James C Rodgers

US Patent:

6556953, Apr 29, 2003

Filed:

Apr 9, 2001

Appl. No.:

09/829448

Inventors:

Samuel C. Lay - Broomfield CO
Jeffrey J. Nelson - Louisville CO
James Rodgers - Boulder CO
Kenneth N. Jessop - Arvada CO

Assignee:

McData Corporation - Broomfield CO

International Classification:

H02H 305

US Classification:

702183, 714 56

Abstract:

A non-disruptive, on-line testing and switchover method and apparatus in a high availability, fiber channel switching environment. In a network having an active switching element, a redundant switching element and a port, one aspect of the present invention provides for verifying a working data path from the port to the redundant switching element, and thereafter verifying a working control path to the redundant switching element. Both verification tests take place without interrupting operation on the network. In addition, another aspect of the present invention provides for recognizing a failure occurrence in the active switching element, and thereafter switching to the redundant switching element with the potential for minimal frame loss.

US Patent:

6643602, Nov 4, 2003

Filed:

Oct 29, 2002

Appl. No.:

10/284120

Inventors:

Samuel C. Lay - Broomfield CO
Jeffrey J. Nelson - Louisville CO
James Rodgers - Boulder CO
Kenneth N. Jessop - Arvada CO

Assignee:

Mcdata Corporation - Broomfield CO

International Classification:

G02B 628

US Classification:

702117, 398 43

Abstract:

A non-disruptive, on-line testing and switchover method and apparatus in a high availability, fibre channel switching environment. In a network having an active switching element, a redundant switching element and a port, one aspect of the present invention provides for verifying a working data path from the port to the redundant switching element, and thereafter verifying a working control path to the redundant switching element. Both verification tests take place without interrupting operation on the network. In addition, another aspect of the present invention provides for recognizing a failure occurrence in the active switching element, and thereafter switching to the redundant switching element with the potential for minimal frame loss.

US Patent:

20070061813, Mar 15, 2007

Filed:

Aug 30, 2005

Appl. No.:

11/215877

Inventors:

David Beal - Longmont CO, US
James Rodgers - Boulder CO, US
Brian Burrell - Niwot CO, US
Douglas Goodin - Boulder CO, US
William Cox - Boulder CO, US
Michael Crater - Arvada CO, US

International Classification:

G06F 9/46

US Classification:

718105000

Abstract:

A flexible architecture for embedded firmware of a multiple protocol switch can be implemented on a variety of hardware platforms. Hardware components of a SAN switch are embodied as cooperative modules (e.g., switch modules, port modules, service modules, etc.) with one or more processors in each module. Likewise, firmware components of a SAN switch can be assigned at initialization and/or run time across a variety of processors in any of these modules. The processors and firmware components can communicate via a messaging mechanism that is substantially independent of the underlying communication medium or the module in which a given processor resides. In the manner, firmware components can be reassigned (e.g., in a failover condition), added or removed without substantial disruption to the operation of the SAN.

US Patent:

51556146, Oct 13, 1992

Filed:

Oct 22, 1991

Appl. No.:

7/780422

Inventors:

Ralph H. Carmen - Lebanon NJ
James M. Rodgers - Harrison AR

Assignee:

Duncan Industries Parking Control Systems Corp. - Harrison AR

International Classification:

H04B 1006

US Classification:

359189

Abstract:

A low-power receiver for extracting a digital data signal from a modulated carrier signal is disclosed. The receiver employs an amplifier whose stages share the same bias current in order to reduce power consumption.

US Patent:

48977977, Jan 30, 1990

Filed:

Apr 25, 1988

Appl. No.:

7/185752

Inventors:

Jerome J. Free - Lansdale PA
James C. Rodgers - Pipersville PA
Davie B. Lawhon - Furlong PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

G06F 1546
G01M 1900

US Classification:

364500

Abstract:

In a treatment system for feeding a liquid from a tank having an outlet by a controllable pump operated cyclically, an automatic calibration/measuring system. The system is arranged for determining the volume of liquid pumped each cycle of operation by the pump and comprises a hollow sight glass having first and second sensors coupled thereto. The sight glass is in fluid communication with the tank. The first sensor is arranged to provide a first signal when the level of liquid in the container reaches it while the second sensor, which is located below the first sensor, provides a second signal when the level of liquid in the container reaches it. The container defines a predetermined volume between the first and second sensors. The system also includes a controller to determine the actual number of cycles of operation of the pump required to pump the predetermined volume and if that number has deviated from a preestablished number. If so, the pump is controlled in response to the detected deviation.

US Patent:

51671557, Dec 1, 1992

Filed:

Nov 15, 1991

Appl. No.:

7/793038

Inventors:

James C. Rodgers - Pipersville PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

G01F 2314

US Classification:

73299

Abstract:

A system (10) and methods of use for determining the level of a body of liquid (16), e. g. , a chemical, in a storage tank, irrespective of the specific gravity of that liquid. The system (10) comprises a pressure transducer (22) and an elongated tubular, flexible sheath (24). An operating liquid (26) of lower specific gravity than the body of liquid (16) is disposed within the sheath (24). The transducer (22) is also disposed within the sheath adjacent the bottom end. The sheath (24) is immersed in the body of liquid (16) so that its top end (28) is above the liquid's surface. The pressure applied to the sheath (24) by the liquid (16) causes the sheath to collapse to a minimal internal cross sectional area, whereupon the operating liquid migrates up the sheath to form a very thin column (44). The operating liquid forming a pool (46) is located at the top of the very thin column (44). Thus, the sheath expands outward adjacent the surface (16A) of the body of liquid to retain that pool.

US Patent:

47988932, Jan 17, 1989

Filed:

Sep 21, 1987

Appl. No.:

7/099427

Inventors:

David A. Cherry - Ambler PA
Cynthia A. Maryanoff - Solebury Township PA
John E. Mills - Hatfield PA
Roy A. Olofson - State College PA
James D. Rodgers - North Wales PA

Assignee:

McNeilab, Inc. - Springhouse PA

International Classification:

C07D25116
C07D25120
C07C 6978
C07C 49217

US Classification:

544215

Abstract:

A method for the synthesis of the 2-propanone (I) is described starting from alkoxide (II) through the lactone (IV). ##STR1## Excellent control of the location of the substitution on the phenyl ring is achieved and the reaction proceeds in high yield.

US Patent:

D3379590, Aug 3, 1993

Filed:

Jan 3, 1991

Appl. No.:

7/636981

Inventors:

Davie B. Lawhon - Furlong PA
James C. Rodgers - Pipersville PA
George H. Alexander - Hatfield PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

US Classification:

D10103