David R Woods

US Patent:

7269520, Sep 11, 2007

Filed:

Dec 6, 2004

Appl. No.:

11/005306

Inventors:

Thomas Marti - Mars PA, US
David W. Woods - Boulder CO, US
Steven R. Ferry - Nederland CO, US

Assignee:

Underground Solutions Technologies Group, Inc. - Sarver PA

International Classification:

G01L 1/00

US Classification:

702 42

Abstract:

Disclosed is a method that provides for the calculation and prediction of hoop strength of an expanded pipe, preferably a PVC pipe or conduit. The method includes the steps of: (a) determining hoop strength as a function of relative wall thickness; (b) determining Wall Thickness Ratio (WTR) by dividing a nominal wall thickness of the original conduit by the minimum wall thickness of the expanded conduit; (c) determining long-term hydrostatic strength by at least one of hoop testing and burst testing; and (d) applying an accelerated regression analysis to the results in step (c), yielding a Hydrostatic Design Basis (HDB). The resulting HDB may be plotted against WTR to provide the user with graphical data for use in making design decisions and choosing specific conduit for specific applications.

US Patent:

39587819, May 25, 1976

Filed:

Jan 29, 1975

Appl. No.:

5/545231

Inventors:

David H. Woods - Pittsburgh PA
Lawrence W. Anderson - Sao Paulo, BR

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

B61L 2106

US Classification:

246 34R

Abstract:

There is disclosed a train vehicle protection apparatus including the determination of train vehicle occupancy of a track circuit signal block, wherein a frequency tone speed code signal is provided to the signal block for controlling the train vehicle speed and a vital and fail-safe determination of train vehicle occupancy of the signal block is provided.

US Patent:

48162086, Mar 28, 1989

Filed:

Feb 14, 1986

Appl. No.:

6/829741

Inventors:

David D. Woods - Murrysville PA
William C. Elm - Monroeville PA
Melvin H. Lipner - Monroeville PA
George E. Butterworth - Monroeville PA
James R. Easter - Pittsburgh PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G21C 1700
G08B 2300

US Classification:

376259

Abstract:

A hybrid parallel/serial alarm management system in which sensor signals are intelligently processed to produce abnormality indication signals. The abnormality indication signals are divided into groups defined by functions of the system being monitored and are used to generate abnormality messages according to goal violation, process disturbance and process unavailability requirements for each function. Within each goal, process and support category the messages are ranked according to a predetermined local priority and chronologically within the same priority. Each function includes a spatially dedicated parallel display location which displays the highest priority portion of each category of messages associated with each function. The messages not displayed on the parallel display are displayed on a serial display unit in ranked order by category within function. Each time message space becomes available on the parallel display unit within a category, the next message with the highest priority within that category moves onto the parallel display.

US Patent:

39499596, Apr 13, 1976

Filed:

Oct 17, 1974

Appl. No.:

5/515746

Inventors:

Richard S. Rhoton - Monroeville PA
David H. Woods - Pittsburgh PA

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

B61L 2108

US Classification:

246 34CT

Abstract:

An antenna apparatus is disclosed for coupling audio frequency signals in relation to one or more vehicle track rails of a transit system for the purpose of determining vehicle occupancy of a given signal block and providing speed coded control signals to a vehicle moving along the track rail in that given signal block. It is desired that each signal block in the transit system track circuit operate with the signal level above a predetermined minimum signal level for reasons of vehicle occupational detection. The antenna apparatus is operative to enable desired adjustment of the signal level in a given signal block and in adjacent signal blocks relative to that given signal block.

US Patent:

39840735, Oct 5, 1976

Filed:

Oct 17, 1974

Appl. No.:

5/515747

Inventors:

David H. Woods - Pittsburgh PA
Robert H. Perry - Canonsburg PA

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

B61L 322

US Classification:

246 34R

Abstract:

An antenna apparatus is disclosed for improved coupling of audio signals in relation to the vehicle track of a transit system operative with steel rails and providing a reduced cost for the associated hardware and lower crosstalk with adjacent signal blocks and track rails.

US Patent:

49024698, Feb 20, 1990

Filed:

Jul 7, 1988

Appl. No.:

7/217117

Inventors:

Craig D. Watson - Monroeville PA
Mary C. Eastman - Pittsburgh PA
David D. Woods - Murrysville PA
John P. Carrera - Greensburg PA
James R. Easter - Pittsburgh PA
Melvin H. Lipner - Monroeville PA
William C. Elm - Monroeville PA
A. Dean Mundy - Gibsonia PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G21C 1700

US Classification:

376259

Abstract:

A display, a display method and an apparatus are disclosed which produce a summary display depicting function states using discrete state bars centered in one window of a two-window display. The status bars represent the states of functions in a process as determined by status decision trees. The discrete states are emphasized by reference lines which indicate the state of each function. Priority among functions is indicated by vertically ranking the bars with the most important function bar appearing at the top. Each bar includes the name of the function, the state of the function and a procedure name for a procedure which can be used to solve the problem identified. The discrete function state is also indicated by the width of the bar and the bar color. On both sides of each bar, a data quality indicator can appear when the quality of the data is less than the best. The other window on the summary display includes meters for the parameters along the active path of the status tree for the most relevant function as determined by the operator.

US Patent:

50329782, Jul 16, 1991

Filed:

Sep 28, 1989

Appl. No.:

7/414211

Inventors:

Craig D. Watson - Monroeville PA
Mary C. Eastman - Pittsburgh PA
David D. Woods - Murrysville PA
John P. Carrera - Greensburg PA
James R. Easter - Pittsburgh PA
Melvin H. Lipner - Monroeville PA
William C. Elm - Monroeville PA
A. Dean Mundy - Gibsonia PA

Assignee:

Westinghouse Electric Co. - Pittsburgh PA

International Classification:

G06F 1546
G21C 736

US Classification:

364188

Abstract:

A display, a display method and an apparatus are disclosed which produce a summary display depicting function states using discrete state bars centered in one window of a two-window display. The other window on the summary display includes meters for the parameters along the active path of the status tree for the most relevant function as determined by the operator. Each meter indicates not only the current value of the parameter being monitored but the ranges of the different function states as they correspond to the parameter being displayed by the meter. Each meter also carries a data quality indicator. A second level display is provided which depicts the status tree with the active path highlighted allowing the operator to review the decision made by the status tree. The second level display also indicates the values of the parameters used in the decision-making process and includes a miniature version of the summary display that allows the operator to continuously monitor system summary status while reviewing the second level display. A third level display is also provided which depicts detailed information on the sensor values of the parameters being monitored as well as the exact questions being answered by decision trees of the process control monitoring system along with the answers.

US Patent:

39790924, Sep 7, 1976

Filed:

Mar 3, 1975

Appl. No.:

5/554783

Inventors:

Robert H. Perry - Canonsburg PA
David H. Woods - Pittsburgh PA

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

B61L 2106

US Classification:

246 34R

Abstract:

An improved train vehicle speed control system is provided for operation in conjunction with train speed control signals and train occupancy indication signals in relation to a train vehicle track system including a plurality of predetermined track circuit signal blocks through which train vehicles pass. It is desired that a control of train vehicle speed be provided in relation to the detected occupancy by a train vehicle of a particular signal block, for maintaining train vehicle occupancy protection requirements and providing desired sequential occupancy control of the train vehicles through each of successive signal blocks through operation of provided protection signals with selected signal blocks behind the detected train vehicle. Spurious pseudo vehicle occupancy in a given signal block is detected and included in the provided train speed control in relation to that given signal block.