David G Eddy

US Patent:

6809436, Oct 26, 2004

Filed:

Mar 14, 2003

Appl. No.:

10/389461

Inventors:

Shih-Chia Chang - Bloomfield Hills MI
Marie I. Harrington - Troy MI
David Sturge Eddy - Washington MI
Michael W. Putty - Eastpointe MI
Jeffrey M Kempisty - Howell MI

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

H02N 100

US Classification:

310 40MM, 310309

Abstract:

An electromagnetic microactuator having a ferromagnetic substrate, preferably steel. A plurality of layers are deposited upon the substrate including an insulating layer, a seed layer and first and second photoresist layers. The first photoresist layer provides a coil well which defines the deposition location of a coil metal. The second photoresist layer provides central and peripheral core wells which define the deposition locations of a central core and a peripheral core, respectively. The second photoresist layer intersticially fills and protectively covers the coil.

US Patent:

20050088785, Apr 28, 2005

Filed:

Oct 25, 2004

Appl. No.:

10/972848

Inventors:

Shih-Chia Chang - Bloomfield Hills MI, US
Marie Harrington - Troy MI, US
David Eddy - Washington MI, US
Michael Putty - Eastpointe MI, US
Jeffrey Kempisty - Howell MI, US

International Classification:

G11B005/55
G11B021/08

US Classification:

360317000, 3100400MM, 335289000

Abstract:

An electromagnetic microactuator having a ferromagnetic substrate, preferably steel. A plurality of layers are deposited upon the substrate including an insulating layer, a seed layer and first and second photoresist layers. The first photoresist layer provides a coil well which defines the deposition location of a coil metal. The second photoresist layer provides central and peripheral core wells which define the deposition locations of a central core and a peripheral core, respectively. The second photoresist layer intersticially fills and protectively covers the coil.

US Patent:

52338746, Aug 10, 1993

Filed:

Aug 19, 1991

Appl. No.:

7/746548

Inventors:

Michael W. Putty - East Detroit MI
David B. Hicks - Farmington Hills MI
Shih-Chia Chang - Bloomfield Hills MI
David S. Eddy - Romeo MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G01P 1509

US Classification:

73517AV

Abstract:

A microaccelerometer is provided for use in on-board automotive safety control and navigational systems. The microaccelerometer includes a central support body which is supported upon a backing chip, a peripheral proof mass which circumscribes the central support body, and at least one pair of microbridges, each of which are attached to both the central support body and the peripheral proof mass. The pair of microbridges extend outwardly in opposite directions from the central support body such that a longitudinal axis through each of the microbridges forms a common axis through the central support body. The microbridges are attached to the peripheral proof mass at the end opposite the central support body so as to suspend the peripheral proof mass circumferentially about the central support body and above the backing chip. Piezoelectric drivers and sensors are provided, respectively, for exciting the microbridges at their resonant frequencies, and for detecting changes in the resonant frequencies of the microbridges which occur as a function of acceleration of the peripheral proof mass. The sensors are connected to a feedback circuit which amplifies and buffers their output and provides feedback to the drivers to properly maintain the microbridges at their resonant frequencies.

US Patent:

41662016, Aug 28, 1979

Filed:

Jan 9, 1978

Appl. No.:

5/868078

Inventors:

William C. Olander - Birmingham MI
Douglas J. Harvey - Sterling Heights MI
David S. Eddy - Romeo MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

H01H 1900
H01H 100

US Classification:

200 19DR

Abstract:

An ignition distributor for an internal combustion engine is provided with a novel rotor electrode which substantially reduces radio frequency interference generated by spark discharges across the rotor gap. At least the tip segment of the rotor electrode is formed of a composite material consisting of a first phase of fibers of a dielectric material interspersed with a second phase of a conductive material. In operation, dielectric fibers protrude from the conductive phase into the gap promoting ionization therein so that electrical discharge occurs at voltages where radio frequency signal production is substantially suppressed.

US Patent:

20140112697, Apr 24, 2014

Filed:

Oct 24, 2012

Appl. No.:

13/659279

Inventors:

- Detroit MI, US
David Eddy - Milan MI, US
Fred Lewis - Ann Arbor MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

F16D 1/06

US Classification:

403 11

Abstract:

A chip or debris trap or collector retains chips, fragments and other debris generated when a serrated or splined, press fit connection is assembled between a shaft and another component such as a housing, gear, pulley or bearing. The chip collector includes a circumferential channel or groove disposed about the shaft adjacent the ring of serrations or male splines and an adjacent circumferential flange. An optional second channel or groove resides in the other component. As the shaft and the component are assembled, chips, fragments or other debris generated by the interference fit and axial sliding assembly of the components are collected in the channel or channels and retained there as the shaft fully seats within the other component.