includes: determining that gains of multiple antennas at a transmission terminal are imbalanced; using a better spatial sub-channel in the multiple antennas to retransmit data when streams transmitted by the multiple antennas adopt a same Modulation and Coding Scheme; and using a better spatial sub-channel in the multiple antennas to retransmit data and/or using a single-stream approach to retransmit data when the streams transmitted by the multiple antennas adopt different Modulation and Coding Schemes. The disclosure selects a corresponding retransmission approach according to the condition of a spatial sub-channel on which streams have an error, thus improving and ensuring success rate for retransmitting a stream.

Various embodiments associated with an at least fourth-order cumulant of a signal are described. The at least fourth-order noise-insensitive cumulant of the signal can be taken and compared against an at least fourth-order noise-insensitive cumulant of known signals. A match can be found between the signal and a known signal and from this match, a demodulation scheme of the signal can be determined. The demodulation scheme can be used to demodulate the signal.

Protective garments include a flame resistant fabric that is strong and yet has a soft hand. The fabric is made from a combination of filament yarns and spun yarns. The filament yarns and spun yarns are woven together such that the filament yarns are separated by from about 2 to about 5 spun yarns in both the warp direction and the fill direction. The spun yarns may contain polybenzimidazole fibers in combination with other fibers, such as aramid fibers. The filament yarns may comprise para-aramid fibers. In one embodiment, the filament yarns may have a size larger than the spun yarns.

An implantable graft device having treated yarn is disclosed. The device comprises a graft body forming a lumen defining a longitudinal axis and comprising proximal and distal ends. The graft body comprises a woven fabric having warp yarns aligned in a first direction and a weft yarns aligned in a second direction. At least one of the weft yarns and the warp yarns has an agent applied thereto defining treated yarns of the graft body.

A textile sleeve for routing and protecting elongate members and method of construction thereof is provided. The sleeve includes an elongate wall having opposite edges extending parallel to a central axis of the sleeve. The wall is woven with warp yarns extending parallel to the axis and fill yarns extending transverse to the warp yarns. The warp yarns include monofilament yarns within an intermediate region of the wall and multifilament yarns within opposite edge regions of the wall to enhance abrasion resistance and curl, respectively, and the fill yarns include monofilament yarns larger in diameter than the fill monofilament yarns to provide further abrasion resistance, enhanced curl strength and multifilament yarns to provide increased coverage, maintain flexibility, and to maintain the warp monofilaments in their intended position.

A fault tolerant electrical machine including: a plurality of phases; a detector arranged to detect a fault in at least one of the phases; and a controller arranged to intentionally cause a fault in at least one other of the phases such that the vector sum of the second harmonic power vectors of the remaining phases is zero.

A wind energy plant comprising a rotor having blades and a generator driven by said rotor for generating electric energy. The pitch of the blades can be adjusted and a pitch system for adjusting the pitch angle of the blades is provided, which is supplied by a hub power source. An additional electric load is provided on the hub. A pitch power control device is provided which dynamically distributes the power of the hub power source between the pitch system and the additional electric load and further acts on the pitch system such that its power consumption during high-load operation is reduced. Thus, the power consumption of the pitch system during high-load operation can be reduced and additional power provided for operating the additional load. Even large additional loads, such as a blade heater, can be operated in this way, without having to boost the hub power source.

Controlling a power system in a mining truck includes receiving data indicative of an expected change in suitability of the mining truck for on-trolley operation, and outputting a control command to an actuating mechanism for a pantograph responsive to the data and prior to occurrence of the expected suitability change. A mining truck and power system are further provided, wherein a pantograph having an electrical contactor is adjusted between a first configuration contacting an overhead trolley line, and a rest configuration, responsive to data indicative of the expected suitability change.

A pantograph assembly configured to transfer electrical power from an overhead conductor to a machine. The pantograph assembly includes a pantograph support detachably connected to the machine, an articulated assembly, a pan rail and a carbon brush. The pantograph support includes a first link, and a second link hingedly connected to the first link. The first link is connected to the pantograph support. The pan rail is supported by the second link of the articulated assembly. The carbon brush is supported by the pan rail along a longitudinal axis of the pan rail. The pantograph assembly further includes an end horn having a bridge portion connected to the carbon brush. The bridge portion is configured to transfer the overhead conductor between the end horn and the carbon brush.

A dynamic supplemental downforce control system for a planter row unit. The system includes closed-loop feedback circuit that cooperates with a downforce actuator to dynamically control fluid flow to the downforce actuator to maintain balance between the actual gauge wheel downforce and a desired gauge wheel downforce during planting operations.

A seeding machine, such as a row crop planter, is described which is adapted to switch between two or more seed varieties as the machine traverses a field. The control system uses a programmed quantity of seed representing a number of seeds in the seed meter that need to be substantially consumed once the flow of a first seed variety is stopped before introducing a second seed variety to minimize seed mixing. The seed quantity can be determined by a calibration process or published from the manufacturer or third parties. The seed quantity can also be part of a seeding prescription that includes assignment of where each seed variety is to be planted in a field. The seed quantity and the distance traveled to empty the meter can be used to optimize the planting operation including the machine direction which can also be part of the prescription.

A seed research plot planter includes a rotating seed plate for picking up and transporting seeds from a seed chamber to a release point, and a sensor that detects the rotational position of the seed plate. A distance measuring device measures a distance traveled by the planter. A controller uses a first signal from the sensor and a second signal from the distance measuring device to control a sequence of operations of the planter based on the rotational position of the seed plate and the location of the planter within the field. A field layout system is provided for creating a plot field layout having a desired number of ranges, a desired number of planter passes, and desired parameters for each plot within the field. The field layout system allows different plot lengths and seed populations to be input for individual plots within the same planter pass through the field.

A seeding machine, such as a row crop planter, is described which is adapted to switch between two or more seed varieties as the machine traverses a field. The control system uses a programmed quantity of seed representing a number of seeds in the seed meter that need to be substantially consumed once the flow of a first seed variety is stopped before introducing a second seed variety to minimize seed mixing. The seed quantity can be determined by a calibration process or published from the manufacturer or third parties. The seed quantity can also be part of a seeding prescription that includes assignment of where each seed variety is to be planted in a field. The seed quantity and the distance traveled to empty the meter can be used to optimize the planting operation including the machine direction which can also be part of the prescription.

A seed tube guard for agricultural planters is cast from a high-chrome cast-iron alloy or manufactured from other wear-resistant material. The seed tube guard has right and left wear surfaces for engaging inner surfaces of a pair of opener discs. A fluid delivery channel is integrated within the body of the seed tube guard with an exit in the bottom surface for delivering fluid into a seed furrow ahead of a seed tube.

A horticulture apparatus for preparing and seeding a strip of farmland with a tractor includes a front frame fixed with the tractor and including a horizontal tine support bar for holding a plurality of downwardly-projecting tines. The front frame includes a middle frame pivot mount and pivot angle adjustment mechanism. A middle frame is fixed with the middle frame pivot mount and is adapted to be raised or lowered. A longitudinal support bar is fixed with a drill planter roller assembly that includes two drill planter roller frames each supporting at least one adjustable drill planter roller. A U-shaped back frame has two forward arms each pivotally fixed with the middle frame and including a rear drill planter roller. A seed distributing mechanism for fixing with the tractor includes a hopper having an open top end and a bottom end that includes a seed distribution opening and a seed spreader.

Biosensor apparatus and associated method for detecting a target material using a vibrating resonator having a surface that operably interacts with the target material. A detector is in electrical communication with a sensor, the sensor comprising a first paddle assembly connected to a second paddle assembly, the first paddle assembly having at least one microbalance sensing resonator proximate a proximal end and at least one sensing electrical contact proximate a distal end in electrical communication with the sensing resonator. The at least one sensing resonator has a target coating for operably interacting with the target material, and the second paddle assembly has a microbalance reference resonator proximate the proximal end and at least one reference electrical contact proximate the distal end in electrical communication with the reference resonator.

A scraper assembly for removing mud and moist soil from the gauge wheels of an agricultural planter includes a support rod attached to a hub of a gauge wheel arm, a clamp structure attached to an end portion of the support rod, and a scraper blade attached to the clamp structure. An axis of the end portion of the support rod is approximately perpendicular to and intersects with an axis of rotation of the gauge wheel. The scraper blade is mounted approximately perpendicular to the outer surface of the gauge wheel and is angled approximately 45 degrees from the sides of the gauge wheel. The scraper blade has a curved profile along its length that substantially matches an outer profile of the outer surface of the gauge wheel when the scraper blade is properly adjusted.

Group III nitride based light emitting devices and methods of fabricating Group III nitride based light emitting devices are provided. The emitting devices include an n-type Group III nitride layer, a Group III nitride based active region on the n-type Group III nitride layer and comprising at least one quantum well structure, a Group III nitride layer including indium on the active region, a p-type Group III nitride layer including aluminum on the Group III nitride layer including indium, a first contact on the n-type Group III nitride layer and a second contact on the p-type Group III nitride layer. The Group III nitride layer including indium may also include aluminum.

An airbag system for protecting rear seat occupants in dynamic side impacts using an improved packaging arrangement is provided. The system includes seat base and seat back frames. The seat back frame is movable between an upright position and a reclined position. The system further includes a unified airbag having a pelvic portion and a thoracic portion. The pelvic portion is positioned adjacent to the seat base frame. The thoracic portion is positioned adjacent to the seat back frame. The unified airbag is attached to the seat base frame by fixed anchors and to the seat back frame by a movable anchor. A grooved track is provided for attachment of the movable anchor. The airbag may be a strip shape or a triangular shape. One or more tethers may be attached to the unified airbag.

A method of monitoring a well for unwanted formation fluid influx is disclosed. Measurements of well outflow are acquired during a period in which drilling operations are performed for the well. Occurrences of stagnant flow events during the period are determined. An outflow signature is generated from the well outflow measurements for each stagnant flow event. The outflow signatures are displayed sequentially in time of occurrence. Each outflow signature is analyzed for an anomaly.

A THz frequency range antenna is provided which comprises: a semiconductor film (3) having a surface adapted to exhibit surface plasmons in the THz frequency range. The surface of the semiconductor film (3) is structured with an antenna structure (4) arranged to support localized surface plasmon resonances in the THz frequency range.

The invention relates to an incineration plant with a furnace, a device for feeding back incineration residues into the furnace, a device for measuring at least one parameter of the incineration, and devices for controlling the incineration. Moreover, the invention relates to a method for controlling an incineration plant.

A slag remover for discharging combustion residues of an incineration plant comprises a trough, which has a trough housing having two side walls, which define the trough width, and having a trough bottom, and which is intended to collect the combustion residues evacuated from a combustion chamber of the incineration plant. The trough further comprises at least two push rams for pushing the combustion residues out of the trough, and a shaft rotatably mounted in two shaft bearings and on which at least one drive lever cooperating with a cylinder-piston unit and at least two output levers connected to respectively one of the push rams are disposed in a rotationally secure manner. The cylinder-piston unit is here designed such that the push rams move back and forth between a retracted position and an extended position. The drive lever is disposed between two output levers.

A carbon fuel combustion process, employing an air gas separation unit, a combustion unit operating either with air or with an oxidizer leaner in nitrogen than air, coming from the air gas separation unit, and a unit for compressing and/or purifying the CO2 coming from the combustion flue gas, wherein the power consumed by the air gas separation unit and/or the flow of oxygen produced by the air gas separation unit and/or the capture of the CO2 coming from the combustion flue gas are variable over time is presented.

A method is illustrated and described for reducing unwanted substances by injecting a reactant into a flue gas of a steam generator. In order that the reactant can also be used in larger steam generators and/or combustion chambers, a method is proposed, in which the reactant is injected into the combustion chamber of the steam generator via a reactant opening of a multi-component nozzle, in which an enveloping medium is injected into the combustion chamber through at least one enveloping medium opening arranged outside the reactant opening, and in which the enveloping medium at least partly envelops the reactant in the combustion chamber and in this way at least partly shields the reactant from the flue gas.

A waste disposal plant includes a combustion chamber (2) inside which waste laid on a combustion grate (3) is burnt, which permits the entrance of an adequate quantity of combustion air in the chamber. The combustion grate includes at least a handling group formed by of fire bars or plates (7), which move alternatively one with respect to the other by advancing the waste on the grate. A handling group permits the alternate movement of the fire bars (7) which are divided in movable fire bars (7a) and fixed fire bars (7b), alternately disposed one with respect to the other, on transversal rows resting one upon the other according to a longitudinal placement with alternate steps.

Photo-field-effect transistor devices and associated methods are disclosed in which a photogate, consisting of a quantum dot sensitizing layer, transfers photoelectrons to a semiconductor channel across a charge-separating (type-II) heterointerface, producing a sustained primary and secondary flow of carriers between source and drain electrodes. The light-absorbing photogate thus modulates the flow of current along the channel, forming a photo-field effect transistor.

A crack resistant solar cell module includes a protective package mounted on a frame. The protective package includes a polyolefin encapsulant that protectively encapsulates solar cells. The polyolefin has less than five weight percent of oxygen and nitrogen in the backbone or side chain. In other words, the combined weight percent of oxygen and nitrogen in any location in the molecular structure of the polyolefin is less than five. The polyolefin also has a complex viscosity less than 10,000 Pa second at 90° C. as measured by dynamic mechanical analysis (DMA) before any thermal processing of the polyolefin. The protective package includes a top cover, the encapsulant, and a backsheet. The solar cell module allows for shipping, installation, and maintenance with less risk of developing cracks on the surfaces of the solar cells.

A solar-cell sealant that has excellent properties such as transparency, flexibility, adhesiveness, heat resistance, appearance, cross-linking characteristics, electrical characteristics, and calenderability. A solar-cell sealant that contains an ethylene/α-olefin/unconjugated-polyene copolymer satisfying requirements (a1) through (a3). Requirement (a1) is that constituent units derived from ethylene constitute 80-90 mol %, constituent units derived from C3-20 α-olefin constitute 9.99-19.99 mol %, and constituent units derived from an unconjugated polyene constitute 0.01-5.0 mol % of said copolymer. Requirement (a2) is that the MFR of said copolymer, as measured in accordance with ASTM D1238 at 190° C. under a 2.16 kg load, be at least 2 g/10 min. and less than 10 g/10 min. Requirement (a3) is that the Shore A hardness of said copolymer, as measured in accordance with ASTM D2240, be 60 to 85.

A surface of a photovoltaic cell is coated with a solution that includes barium titanate to reduce reflection of sunlight that is incident on the surface. The solution may include a base of polydimethylsiloxane and carbon nanotubes. The process may be used in the fabrication of new photovoltaic cell assemblies, or to retrofit existing assemblies in situ.

Electrical enclosures are provided that include arc resistant features designed to add structural strength for arc containment, to inhibit arc propagation, and/or to direct the release of pressure within and/or from the enclosure in order to provide arc resistant electrical enclosures. In general, the arc resistant features may be designed to provide enclosures where in the event of an arc fault, the doors and covers remain closed, parts are not ejected from the enclosure, holes are not produced in the enclosure, indicators located in close proximity to the enclosure do not ignite, and/or grounding connections remain effective. Further, the foregoing features may be designed to provide electrical enclosures that comply with industry guides and standards for arc resistant ratings.

Binding equipment and false cover forming equipment for hardcover books are disclosed. The false cover forming equipment carries out false covers, by positioning a pair of endpapers in correspondence of lateral binding flaps of a respective backstrip, arranging folds of the endpapers at a pre-assembling distance associated with the thickness of the text block and gluing margins of past-down sheets of the endpapers with binding edges of the backstrip. The binding equipment is feedable, at a cover input “IC”, with the false covers for carrying out book blocks by gluing the backstrips of the false covers with the binding edges of corresponding text blocks and refolding the pairs of endpapers on the respective text blocks. An electronic processing unit is settable for the control of the false cover forming equipment and the binding equipment as a function of the dimensions of the hardcover book to be bound.

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 automatic antenna impedance matching method for a radiofrequency transmission circuit. An impedance matching network is inserted between an amplifier and an antenna. The output current and voltage of the amplifier and their phase difference are measured by a variable measurement impedance, and the complex load impedance of the amplifier is deduced from this; the impedance of the antenna is calculated as a function of this complex impedance and as a function of the known current values of the impedances of the matching network. Starting from the value found for the impedance of the antenna, new values of the matching network are calculated that allow the load to be matched to the nominal impedance of the amplifier. The measurement impedance has a value controllable by the calculation processor according to the application and notably as a function of the operating frequency and of the nominal impedance of the amplifier.

The invention relates to an adapter for driven tools such as drilling or milling tools, for adapting an externally fed driven tool for use in a thru coolant system comprising: a) a cylindrical inner sleeve, b) an outer sleeve adapted to rotate relative to the inner sleeve, c) a delivery pipe to deliver coolant to the outer sleeve, and d) at least one coolant flow channel through the outer sleeve and through the inner sleeve to allow flow of coolant from the delivery pipe to the collet, and e) a seal at one end of the inner sleeve having an aperture to receive the cutting tool whereby to allow the blunt end of the tool to engage the collet, in use coolant can pass through the outer sleeve, through the inner sleeve into the collet, and to the cutting tool whilst said inner sleeve rotates with said machine output spindle and the outer sleeve remains static.