Patents by Inventor David Rayner
David Rayner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20160306901Abstract: A method and apparatus for generating geometric data are to be used in the building of an object using a layer-by-layer additive manufacturing process. The method includes providing object data defining the object, identifying from the object data one or more regions of a surface of the object to be supported during the additive manufacturing process and, for the or each region, identifying one or more supporting structures that will provide support for the region and generating an arrangement of supports within the region. A support location of each support of the arrangement relative to the other supports of the arrangement is derived from a location of the supporting structures.Type: ApplicationFiled: December 16, 2014Publication date: October 20, 2016Applicant: RENISHAW PLCInventors: Iain AINSWORTH, Geoffrey David RAYNER, Michael Joseph MCCLELLAND, Ramkumar REVANUR, Ben Ian FERRAR
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Patent number: 9165753Abstract: The present disclosure generally provides ionization methods and devices for use in mass spectrometry. In some embodiments, the ionization methods and devices employ short laser pulses (e.g., pulses having pulsewidths in a range of about 2 fs to about 1 ps) at a high intensity (e.g., an intensity in a range of about 1 TW/cm2 to about 1000 TW/cm2) to ionize an analyte an ambient pressure greater than about 10?5 Torr (e.g., an ambient pressure in a range of about 1 atmosphere to about 100 atmospheres).Type: GrantFiled: December 4, 2012Date of Patent: October 20, 2015Assignees: DH Technologies Development Pte. Ltd., National Research Council of CanadaInventors: Alexandre V. Loboda, Paul Corkum, David Rayner
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Publication number: 20150008313Abstract: The present disclosure generally provides ionization methods and devices for use in mass spectrometry. In some embodiments, the ionization methods and devices employ short laser pulses (e.g., pulses having pulsewidths in a range of about 2 fs to about 1 ps) at a high intensity (e.g., an intensity in a range of about 1 TW/cm2 to about 1000 TW/cm2) to ionize an analyte an ambient pressure greater than about 10?5 Torr (e.g., an ambient pressure in a range of about 1 atmosphere to about 100 atmospheres).Type: ApplicationFiled: December 4, 2012Publication date: January 8, 2015Inventors: Alexandre V. Loboda, Paul Corkum, David Rayner
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Publication number: 20120041740Abstract: The surface of a dental part is scanned by a probe, to obtain a digital model of the surface in a dental CAD computer system. In the digital model, first and second boundary lines are defined, above and below a portion in which the scanned data is missing or unsatisfactory. One of the boundary lines may correspond to a margin line between prepared and unprepared portions of the patient's tooth. A transition surface is generated in the computer system, extending between the first and second boundary lines. This improves the representation of the dental part in the digital model, which may subsequently be used for manufacture of a dental restoration.Type: ApplicationFiled: August 10, 2011Publication date: February 16, 2012Applicant: RENISHAW PLCInventors: David BEEBY, Iain AINSWORTH, Ram Kumar REVANUR, Geoffrey David RAYNER
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Patent number: 7438824Abstract: To make high quality long-range periodic nanostructures in a transparent or semi-transparent substrate, the transparent or semi-transparent substrate is scanned with a linearly polarized laser beam generated by a femtosecond laser and exceeding a predetermined energy/pulse threshold along a scanning path. Sub-diffraction limit structures are formed as periodic planes of modified material in the transparent or semi-transparent substrate extending along the scanning path. The modified material can then be chemically etched to form cavities.Type: GrantFiled: March 24, 2006Date of Patent: October 21, 2008Assignee: National Research Council of CanadaInventors: Rod Taylor, Paul Corkum, Ravi Bhardwaj Vedula, Eli Simova, David Rayner, Cyril Hnatovsky
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Publication number: 20060219676Abstract: To make high quality long-range periodic nanostructures in a transparent or semi-transparent substrate, the transparent or semi-transparent substrate is scanned with a linearly polarized laser beam generated by a femtosecond laser and exceeding a predetermined energy/pulse threshold along a scanning path. Sub-diffraction limit structures are formed as periodic planes of modified material in the transparent or semi-transparent substrate extending along the scanning path. The modified material can then be chemically etched to form cavities.Type: ApplicationFiled: March 24, 2006Publication date: October 5, 2006Applicant: National Research Council of CanadaInventors: Rod Taylor, Paul Corkum, Ravi Vedula, Eli Simova, David Rayner, Cyril Hnatovsky
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Patent number: 7115353Abstract: A system and method for generating a master screen for a silk screen imaging process. Photo activated emulsion is applied to a printing screen and the emulsion is exposed according to a digitized pattern using a light emitting diode (LED) source. The LED source in one embodiment is an array of UV emitting devices which scans the printing screen in a line by line basis.Type: GrantFiled: July 9, 2002Date of Patent: October 3, 2006Inventors: Gary Baxter, Brian Baxter, David Kennedy, P. Gunnar Wareberg, Steve Wilson, David Rayner, Orson Bourne
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Patent number: 7033519Abstract: A sub-micron structure is fabricated in a transparent dielectric material by focusing femtosecond laser pulses into the dielectric to create a highly tapered modified zone with modified etch properties. The dielectric material is then selectively etched into the modified zone from the direction of the narrow end of the tapered zone so that as the selective etching proceeds longitudinally into the modified zone, the progressively increasing width of the modified zone compensates for lateral etching occurring closer to the narrow end so as to produce steep-walled holes. The unetched portion of the modified zone produced by translating the laser beam close to and parallel to the bottom surface of the dielectric can serve as an optical waveguide to collect light from or deliver light to the etched channel which can contain various biological, optical, or chemical materials for sensing applications.Type: GrantFiled: May 8, 2003Date of Patent: April 25, 2006Assignee: National Research Council of CanadaInventors: Rod Taylor, Cyril Hnatovsky, Paul Corkum, David Rayner, Ravi Bhardwaj
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Publication number: 20050167410Abstract: The present invention relates to a method for writing an optical structure within a workpiece of a dielectric material using FLDM. In a first embodiment system parameters for the FLDM are determined in dependence upon the dielectric material, a predetermined volume element and a predetermined change of the refractive index of the dielectric material within the predetermined volume element. The system parameters are determined such that self-focusing of a pulsed femtosecond laser beam is inhibted by non-linear absorption of the energy of the pulsed femtosecond laser beam within the dielectric material. A pulsed femtosecond laser beam based on the determined system parameters is focused at a predetermined location within the workpiece for inducing a change of the refractive index through dielectric modification within the predetermined volume element, the volume element including the focus. Various embodiments enable writing of various different optical structures into a workpiece.Type: ApplicationFiled: March 24, 2005Publication date: August 4, 2005Inventors: Orson Bourne, David Rayner, Paul Corkum, Manjusha Mehendale, Andrei Naumov
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Patent number: 6884960Abstract: The present invention relates to a method for writing an optical structure within a workpiece of a dielectric material using FLDM. In a first embodiment system parameters for the FLDM are determined in dependence upon the dielectric material, a predetermined volume element and a predetermined change of the refractive index of the dielectric material within the predetermined volume element. The system parameters are determined such that self-focusing of a pulsed femtosecond laser beam is inhibted by non-linear absorption of the energy of the pulsed femtosecond laser beam within the dielectric material. A pulsed femtosecond laser beam based on the determined system parameters is focused at a predetermined location within the workpiece for inducing a change of the refractive index through dielectric modification within the predetermined volume element, the volume element including the focus. Various embodiments enable writing of various different optical structures into a workpiece.Type: GrantFiled: August 21, 2001Date of Patent: April 26, 2005Assignee: National Research Council of CanadaInventors: Orson Bourne, David Rayner, Paul Corkum, Manjusha Mehendale, Andrei Yu Naumov
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Publication number: 20050072325Abstract: A system and method for generating a master screen for a silk screen imaging process. Photo activated emulsion is applied to a printing screen and the emulsion is exposed according to a digitized pattern using a light emitting diode (LED) source. The LED source in one embodiment is an array of UV emitting devices which scans the printing screen in a line by line basis.Type: ApplicationFiled: July 9, 2002Publication date: April 7, 2005Inventors: Gary Baxter, Brian Baxter, David Kennedy, P. Wareberg, Steve Wilson, David Rayner, Orson Bourne
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Publication number: 20040094527Abstract: The present invention relates to a method for writing an optical structure within a workpiece of a dielectric material using FLDM. In a first embodiment system parameters for the FLDM are determined in dependence upon the dielectric material, a predetermined volume element and a predetermined change of the refractive index of the dielectric material within the predetermined volume element. The system parameters are determined such that self-focusing of a pulsed femtosecond laser beam is inhibted by non-linear absorption of the energy of the pulsed femtosecond laser beam within the dielectric material. A pulsed femtosecond laser beam based on the determined system parameters is focused at a predetermined location within the workpiece for inducing a change of the refractive index through dielectric modification within the predetermined volume element, the volume element including the focus. Various embodiments enable writing of various different optical structures into a workpiece.Type: ApplicationFiled: June 16, 2003Publication date: May 20, 2004Inventors: Orson Bourne, David Rayner, Paul Corkum, Manjusha Mehendale, Andrei Yu Naumov
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Publication number: 20030235385Abstract: A sub-micron structure is fabricated in a transparent dielectric material by focusing femtosecond laser pulses into the dielectric to create a highly tapered modified zone with modified etch properties. The dielectric material is then selectively etched into the modified zone from the direction of the narrow end of the tapered zone so that as the selective etching proceeds longitudinally into the modified zone, the progressively increasing width of the modified zone compensates for lateral etching occurring closer to the narrow end so as to produce steep-walled holes. The unetched portion of the modified zone produced by translating the laser beam close to and parallel to the bottom surface of the dielectric can serve as an optical waveguide to collect light from or deliver light to the etched channel which can contain various biological, optical, or chemical materials for sensing applications.Type: ApplicationFiled: May 8, 2003Publication date: December 25, 2003Inventors: Rod Taylor, Cyril Hnatovsky, Paul Corkum, David Rayner, Ravi Bhardwaj
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Patent number: 5517911Abstract: A numbering box for a press for printing bank notes has a stack of sensor boards in one-to-one correspondence with a stack of numbering wheels and each of the boards has an edge area at the printing face of the numbering box which carries an LED indicator of a status of magnetic signalling means on the respective numbering wheel. The boards are each connected to a motherboard in the numbering box. Data processing means in the numbering box may be connected to a remote computer by an optical fibre link. The sensor boards are closely spaced and each has an aperture to accommodate a bulky component of the or an adjacent board.Type: GrantFiled: April 4, 1994Date of Patent: May 21, 1996Assignee: Komori Currency Technology U.K. Ltd.Inventors: Michael Rendell, David Rayner
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Patent number: 5044817Abstract: A threaded bush assembly for receiving and coupling a shaft to a rotatable hub includes a tubular sleeve member which is located within the rotatable hub and a tubular bush member adapted to be received in either end of the sleeve member. The bush member has a central bore in which the shaft is received and is axially moveable relative to the sleeve member by means of screw threaded members. The inner circumferential surface of the sleeve member and the outer circumferential surface of the bush member each have a helical thread formed thereon. The cross-section of both threads is defined by a pair of mutually opposed tapered surfaces. The two threads are screw threadedly engageable with one another, yet define a gap therebetween which enables relative axial movement of the two threads with respect to one another such that upon axial movement of the bush member relative to the sleeve member, one tapered surface of one thread wedges against the facing tapered surface of the other thread.Type: GrantFiled: January 5, 1990Date of Patent: September 3, 1991Assignee: J. H. Fenner & Co. LimitedInventors: David A. Rayner, Rodney Chester
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Patent number: 4512681Abstract: The present specification discloses a tapered, longitudinally-split contractible taper bush for securing pulleys, sprockets, coupling flanges or other machine elements onto cylindrical shafts and utilizing a plurality of screws or bolts parallel with the hub axis for effecting wedging of the bush between the hub of the element and the shaft onto which it is mounted. Known bushes of this type suffer an out of balance moment due to the arrangemnt of locking holes, part threaded holes provided for de-wedging and bush removal, and the size of the longitudinally extending slit which is necessary to promote flexibility in the bush for bush removal.The present invention overcomes the out of balance problem by providing profiling in the region of the longitudinal slit so that the disposition of metal is then such as to compensate for the mass imbalance in both the bush and a co-operating mating hub, a rotationally balanced system being thus provided.Type: GrantFiled: July 31, 1981Date of Patent: April 23, 1985Assignee: J.H. Fenner & Co. LimitedInventors: Gordon A. Hayhurst, David A. Rayner