Steven J Webster

US Patent:

6446102, Sep 3, 2002

Filed:

May 21, 1999

Appl. No.:

09/316892

Inventors:

David L. Kryger - Chelmsford MA
Steven Webster - Raymond NH

Assignee:

Schneider Automation, Inc. - North Andover MA

International Classification:

G06F 501

US Classification:

708208, 341 96

Abstract:

A method and a device for high-speed scale conversion wherein a value N within a range of N1 and N2 is converted into a small value M within a range of M1 and M2. The method includes the step of obtaining an approximate value of M by loading the value (N-N1+2 ) into a multi-bit shift register and right-shifting p bits. A binary search process is then used to determine the error value between the actual value of M and the approximate value of M. By avoiding actual multiplication processes, the conversion can be carried out using low-cost electronic hardware such as a microprocessor or a PROM to carry out the binary search process, a shift-register to obtain the approximate value of M, a multiplexer to receive an analog input data N and an A/D converter to convert the analog input data N into a digital data N.

US Patent:

6448920, Sep 10, 2002

Filed:

May 17, 2000

Appl. No.:

09/573098

Inventors:

Steven Webster - Raymond NH
Richard H. Breinlinger - Hampstead NH

Assignee:

Schneider Automation, Inc. - North Andover MA

International Classification:

H03M 112

US Classification:

341155, 341118

Abstract:

A first system is provided having a plurality of analog input signals for a plurality of analog input devices. Each analog input signal has an analog input signal value. The first system converts each analog input signal value to an ultimate digital input value. The first system has an input converter for converting each analog input signal to a digital input signal having a digital input value. The digital input value directly corresponds to the analog input signal value. The first system also has a conveying means for conveying the analog input signal value as an ultimate digital input value without performing any additional conversion. A second system is also provided having a plurality of analog output signals for a plurality of analog output devices. Each analog output signal has an analog output signal value, and each analog output signal value is converted from an initial digital output signal value. The second system has a receiving and conveying means for receiving the initial digital output signal value, and for conveying the initial digital output signal value as a conveyed digital output signal value, without performing any conversion.

US Patent:

7051143, May 23, 2006

Filed:

Jun 25, 2001

Appl. No.:

09/888158

Inventors:

Steven Webster - Raymond NH, US
Randy Dircks - Chester NH, US
Ken Wester - Nashua NH, US

Assignee:

Schneider Automation Inc. - North Andover MA

International Classification:

G06F 13/14

US Classification:

710305, 710315, 710306, 709153

Abstract:

The present invention is directed to facilitating communication within an automation system having a plurality of networks and network protocols. Specifically, a Modbus network is operably connected to a network. A fieldbus coupler operably connected to both networks having a program facilitates communication within the automation system wherein devices connected to the network can be accessed for monitoring and/or controlling via Modbus commands. The fieldbus coupler (FBC) program accepts a Modbus function code containing one or more embedded message of varying types. The FBC program using additional information contained in the Modbus function code and the message type reads or writes only the required information to and from the field devices. This specific read or write request of the information and the embedding of more than one message type reduces overhead and bandwidth usage, thus improving bus response time and efficiency.

US Patent:

20030040816, Feb 27, 2003

Filed:

Jul 12, 2001

Appl. No.:

09/903899

Inventors:

Paul Wolejko - Newburyport MA, US
Steven Webster - Raymond NH, US
Allan Pfeiffer - Melrose MA, US
Jean-Francois Rolland - Rueil Malmaison, FR

International Classification:

G05B011/01
G05B013/02

US Classification:

700/053000, 700/052000, 700/018000

Abstract:

A control system having an input and an output module connected to a communication bus or network. The input module is responsive to a signal that represents a condition. In response to the condition, the input module transmits the representative signal onto the communication bus. The output module includes a reflex function. The reflex function converts the representative signal into a state signal. The output module is capable of transmitting the state signal onto the communication bus.

US Patent:

48925080, Jan 9, 1990

Filed:

Jun 13, 1989

Appl. No.:

7/365380

Inventors:

Robert Ryan - Ashby MA
Steven Webster - Newburyport MA
Richard Prouty - Gloucester MA
Peter Rosa - Norwell MA

International Classification:

F16H 704
B61B 1200

US Classification:

474101

Abstract:

An improved safety control mechanism for a pulley apparatus of the type comprising main support bars having at least two wheels mounted at their centers a spaced distance apart between the bars and a swing arm assembly pivotally connected to the bars at a point between the centers of the wheels, the swing arm assembly comprising a pair of arms straddling opposing surfaces of the bars and pivotally connected to the bars by a main pivot mechanism extending through complementary aligned apertures in the arms and the bars, the improvement comprising a second bolt mechanism extending through a second complementary aperture disposed in either the bars or the arms and a slot disposed in the other of the bars or the arms; the second aperture or the slot provided in the bars being disposed in the second distance between the center mountings of the wheels; the second aperture or the slot provided in the arms being aligned with the other of the second aperture or the slot provided in the bars with the arms and the bars connected by the main pivot bolt; the slot having an arcuate engagement surface which follows the pivot of the arms and engages the second bolt mechanism against detachment of the arms upon failure of the main pivot bolt; the second aperture and the slot being disposed around the complementary aligned apertures through which the main pivot bolt extends.

US Patent:

20150347802, Dec 3, 2015

Filed:

Aug 10, 2015

Appl. No.:

14/821920

Inventors:

Xianju Wang - Bedford MA, US
Xiangyun Ye - Framingham MA, US
James A. Negro - Arlington MA, US
David Vekony - Budapest, HU
Robb Robles - Wilsonville OR, US
Jozsef Borovszki - Budapest, HU
Steven G. Webster - Tigard OR, US

International Classification:

G06K 7/14

Abstract:

Systems and methods are described for acquiring and decoding a plurality of images. First images are acquired and then processed to attempt to decode a symbol. Contributions of the first images to the decoding attempt are identified. An updated acquisition-settings order is determined based at least partly upon the contributions of the first images to the decoding attempt. Second images are acquired or processed based at least partly upon the updated acquisition-settings order.