Daniel A Macdonald

US Patent:

43792421, Apr 5, 1983

Filed:

Nov 3, 1980

Appl. No.:

6/203059

Inventors:

Daniel J. MacDonald - Brookfield WI

Assignee:

Litton Industries Products, Inc. - Beverly Hills CA

International Classification:

H02K 4902

US Classification:

310105

Abstract:

An eddy current coupling has rotating and non-rotating flux paths to use the rotating portions as both magnetic and mechanical members, reduce physical dimensions of the coupling, and improve heat dissipation from the coil. The coupling (10) has an inductor (20) mounted on the input shaft. A magnetic rotor (22) is mounted on the output shaft with poles (30, 32) spaced from the inductor. A field coil (36) is positioned radially inwardly from the rotor and generates a flux, causing torque transmission between the inductor and rotor. A stationary field coil support (38) is mounted in proximity to the rotor poles for providing a stationary flux return path between the poles. The support is positioned with respect to the rotating element of the coupling, so that these elements may provide a rotating flux return path in parallel with the stationary flux path of the support.

US Patent:

43586953, Nov 9, 1982

Filed:

Nov 3, 1980

Appl. No.:

6/203060

Inventors:

Daniel J. MacDonald - Brookfield WI
Thomas H. Jones - Wauwatosa WI

Assignee:

Litton Industrial Products, Inc. - Beverly Hills CA

International Classification:

H02K 4900

US Classification:

310105

Abstract:

An eddy current coupling has telescoping input (12) and output (18) shafts to form a shunt (72, 74, 76) for the magnetic flux (78a) of the coupling around a bearing (66) between the shafts. This avoids the increased friction and heating effects and the magnetization of the bearing occurring when the bearing is exposed to the flux.

US Patent:

44928904, Jan 8, 1985

Filed:

May 18, 1983

Appl. No.:

6/495809

Inventors:

Daniel J. MacDonald - Brookfield WI

Assignee:

Litton Industrial Products, Inc. - Beverly Hills CA

International Classification:

H02K 300

US Classification:

310184

Abstract:

A stator winding configuration employs graded, overlapping stator winding coil groups. The outer coils of the coil group have a reduced number of turns with respect to the center coil or coils of the group. The coil groups have an expanded coil group width. The outer coils of adjacent, expanded width coil groups are overlapped by placing the reduced turn outer coils in common slots in the stator core.

US Patent:

44619944, Jul 24, 1984

Filed:

Mar 19, 1982

Appl. No.:

6/359701

Inventors:

Daniel J. MacDonald - Brookfield WI

Assignee:

Litton Industrial Products, Inc. - Beverly Hills CA

International Classification:

G01P 348
H02K 1742

US Classification:

324174

Abstract:

The tachometer of the present invention has a stator member with a pair of opposed stator elements. The stator member is mounted on the apparatus. Windings are provided on the stator elements in which the electric signal is generated. A magnetic means is provided for establishing a magnetic flux between the stator segments. For this purpose, magnets may be mounted on the exterior of the stator segments and the portions of the apparatus adjacent the segments used as the flux return path. Or, magnets may bridge the two stator segments. A magnetically permeable rotor is mounted on the apparatus shaft. The rotor may be formed of steel laminations with no rotating winding and has a plurality of peripheral projections that alter the reluctance of the magnetic path in the teeth as they rotate, inducing a speed responsive signal in the windings. The maximum speed of the rotor is limited only by the strength of the steel.

US Patent:

46833927, Jul 28, 1987

Filed:

Apr 26, 1982

Appl. No.:

6/371900

Inventors:

Daniel J. MacDonald - Brookfield WI
Thomas H. Jones - Wauwatosa WI

Assignee:

MagneTek, Inc. - Encino CA

International Classification:

H02K 4902

US Classification:

310105

Abstract:

An eddy current coupling has a field coil (42) for magnetically coupling an inductor drum (26) and rotor (28). The thickness of the supporting arm (48) for the coil increases in a step-wise manner in a direction away from the end of the arm. The diameter of the adjacent portions (30) of the rotor is reduced in a corresponding manner to provide a plurality of air gaps (54a, 54b, 54c) across which the flux passes in radial directions. The flux passage and heat removal characteristics of the coupling are enhanced.

US Patent:

20210073821, Mar 11, 2021

Filed:

Nov 23, 2020

Appl. No.:

17/101816

Inventors:

- SINGAPORE, SG
Kenneth Mages - Chicago IL, US
Jan Drake - Seattle WA, US
Daniel J. MacDonald - Seattle WA, US
Scott Charles Baisch - Sammamish WA, US
Alex Benjamin Engelberg - Everett WA, US
Paul Murray - Redmond WA, US
Alan J. Morgan - Chicago IL, US

Assignee:

VERRENCY HOLDINGS LIMITED - SINGAPORE

International Classification:

G06Q 20/40
G06Q 20/34
G06Q 20/38
G06Q 20/36
G06Q 20/32
G06Q 20/02
G06Q 20/20
G06K 19/077
G06Q 20/10

Abstract:

Payment devices and the systems and methods for securely managing financial transactions using the payment devices are provided. In one implementation, a portable proxy device comprises a memory configured to store a plurality of credentials. Each of the plurality of credentials pertains to one of a financial credential, an identification credential, or contractual credential. The portable proxy device also includes at least one interface, wherein each of the at least one interface is configured to communicate one of the plurality of credentials to an external device to complete one of a financial function, identification function, or contractual function.

US Patent:

20170076291, Mar 16, 2017

Filed:

Aug 24, 2016

Appl. No.:

15/245519

Inventors:

- Douglas, IM
Kenneth Mages - Chicago IL, US
Jan Drake - Seattle WA, US
Daniel J. MacDonald - Seattle WA, US
Scott Charles Baisch - Sammamish WA, US
Alex Benjamin Engelberg - Everett WA, US
Paul Murray - Redmond WA, US
Alan J. Morgan - Chicago IL, US

International Classification:

G06Q 20/40
G06K 19/077
G06Q 20/10
G06Q 20/20
G06Q 20/34

Abstract:

Payment devices and the systems and methods for securely managing financial transactions using the payment devices are provided. In one implementation, a portable proxy device comprises a memory configured to store a plurality of credentials. Each of the plurality of credentials pertains to one of a financial credential, an identification credential, or contractual credential. The portable proxy device also includes at least one interface, wherein each of the at least one interface is configured to communicate one of the plurality of credentials to an external device to complete one of a financial function, identification function, or contractual function.