Howard S Irwin
Accountancy in Wilmington, DE
License number
Delaware CC-0000606
Issued Date
Sep 26, 1985
Category
Accountancy
Type
C.P.A. Certificate
Address
Address
2
Wilmington, DE 19808
Professional information
Resilient Center Bearing Assembly
US Patent:
3986752, Oct 19, 1976
Filed:
May 9, 1975
Appl. No.:
5/576227
Inventors:
William Henry Bogar - Newark DE
Howard Dale Irwin - Wilmington DE
Howard Dale Irwin - Wilmington DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
B61F 516, F16C 1704, F16C 2708, F16F 144
US Classification:
308137
Abstract:
A railway car center plate assembly comprising a truck bolster having a bowl-shaped truck center plate and a body bolster having secured to its underside a body center plate. The body center plate has a flat surface from which extend downwardly two substantially perpendicular, concentric, cylindrical flanges encircling a bore, the diameter of the outermost flange being such that its outer vertical surface is encompassed by the inner vertical surface of the flange on the truck center plate. Positioned between the body center plate and the truck center plate is an annular, synthetic elastomeric bearing pad which is located within and substantially fills the annular space between the flanges of the body center plate and under load contacts the vertical surfaces of the flanges of the body center plate.
Drag Force Knotmeter
US Patent:
4122711, Oct 31, 1978
Filed:
Dec 29, 1977
Appl. No.:
5/865532
Inventors:
Howard D. Irwin - Wilmington DE
International Classification:
G01C 2110
US Classification:
73184
Abstract:
A drag force knotmeter for indicating the speed of a boat in water, especially in the range of 1-12 knots is a device attached to the boat by a flexible line and trails an elastomeric line attached to a drag. The drag is a rigid rod having an eye on one end and a circular disk on the other end. Said circular disk being attached to the rod by its center. The drag is heavier-than-water and is attached to the elastomeric line through its eye. System friction is minimized by maintaining an overall straight line configuration from the drag to the point of attachment to the boat. The elastomeric line isolates sudden surges on the drag from the indicator on the knotmeter.
Resilient Center Bearing Assembly
US Patent:
RE30461, Dec 30, 1980
Filed:
Aug 2, 1977
Appl. No.:
5/821317
Inventors:
William H. Bogar - late of Newark DE
Howard D. Irwin - Wilmington DE
Howard D. Irwin - Wilmington DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
B61F 516, F16C 1704, F16C 2708, F16F 144
US Classification:
308137
Abstract:
A railway car center plate assembly comprising a truck bolster having a bowl-shaped truck center plate and a body bolster having secured to its underside a body center plate. The body center plate has a flat surface from which extend downwardly two substantially perpendicular, concentric, cylindrical flanges encircling a bore, the diameter of the outermost flange being such that its outer vertical surface is encompassed by the inner vertical surface of the flange on the truck center plate. Positioned between the body center plate and the truck center plate is an annular, synthetic elastomeric bearing pad which is located within and substantially fills the annular space between the flanges of the body center plate and under load contacts the vertical surfaces of the flanges of the body center plate.
Railway Car Truck Side Frame
US Patent:
4351242, Sep 28, 1982
Filed:
Feb 19, 1980
Appl. No.:
6/122726
Inventors:
Howard D. Irwin - Wilmington DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
B61F 500
US Classification:
105206A
Abstract:
A railway car truck side frame is formed of compression and tension members and double shear webs joined together by welding so as to form a box-beam wherein the welds joining the main structural units are so disposed as to be stressed in shear rather than tension or compression to provide for optimum fatigue performance.
Resilient Center Plane Assembly
US Patent:
4174140, Nov 13, 1979
Filed:
Sep 13, 1977
Appl. No.:
5/832974
Inventors:
William H. Bogar - Newark DE
Howard D. Irwin - Wilmington DE
Howard D. Irwin - Wilmington DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
B61F 516, F16C 1704, F16C 2708, F16F 144
US Classification:
308137
Abstract:
In railway car center plate swivel connections, horizontal and vertical loads are distributed more evenly along the bearing surfaces when the body center plate assembly includes an annular, elastomeric pad having horizontal and vertical bearing surfaces, in which the elastomeric pad has a centrally disposed opening, is positioned concentrically around and adjacent to a partial center plate which fills the centrally disposed opening.
Railway Car Truck Bolster
US Patent:
4311098, Jan 19, 1982
Filed:
Feb 19, 1980
Appl. No.:
6/122725
Inventors:
Howard D. Irwin - Wilmington DE
Assignee:
E. I. DuPont de Nemours and Company - Wilmington DE
International Classification:
B61F 100, B61F 516
US Classification:
105226
Abstract:
A railway car truck bolster is formed of channel cross section tension and compression members and a reinforced web joined together by welding to form a reinforced I-beam as the primary structural unit for the bolster. The welds joining the main structural elements are disposed to be stressed in shear rather than tension or compression for optimum fatigue performance.