Holroyd, GB
Amyas Holroyd, Devon GB
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20130022306 | GAIN CONTROL FOR AN OPTICAL MODULATOR - There is described an optical modulation system for transmitting modulated optical light. The system comprises an electro-optic modulator having at least two arms through which light is transmitted and an imbalance electrode located on at least one arm. A current source is configured to inject current into the imbalance electrode for modifying the phase of light passing through the arm. A dither generator is configured to modulate the injected current, or bias voltage applied to at least one of the arms, with a dither signal. A phase sensitive detector is configured to detect an error in the phase of light emitted by the modulator. An operating point controller is configured to monitor the detected phase error and adjust the current injected into the imbalance arm so as to compensate for the detected error and thereby control an operating point of the modulator. | 01-24-2013 |
Amyas Daniel Holroyd, Paington GB
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20120294622 | ALIGNMENT OF A DATA SIGNAL TO AN ALIGNMENT SIGNAL - The present invention provides a method and apparatus for phase aligning two optical signals within an optical transmitter to each other (and, in some embodiments, to a pulse carved optical signal) using integrated complimentary taps and a dither signal. The phase of a first signal may be intentionally offset relative to the phase of a second signal. Based on the offset, a correction factor may be calculated. The correction factor may be used to shift the phase of the first signal and/or the second signal in order to generally align the signals. This procedure may be automatically performed in a feedback loop to cause the signals to come into alignment and maintain the alignment of the signals during operation of the transmitter. | 11-22-2012 |
Carl Justin Holroyd, Shrewsbury GB
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20090295105 | TANDEM WHEEL SUSPENSION SYSTEMS - A trailer tandem wheel suspension system comprising a pair of suspension units ( | 12-03-2009 |
20100101156 | BARRIER SYSTEM - A mobile barrier system comprises a wheeled trailer and a barrier mounted on the trailer. The barrier comprises a series of panels configured to form walls of the trailer in a collapsed condition for transportation of the barrier. The panels are movable to an erected condition for assembly of the barrier in which the panels are substantially aligned to form the barrier. One or more panels may be adjustable to vary the width of the barrier and two or more barrier systems may be linked to form a wider barrier. Stabilisers are provided to resist movement of the barrier in the erected condition. Guard panels at the top of the barrier can be deployed to resist scaling of the barrier by individuals and/or to increase the height of the barrier. | 04-29-2010 |
Michael Holroyd, Cambridge GB
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20100065050 | MEDICAMENT DISPENSING DEVICE WITH A MULTIMATERIAL DIAPHRAGM BOUNDING A PNEUMATIC FORCE CHAMBER - A metered dose inhaler for use with a pressurized aerosol container which is preferably breath-actuated. A preload is applied to the internal aerosol valve by an amount sufficient to result in a dose release, but this is prevented by the application of a pneumatic resisting force. The inhaler comprises a release device which, upon actuation, releases the resisting force and allows the preload to actuate the aerosol valve. A metered dose of medicament is then released for inhalation by the patient. The pneumatic resisting force is established by a negative pressure region defined in part by a diaphragm. The diaphragm includes a central disk of a first, relatively high stiffness material and a peripheral ring, coupled by a flexure of a second, relatively low stiffness material. | 03-18-2010 |
20100147293 | AEROSOL ACTUATOR - A metered dose aerosol actuator, for use in association with a pressurized medicament container provided with a dispensing metering valve having a valve stem, including a housing adapted to receive the container, a stem block extending upwards from the base of the housing and adapted to engage the valve stem by means of a cavity provided in the stem block, the stem block being provided with a spray orifice adapted to be in flow connection with the valve stem and the cavity, a sump extending downwards from the cavity relative to the spray orifice, wherein the sump has a smooth, rounded interior surface. | 06-17-2010 |
Michael John Holroyd, Cambridge GB
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20100203256 | METHOD AND APPARATUS FOR THE APPLICATION OF POWDER MATERIAL TO SUBSTRATES - An apparatus for electrostatically charging powder material and supplying it to an applicator for electrostatically applying the powder material to solid dosage forms includes a mixer for mixing a sump of the powder material to electrostatically charge the powder material, the mixer including two substantially parallel elongate mixing shafts having oppositely angled mixing paddles thereon and being arranged to rotate in opposite directions; and a feeder for removing the electrostatically charged powder material from the sump and supplying it to the applicator, and a method for electrostatically charging powder material and supplying it to an applicator for electrostatically applying the powder material to solid dosage forms. | 08-12-2010 |
Robert Holroyd, Halifax GB
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20100196148 | TURBOMACHINE - A turbomachine comprises a housing ( | 08-05-2010 |
20130094938 | TURBOMACHINE - A turbomachine comprising a housing defining a bearing cavity and a turbine chamber separated by a first wall, a heat shield disposed between the first wall and the turbine wheel, a heat shield cavity defined between the first wall and the heat shield. The shaft extends through a passage defined in part by a first aperture in the wall and a second aperture in the heat shield. A first seal is provided between the shaft and the first aperture. The housing defines a first gas channel communicating with the heat shield cavity for connection to a pressure source for raising pressure within the heat shield cavity. A second channel is provided between the heat shield cavity and the passage, the second channel opening to the passage on the opposite side of the first seal to the bearing assembly. A second seal is provided between the shaft and the second aperture. | 04-18-2013 |
Robert Holroyd, West Yorkshire GB
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20110020111 | TURBOCHARGER - According to an aspect of the present invention, there is provided a variable geometry turbine comprising: a turbine wheel mounted on a turbine shaft within a housing assembly for rotation about a turbine axis, the housing assembly defining a gas flow inlet passage upstream of the turbine wheel; an annular wall member defining a wall of the inlet passage and which is displaceable in a direction substantially parallel to the turbine axis to control gas flow through the inlet passage; at least one moveable rod operably connected via a first end of the rod to the annular wall member, the rod being moveable to control displacement of the annular wall member, the rod extending in a direction substantially parallel to the turbine axis, the rod being connected to the annular wall member via a first arm and a second arm, a first end of the first arm and a first end of the second arm being attached to the rod, and a second end of the first arm being attached to the annular wall member at a first circumferential position, and a second end of the second arm being attached to the annular wall member at a second, different circumferential position, the first arm and the second arm being resilient in order to allow relative movement between the first end of the rod and the annular wall member during expansion of the annular wall member. | 01-27-2011 |
Robert L. Holroyd, Huddersfield GB
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20130164157 | GENERATOR ARRANGEMENT - A generator arrangement comprises a turbocharger having a compressor configured to be placed in fluid flow communication with an engine inlet, and a first turbine having a first turbine wheel, a first inducer portion upstream, in use, of the first turbine wheel and configured to be placed in fluid flow communication with an engine outlet, and a first exducer portion downstream, in use, of the first turbine wheel; and an electrical generator having a second turbine having a second turbine wheel, a second inducer portion upstream, in use, of the second turbine wheel and configured to be placed in fluid flow communication with the engine outlet, and a second exducer portion downstream, in use, of the second turbine wheel. The first and second turbines are arranged in parallel to one another; and the first inducer portion and second inducer portion, and/or the first exducer portion and second exducer portion are contiguous. | 06-27-2013 |
Robert L. Holroyd, Stainland GB
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20120286066 | VARIABLE GEOMETRY TURBOMACHINE - Variable geometry turbomachine with a bearing housing, an adjacent turbine housing, a turbine wheel rotating in the turbine housing about a turbine axis; an inlet passage upstream of the turbine wheel between inlet surfaces of first and second wall members, one wall member moveable along the turbine axis to vary the inlet passage size; vanes across the inlet passage connected to a first wall member; an array of vane slots defined by the second wall member to receive the vanes for relative movement between the wall members; the second wall member comprising a shroud defining vane slots; the second wall member supported by a support member retained by a mounting feature; the mounting feature being one of the bearing housings, the turbine housing, or the actuation element; and the shroud is fixed to the support member so axial movement of the shroud relative to the support member is substantially prevented. | 11-15-2012 |
20140130351 | VARIABLE GEOMETRY TURBOMACHINE - A method for assembling a variable geometry turbomachine with a bearing housing, an adjacent turbine housing, a turbine wheel rotating in the turbine housing about a turbine axis; an inlet passage upstream of the turbine wheel between inlet surfaces of first and second wall members, one wall member moveable along the turbine axis to vary the inlet passage size; vanes across the inlet passage connected to a first wall member; an array of vane slots defined by the second wall member to receive the vanes for relative movement between the wall members; the second wall member comprising a shroud defining vane slots; the second wall member supported by a support member retained by a mounting feature; the mounting feature being one of the bearing housings, the turbine housing, or the actuation element; and the shroud is fixed to the support member. | 05-15-2014 |
Robert L. Holroyd, Halifax GB
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20110103938 | TURBOMACHINE - A variable geometry turbine comprising: a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls; a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; the annular inlet divided into axially adjacent annular portions by at least one annular baffle which is axially spaced from the first and second inlet sidewalls; inlet formations extending axially across at least two of said annular portions defined by the or each baffle so as to divide said annular inlet into at least two axially offset inlet passages; the baffle(s) and inlet formations forming part of a nozzle assembly located within said annular inlet; wherein first and second components of the nozzle assembly define complementary features which co-operate to connect together said first and second components. | 05-05-2011 |
20110110766 | TURBOMACHINE - A variable geometry turbine comprises a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls; and a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; wherein the annular inlet is divided into at least three axially offset annular inlet portions by two or more axially spaced annular baffles disposed between the first and second inlet sidewalls; inlet vanes extending axially into at least one of the inlet portions and defining circumferentially adjacent inlet passages; and wherein each of at least two of said baffles extends radially inboard of inlet vanes which extend into at least one of the inlet portions axially adjacent the respective baffle, and wherein a distance between an inner diameter of a first baffle of said at least two of said baffles and a trailing edge of a radially innermost vane in one of said annular inlet portions adjacent the first baffle is greater than a distance between an inner diameter of a second baffle of said at least two of said baffles and a trailing edge of a radially innermost vane in one of said annular inlet portions adjacent the second baffle. | 05-12-2011 |
20110123316 | VARIABLE GEOMETRY TURBINE - A variable geometry turbine comprises: a turbine wheel ( | 05-26-2011 |
20110194929 | TURBOMACHINE - According to a first aspect of the present invention there is provided a variable geometry turbine comprising: a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and a guide for guiding the movement of the cylindrical sleeve, the guide being at least partially located within the inlet at a radially extent of the inlet portions, and extending in an axial direction parallel to the turbine axis. | 08-11-2011 |
20130315718 | TURBOMACHINE - A variable geometry turbine comprising a turbine wheel mounted for rotation about a turbine axis within a housing. The housing defines an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls. The turbine further comprises a cylindrical sleeve that is axially movable across the annular inlet to vary the size of a gas flow path through the inlet. The annular inlet is divided into at least two axially offset inlet passages. The inner diameter of the sleeve is greater than the inner diameter of the inlet passages. | 11-28-2013 |
20140105730 | TURBOMACHINE - According to a first aspect of the present invention there is provided a variable geometry turbine comprising: a turbine wheel mounted for rotation about a turbine axis within a housing, the housing defining an annular inlet surrounding the turbine wheel and defined between first and second inlet sidewalls, the annular inlet being divided into at least two axially offset inlet portions; a cylindrical sleeve axially movable across the annular inlet to vary the size of a gas flow path through the inlet; and a guide for guiding the movement of the cylindrical sleeve, the guide being at least partially located within the inlet at a radially extent of the inlet portions, and extending in an axial direction parallel to the turbine axis. | 04-17-2014 |
20140133969 | VARIABLE GEOMETRY TURBINE - A variable geometry turbine comprises: a turbine wheel in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots configured to receive said vanes to accommodate relative movement between the first and second wall members; the second wall member comprising at least two axially adjacent co-axial plates, a first plate defining a first array of openings which overlie a second array of openings defined by a second plate so as to define said array of vane slots, said first plate being fixed to said second plate. | 05-15-2014 |
20140248138 | VARIABLE GEOMETRY TURBINE - A variable geometry turbine comprises: a turbine wheel in a housing for rotation about a turbine axis; an annular inlet passage defined between respective radial inlet surfaces of first and second wall members, at least one of said first and second wall members being moveable along the turbine axis to vary the size of the inlet passage; an array of vanes extending across the inlet passage, said vanes being connected to said first wall member; a complementary array of vane slots defined by the second wall member, said vane slots configured to receive said vanes to accommodate relative movement between the first and second wall members; the second wall member comprising at least two axially adjacent co-axial plates, a first plate defining a first array of openings which overlie a second array of openings defined by a second plate so as to define said array of vane slots, said first plate being fixed to said second plate. | 09-04-2014 |
Trevor James Holroyd, West Sussex GB
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20120109580 | SENSOR BASED MEANS OF MONITORING THE MECHANICAL CONDITION OF ROTATING MACHINERY THAT OPERATES INTERMITTENTLY - A method of monitoring the mechanical condition of a machine in which statistically significant measurements on a characteristic signal are made over a period of time which can include interruptions and variations in the operation of the machine giving rise to uncharacteristic signals and the processing of the signal during the statistically significant measurement automatically excludes those parts of the signal associated with interruptions and variations in the operation of the machine. The invention also includes apparatus for carrying out the above method including a preamplifier, adapted to provide output to a further amplifier, adapted to provided output to dynamic enveloping circuitry, adapted to provide an output to an analogue to digital converter, adapted to provide an output to a digital micro-electronic device. | 05-03-2012 |
20140288880 | SENSOR BASED MEANS OF MONITORING THE MECHANICAL CONDITION OF ROTATING MACHINERY THAT OPERATES INTERMITTENTLY - A method of monitoring the mechanical condition of a machine in which statistically significant measurements on a characteristic signal are made over a period of time which can include interruptions and variations in the operation of the machine giving rise to uncharacteristic signals and the processing of the signal during the statistically significant measurement automatically excludes those parts of the signal associated with interruptions and variations in the operation of the machine. The invention also includes apparatus for carrying out the above method including a preamplifier, adapted to provide output to a further amplifier, adapted to provided output to dynamic enveloping circuitry, adapted to provide an output to an analogue to digital converter, adapted to provide an output to a digital micro-electronic device. | 09-25-2014 |