William A Mcdowell

US Patent:

20050109767, May 26, 2005

Filed:

Nov 21, 2003

Appl. No.:

10/719327

Inventors:

Kenneth Fennewald - Maryland Heights MO, US
William McDowell - Aurora IL, US
Kevin Ptasienski - O'Fallon MO, US
Louis Steinhauser - St. Louis MO, US

International Classification:

H05B003/16

US Classification:

219543000

Abstract:

A heater system is provided that comprises a layered heater in communication with a two-wire controller, wherein a resistive layer of the layered heater is both a heater element and a temperature sensor. The two-wire controller thus determines temperature of the layered heater using the resistance of the resistive layer and controls heater temperature through a power source. Furthermore, a heater system using a layered heater in communication with a two-wire controller for a specific application of a hot runner nozzle in an injection molding system is provided by the present invention.

US Patent:

20070000914, Jan 4, 2007

Filed:

Sep 7, 2006

Appl. No.:

11/517434

Inventors:

Kenneth Fennewald - Maryland Heights MO, US
William McDowell - Aurora IL, US
Kevin Ptasienski - O'Fallon MO, US
Louis Steinhauser - St. Louis MO, US

Assignee:

WATLOW ELECTRIC MANUFACTURING COMPANY - ST. LOUIS MO

International Classification:

H05B 3/16

US Classification:

219543000

Abstract:

A hot runner nozzle heater system is provided with a layered heater in communication with a two-wire controller, wherein a resistive layer of the layered heater is both a heater element and a temperature sensor. The two-wire controller thus determines temperature of the layered heater using the resistance of the resistive layer and controls heater temperature through a power source.

US Patent:

20070086759, Apr 19, 2007

Filed:

Oct 17, 2005

Appl. No.:

11/252198

Inventors:

Elias Russegger - Golling, AT
Gerhard Schefbanker - Golling, AT
Gernot Antosch - Hallein, AT
Wolfgang Poschl - Abtenau, AT
Christopher Lanham - O'Fallon MO, US
James McMillin - Algonquin IL, US
William McDowell - Aurora IL, US
Kenneth Fennewald - Maryland Heights MO, US
Allen Boldt - Kirkwood MO, US
Frederic Zimmermann - Karlsruhe, DE
Reinhardt Lehnert - Ubstadt-Weiher, DE
Kevin Ptasienski - O'Fallon MO, US

International Classification:

F24H 1/10
B05B 1/24
B05B 7/22
B67D 5/62

US Classification:

392473000

Abstract:

A hot runner nozzle heater is provided that includes a sleeve defining a slot extending along a length of the sleeve. A first dielectric layer is disposed over an outer surface of the sleeve, and a resistive element layer is disposed over the first dielectric layer, wherein the resistive element layer defines a resistive circuit pattern that is preferably formed by a laser trimming process. A pair of terminal leads are secured to a portion of the resistive element layer thus defining a termination area, and the termination area is positioned proximate the slot and away from the proximal end and the distal end of the sleeve. A second dielectric layer is disposed over the resistive element layer but not over the termination area, a third dielectric layer is disposed over the termination area, and a protective layer disposed over the second dielectric layer and the third dielectric layer.

US Patent:

20070138166, Jun 21, 2007

Filed:

Feb 13, 2007

Appl. No.:

11/705884

Inventors:

Kenneth Fennewald - Maryland Heights MO, US
William McDowell - Aurora IL, US
Kevin Ptasienski - O'Fallon MO, US
Louis Steinhauser - St. Louis MO, US

Assignee:

Watlow Electric Manufacturing Company - St. Louis MO

International Classification:

H05B 3/06
H05B 1/02

US Classification:

219542000, 219494000

Abstract:

A heater is provided that includes a resistive layer formed by a layered process (e.g., thick film, thin film, thermal spray, and sol-gel) and two electrical lead wires connected to the resistive layer. The resistive layer has sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a sensor, and the resistive layer is in communication with a two-wire controller through the two electrical lead wires. Preferably, the sensor is a temperature sensor, and the heater includes additional layers formed by layered processes.

US Patent:

20080138053, Jun 12, 2008

Filed:

Sep 5, 2007

Appl. No.:

11/850447

Inventors:

ELIAS RUSSEGGER - Golling, AT
Gerhard Schefbanker - Golling, AT
Gernot Antosch - Hallein, AT
Wolfgang Poschl - Abtenau, AT
Christopher C. Lanham - O'Fallon MO, US
James McMillin - Algonquin IL, US
William A. McDowell - Aurora IL, US
Kenneth F. Fennewald - Maryland Heights MO, US
Allen Boldt - Kirkwood MO, US
Frederic Zimmermann - Karlsruhe, DE
Reinhardt Lehnert - Ubstadt-Weiher, DE
Kevin Ptasienski - O'Fallon MO, US

Assignee:

Watlow Electric Manufacturing Company - St. Louis MO

International Classification:

B05B 1/24

US Classification:

392473

Abstract:

An instrumented heater sleeve is provided that has a plurality of zones, a dielectric layer disposed over an outer surface of the sleeve, a resistive element layer disposed over the first dielectric layer, and a plurality of pairs of lead wires secured to a portion of the resistive element layer. Each pair of lead wires is connected to and corresponds with each of the zones and a protective layer is disposed over the dielectric layer. An amount of power is supplied to each of the zones and adjusted during a test run, or multiple test runs, to achieve a desired temperature profile along a heating target such as a hot runner nozzle. Methods of designing a hot runner nozzle heater using the instrumented heater sleeve are also provided.

US Patent:

42773083, Jul 7, 1981

Filed:

Jun 23, 1978

Appl. No.:

5/918259

Inventors:

Gordon K. Rusch - Downers Grove IL
Donald J. Keefe - Lemont IL
William P. McDowell - Downers Grove IL

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G21C 1700
G01T 300

US Classification:

176 19EC

Abstract:

There is provided a nuclear reactor count-factor-increase time monitoring circuit which includes a pulse-type neutron detector, and means for counting the number of detected pulses during specific time periods. Counts are compared and the comparison is utilized to develop a reactor scram signal, if necessary.

US Patent:

39420140, Mar 2, 1976

Filed:

Mar 20, 1975

Appl. No.:

5/560429

Inventors:

William P. McDowell - Downers Grove IL
James P. Bobis - Downers Grove IL

Assignee:

The United States of America as represented by the United States Energy
Research and Development Administration - Washington DC

International Classification:

G01T 300
G01T 118

US Classification:

250392

Abstract:

Logic elements are provided for a reactor period meter trip circuit. For one element, first and second inputs are applied to first and second chopper comparators, respectively. The output of each comparator is O if the input applied to it is greater than or equal to a trip level associated with each input and each output is a square wave of frequency f if the input applied to it is less than the associated trip level. The outputs of the comparators are algebraically summed and applied to a bandpass filter tuned to f. For another element, the output of each comparator is applied to a bandpass filter which is tuned to f to give a sine wave of frequency f. The outputs of the filters are multiplied by an analog multiplier whose output is 0 if either input is 0 and a sine wave of frequency 2f if both inputs are a frequency f.

US Patent:

41444540, Mar 13, 1979

Filed:

Jan 27, 1977

Appl. No.:

5/763164

Inventors:

Edward F. Groh - Naperville IL
William McDowell - Downers Grove IL
Norbert S. Modjeski - Oak Lawn IL
Donald J. Keefe - Lemont IL
Peter Groer - TN

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01N 2130
B65H 2504
B65H 2532

US Classification:

250435

Abstract:

A device is provided for transporting, in a stepwise manner, tape between a feed reel and takeup reel. An indexer moves across the normal path of the tape displacing it while the tape on the takeup reel side of the indexer is braked. After displacement, the takeup reel takes up the displaced tape while the tape on the feed reel side of the indexer is braked, providing stepwise tape transport in precise intervals determined by the amount of displacement caused by the indexer.

Author:

William L. McDowell

ISBN #:

0872499111