JOHN W WALKINSHAW
Engineering in Graniteville, MA
License number
Massachusetts 38341
Issued Date
Nov 18, 1994
Expiration Date
Jun 30, 2016
Type
Chemical Engineer
Address
Address
Graniteville, MA 01886
Professional information
Method And Apparatus For The Generation Of Ultrasonic Energy Fields Within Circular Structures Containing A Liquid
US Patent:
2002012, Sep 5, 2002
Filed:
Mar 2, 2001
Appl. No.:
09/798677
Inventors:
John Poniatowski - Annandale VA, US
Susan Poniatowski - Westford MA, US
John Walkinshaw - Westford MA, US
Susan Poniatowski - Westford MA, US
John Walkinshaw - Westford MA, US
Assignee:
Paper Quality Management Associates
International Classification:
B08B003/12
US Classification:
134/001000, 134/184000
Abstract:
A resonant chamber that produces an ultrasonic energy field about a central axis of the chamber to separate contrary matter from a working material. The resonant chamber has a circular cross section and utilizes a series of transducer elements to generate an ultrasonic transverse wave disposed about the internal longitudinal axis of the chamber. In addition, a driver circuit is provided that is able to efficiently excite the transducer elements to generate the ultrasonic transverse wave with a minimum of heat dissipation and power loss.
Methods And Apparatus For The Use Of Ultrasonic Energy To Improve Enzymatic Activity During Continuous Processing
US Patent:
2009030, Dec 10, 2009
Filed:
Jun 1, 2009
Appl. No.:
12/476010
Inventors:
Susan E. Poniatowski - Westford MA, US
John W. Walkinshaw - Westford MA, US
John W. Walkinshaw - Westford MA, US
International Classification:
C12P 19/00, C12N 13/00
US Classification:
435 72, 4351732
Abstract:
Described herein are methods and devices for increasing enzymatic activity during continuous processing by applying ultrasonic energy.
Variable Inductor
US Patent:
7242275, Jul 10, 2007
Filed:
Feb 4, 2004
Appl. No.:
10/772140
Inventors:
John E. Poniatowski - Annandale VA, US
John W. Walkinshaw - Westford MA, US
John W. Walkinshaw - Westford MA, US
Assignee:
Paper Quality Management Associates - Westford MA
International Classification:
H01F 27/28
US Classification:
336226
Abstract:
A variable inductor which avoids electrical breakdown of the insulation in the control windings when used in high power applications includes a core formed of a permeable magnetic material, the core having three legs, including a center leg and two outer legs. A main winding element comprising a main conductor is wound around the center leg of the core. A control winding element comprising a control conductor is wound in a figure-eight configuration having a first winding and a second winding around respective outer legs, the winding configuration canceling induced voltages in the first and second windings, wherein a current through the control winding element causes a change in inductance of the main winding element.