Walter C Dodd

US Patent:

7434902, Oct 14, 2008

Filed:

Dec 2, 2005

Appl. No.:

11/292547

Inventors:

Richard Baker - West Lebanon NH, US
Walter Clinton Dodd - Springfield VT, US

Assignee:

Dimatix, Inc. - Lebanon NH

International Classification:

B41J 25/308
B41J 11/20

US Classification:

347 8, 400 55

Abstract:

A printing apparatus comprises a jetting assembly including a plurality of nozzles for ejecting droplets on a substrate moving relative to the jetting assembly, a mechanism for increasing the displacement of the jetting assembly relative to the substrate, and a sensor configured to activate the mechanism for increasing the displacement of the jetting assembly upon detecting a predetermined dimension of the substrate surface relative to the jetting assembly.

US Patent:

51387999, Aug 18, 1992

Filed:

Apr 12, 1991

Appl. No.:

7/685227

Inventors:

Stephen S. Buckingham - Springfield VT
Walter C. Dodd - Springfield VT
Daniel J. Keebler - Springfield VT

Assignee:

Bryant Grinder Corporation - Springfield VT

International Classification:

B24B 4900

US Classification:

51165R

Abstract:

The present invention relates to systems and methods of controlling the dressing operation of computer numerically controlled grinding machines. A contact probe is positioned relative to a dresser and contact measurements are made to determine the position of the dresser tip relative to a pivot axis about which the dresser rotates.

US Patent:

51081172, Apr 28, 1992

Filed:

Nov 28, 1990

Appl. No.:

7/619255

Inventors:

Richard E. Crossman - Leominster MA
Victor Dzewaltowski - Springfield VT
Walter Dodd - Springfield VT

Assignee:

Bryant Grinder Corporation - Springfield VT

International Classification:

B23B 1300
B24B 4900

US Classification:

279126

Abstract:

A workpart chuck centering mechanism moves towards the axis of rotation of the chuck as the chuck rotates in an eccentric non-centered position. The centering mechanism includes two independent shoes. Each shoe is driven by a servo-motor and encoder. The two shoes function in a cooperative manner to center the workpart. A sensing device monitors any eccentric movement of the workpart and controls the positioning of the shoes. The two shoes and the sensing device are mounted on a base which can pivot about the chuck axis. The directions of movement of the respective shoes are displaced 90. degree. relative to one another and intersect at the chuck axis.

US Patent:

52133486, May 25, 1993

Filed:

Apr 23, 1992

Appl. No.:

7/872928

Inventors:

Richard E. Crossman - Leominster MA
Victor Dzewaltowski - Springfield VT
Walter Dodd - Springfield VT

Assignee:

Bryant Grinder Corporation - Springfield VT

International Classification:

B23B 1300
B24B 4900

US Classification:

279126

Abstract:

A workpart chuck centering mechanism moves towards the axis of rotation of the chuck as the chuck rotates in an eccentric non-centered position. The centering mechanism includes two independent shoes. Each shoe is driven by a servo-motor and encoder. The two shoes function in a cooperative manner to center the workpart. A sensing device monitors any eccentric movement of the workpart and controls the positioning of the shoes. The two shoes and the sensing device are mounted on a base which can pivot about the chuck axis. The directions of movement of the respective shoes are displaced 90. degree. relative to one another and intersect at the chuck axis.

US Patent:

47905450, Dec 13, 1988

Filed:

Jan 11, 1988

Appl. No.:

7/142549

Inventors:

Victor F. Dzewaltowski - Springfield VT
Walter C. Dodd - Springfield VT

Assignee:

Bryant Grinder Corporation - Springfield VT

International Classification:

B23B 1500

US Classification:

279 1L

Abstract:

A workpart chuck is provided with a centering member that is movable toward the axis of rotation of the chuck as the chuck rotates the workpart in an eccentric non-centered position. As the centering member moves the workpart, a sensing device senses the extent of changing eccentric movement of the workpart and generates an electrical signal that is indicative of the extent of such eccentric movement. The workpart is moved toward the chuck axis until the signal reaches a predetermined value indicative that the workpart is rotating about its axis; i. e. , the workpart axis and chuck axis are substantially coaxial. The centering member is offset slightly relative to the chuck axis of rotation to assure that excessive movement of the centering member placing the workpart center beyond the chuck axis of rotation will not result in the workpart being driven to an extremely eccentric position and possibly even off the face of the chuck. The sensing device will detect a sudden shift of the workpart position relative to the centering member indicative of such movement beyond center, whereupon the control system will cause the centering member to retract a small distance and advance in a new attempt to center the workpart.