Christopher J Bull

US Patent:

7387032, Jun 17, 2008

Filed:

Mar 16, 2005

Appl. No.:

11/082305

Inventors:

Rodney J. Clifton - Barrington RI, US
Tong Jiao - Pawtucket RI, US
Christopher Bull - Rehoboth MA, US

Assignee:

Brown University - Providence RI

International Classification:

G01N 3/24
G01L 1/24

US Classification:

73841, 73800

Abstract:

In one aspect the present invention concerns methods and apparatus for measuring the mechanical properties of soft materials across a frequency regime. In particular, the present invention concerns methods and apparatus using torsional waves to measure the mechanical properties of vocal fold tissue and candidate materials for use in human vocal fold reconstruction. In embodiments of the present invention, sample material is placed between two plates whose sides are faceted. One of the plates is attached to the shaft of a galvanometer, and the plate is twisted back and forth through angles of up to 6 at frequencies of up to 2500 Hz. If required, the assembly may be enclosed in an environmental chamber to maintain the temperature and relative humidity of the sample at the conditions experienced by vocal folds in a living human or animal. The rotations of the top and bottom plates are monitored by an optical lever technique in which laser beams, reflected off the faceted faces of the plates, are captured by photodiode detectors. The experimentally determined amplification factor is obtained as the ratio of the amplitude of the rotation of the top plate divided by the corresponding amplitude of the bottom plate.

US Patent:

20190393583, Dec 26, 2019

Filed:

May 28, 2019

Appl. No.:

16/423782

Inventors:

- Cary NC, US
Christopher Bull - Milford MA, US

International Classification:

H01Q 1/12
B64C 39/02
G05D 1/10

Abstract:

A computer implemented method and apparatus for automatic antenna alignment. The method comprises receiving a request to initiate antenna alignment; collecting location data from the drone; collecting location data from the target device; calculating bearing and altitude of the drone and the target device using the collected location data; and aligning the drone with the target device based on the calculated bearing and altitude.

US Patent:

20190010076, Jan 10, 2019

Filed:

Jun 29, 2018

Appl. No.:

16/024086

Inventors:

- Providence RI, US
Rajiv GUPTA - Wayland MA, US
Avilash CRAMER - Lynnfield MA, US
Christopher BULL - Rehoboth MA, US
Paul WALTZ - Seekonk MA, US
Angus KINGON - Providence RI, US

International Classification:

C03B 37/012
G02B 6/08
B29C 43/00
G01T 1/20
B29C 43/58
B29D 11/00
B29K 505/02
B29K 105/16
B29K 77/00
B29K 27/12
B29K 25/00
B29C 43/18
B29K 505/08
B29L 11/00
B82Y 15/00
B29K 23/00

Abstract:

A method and apparatus to manufacture a coherent bundle of scintillating fibers is disclosed. A method includes providing a collimated bundle having a glass preform with capillaries therethrough known in the industry as a glass capillary array, and infusing the glass capillary array with a scintillating polymer or a polymer matrix containing scintillating nanoparticles.

US Patent:

20170362114, Dec 21, 2017

Filed:

Jun 19, 2017

Appl. No.:

15/626784

Inventors:

- Providence RI, US
Rajiv Gupta - Wayland MA, US
Avilash Cramer - Lynnfield MA, US
Christopher Bull - Rehoboth MA, US
Paul Waltz - Seekonk MA, US
Angus Kingon - Providence RI, US

International Classification:

C03B 37/012
G01T 1/20
B29C 43/00
B82Y 15/00
B29K 27/12

Abstract:

A method and apparatus to manufacture a coherent bundle of scintillating fibers is disclosed. A method includes providing a collimated bundle having a glass preform with capillaries therethrough known in the industry as a glass capillary array, and infusing the glass capillary array with a scintillating polymer or a polymer matrix containing scintillating nanoparticles.

US Patent:

20170176606, Jun 22, 2017

Filed:

Mar 3, 2017

Appl. No.:

15/449205

Inventors:

- Providence RI, US
Rajiv Gupta - Wayland MA, US
Avilash Cramer - Lynnfield MA, US
Christopher Bull - Rehoboth MA, US
Paul Waltz - Seekonk MA, US

International Classification:

G01T 1/20
C03B 37/012
B29D 11/00
B29C 43/58
B29C 43/00

Abstract:

A method and apparatus to manufacture a coherent bundle of scintillating fibers is disclosed. In the method and apparatus, a polymer matrix of a transparent polymer and nanoparticle scintillators is placed on top of a collimated bundle having a plurality of capillaries and pressed in a pressure vessel until the polymer matrix is forced into the capillaries. Pressure is applied via an anvil on top of the polymer matrix. To prevent fracturing of the collimated bundle during pressing, back pressure is supplied to the pressure vessel via a valve, which controls a supply of high pressure gas. Alternatively, the back pressure may also be supplied by a press (and or pressure) and support to the collimated bundle is provided by a high melting point thermoplastic. Heat may be applied to the polymer matrix via the anvil to speed the pressing operation due to the viscosity of the polymer.

US Patent:

20140094674, Apr 3, 2014

Filed:

Sep 16, 2013

Appl. No.:

14/028178

Inventors:

- PROVIDENCE RI, US
Ming YIN - Providence RI, US
William R. Patterson - Rehoboth MA, US
Juan ACEROS - Providence RI, US
David A. BORTON - Providence RI, US
Christopher W. BULL - Rehoboth MA, US
Farah LAIWALLA - Providence RI, US

Assignee:

BROWN UNIVERSITY - PROVIDENCE RI

International Classification:

A61B 5/0478
A61N 1/36

US Classification:

600378, 607 45

Abstract:

Systems and methods for providing an electrical interface to a body are provided. In one embodiment, an implantable module is disclosed, comprising: an implantable electrode array, implantable within a body and capable of providing a plurality of communication channels for communicating electrical signals detected in a body; an amplifier circuit for processing electrical signals received from the electrode array; a wireless transceiver for sending and receiving telemetry data between the amplifier circuit and a wireless receiver located outside of the body; and a sealed enclosure that houses the amplifier circuit and the wireless transmitter and is biocompatible with surrounding tissue, the enclosure having a window that is transparent to a wireless medium used by the wireless transceiver. In another embodiment, a wireless transceiver and amplifier is detachably coupled to a transcutaneous attachment device, and the implantable electrode array is electrically coupled to the interface board via the transcutaneous attachment device.