HAROLD A LIST
Engineers in Bethlehem, PA

4131069, Dec 26, 1978

Aug 28, 1975

5/608596

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Bethlehem PA

B61F 308, B61F 514, B61F 524, B61F 552

105168

A vehicle running gear with articulated, self-aligning, wheelsets having means providing elastic restraint of steering moments. This means ensures that the axles of the wheelsets, while free to yaw conjointly to assume a radial position in curves, are restrained from unstable steering motions when operating in a relatively straight line at high speeds. The wheelset bearings are each carried by a subtruck which is shaped to provide a steering arm, and these arms are movably coupled in a region intermediate the axles, to accommodate conjoint yawing motions of the axles with respect to each other and in the general plane of the axles. Particular attention is given to the importance of "yaw" and "lateral" restraints, between the two wheelsets of a truck and, in each of the disclosed embodiments, resilient means of predetermined stiffness is constructed and disposed to oppose departure of the arms from a position in which the wheelsets are parallel, while other resilient means reacts between the steering arms, in the region of their coupling, and opposes differential yawing, or lateral motion of the axles, across the line of general vehicle motion. Elastomeric pads or blocks are disclosed as providing the damping and, in some disclosed arrangements, the degree of restraint of the movements of one axle differs from the degree of restraint of another axle. In accordance with one disclosed feature, coupling is also provided between one steering arm and the vehicle body, to control yawing between the wheelsets and the body.

5174218, Dec 29, 1992

Mar 18, 1991

7/672698

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Baltimore MD

B61F 514, B61F 538

105167

A vehicle truck embodying articulated subtrucks or steering arms having a plurality of wheelsets, with steering arm interconnections establishing coordinated steering motions of the wheelsets, the truck also having elastic restraining devices for stablilizing steering and other motions of conventional rotating axle wheelsets and still further having linkage interrelating relative lateral motions of the truck and body of the vehicle, which add to the stability and steering to trucks having rotating axle wheelsets and which will provide steering for wheelsets equipped with independently rotatable wheels. A method and structure is provided for adapting or "retrofitting" existing equipped truck structures with rotating axle wheelsets in a manner to enhance the steering and stablilizing characteristics. Four-point suspension of car bodies and truck side frames adapted to function as swing hangers in truck equipped with steering is disclosed.

4938152, Jul 3, 1990

Dec 15, 1988

7/285285

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Bethlehem PA

B61F 300

105208

A multiple axle railway truck is disclosed having side frames and a plurality of axled wheelsets, with roller bearings mounted in pedestal jaws having clearance fore-and-aft of the vehicle, thereby providing freedom for relative yaw motions of the wheelsets, structure interconnecting the side frames including a transverse shear plate restraining relative fore-and-aft movement of the side frames and accommodating relative pitching movement of the side frames; flat resilient pads between the roller bearings and the base of the pedestal jaws for at least one wheelset; and a method for retrofitting existing trucks to embody the structure referred to.

4729324, Mar 8, 1988

Jun 5, 1986

6/873291

Harold A. List - Bethlehem PA

B61F 538

105168

A powered locomotive truck is disclosed, the truck having two wheelsets, each with an axle having a driving motor mounted thereon, the wheelsets being mounted in a rigid main truck frame, with freedom for relative yaw motion of the wheelsets, and each wheelset further having a steering arm or yoke movable with its wheelset during relative yaw motion of the wheelsets with respect to each other, the steering arms having an interconnection in a region between the wheelsets providing for interchange of yawing steering forces between the wheelsets.

4889054, Dec 26, 1989

Dec 2, 1987

7/127558

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Bethlehem PA

B61D 100

105167

A vehicle truck embodying articulated subtrucks or steering arms having a plurality of wheelsets, with steering arm interconnections establishing coordinated steering motions of the wheelsets, the truck also having elastic restraining devices for stabilizing steering and other motions of the wheelsets and still further having linkage interrelating relative lateral motions of the truck and body of the vehicle. A method and structure is provided for adapting or "retrofitting" existing truck structures in a manner to embody the steering and stabilizing characteristics.

4483253, Nov 20, 1984

Feb 16, 1982

6/348922

Harold A. List - Bethlehem PA

B61F 308, B61F 530, B61F 538

105167

A multiple axle railway truck having side frames with pedestals, roller bearings for the axles received in the pedestal jaws with clearance in a direction fore-and-aft of the vehicle to permit relative yawing motion of the axles. A yielding pad is provided between the bearing and the base of each pedestal jaw, and a transverse plank extends between the side frames to restrain fore-and-aft motion of the side frames and is torsionally flexible thereby permitting relative angular motion of the side frames in vertical planes.

5000097, Mar 19, 1991

Dec 22, 1989

7/455980

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Bethlehem PA

B61F 502, B61F 508

105167

A vehicle truck embodying articulated subtrucks or steering arms having a plurality of wheelsets, with steering arm interconnections establishing coordinated steering motions of the wheelsets, the truck also having elastic restraining devices for stabilizing steering and other motions of conventional rotating axle wheelsets and still further having linkage interrelating relative lateral motions of the truck and body of the vehicle, which add to the stability and steering to trucks having rotating axle wheelsets and which will provide steering for wheelsets equipped with independently rotatable wheels. A method and structure is provided for adapting or "retrofitting" existing equipped truck structures with rotating axle wheelsets in a manner to enhance the steering and stabilizing characteristics.

4706571, Nov 17, 1987

Jan 27, 1986

6/823081

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Bethlehem PA

B61D 100

105168

A self-steering railway truck having interconnected steering arms associated with the axled wheelsets and having mechanism for yieldingly resisting yawing motion of the wheelsets including at least two devices, at least one of which provides a relatively high rate of increase of resistance per unit of deflection in the initial portion of the yaw motion and at least another of which provides a relatively low rate of increase of resistance per unit of deflection in a portion of the motion beyond the initial portion.

RE29132, Feb 1, 1977

Jan 27, 1976

5/652671

Harold A. List - Bethlehem PA
Jack H. Baker - Bethlehem PA

Bethlehem Steel Corporation - Bethlehem PA

G06G 766, G01G 1302, G01G 1328

2351511

An analog electrical system utilizes a signal from a coke weighing system and a signal from a coke moisture gauge to correct for prior errors in hopper weighings due to delivery overshoot as well as moisture variations in prior batches of coke.

4781124, Nov 1, 1988

Aug 21, 1986

6/898578

Harold A. List - Bethlehem PA

Railway Engineering Associates, Inc. - Bethlehem PA

B61F 308, B61F 538, B61F 552

105168

A vehicle truck embodying articulated subtrucks or steering arms having a plurality of wheelsets, with steering arm interconnections establishing coordinated steering motions of the wheelsets, the truck also having elastic restraining devices for stabilizing steering and other motions of the wheelsets and still further having linkage interrelating relative lateral motions of the truck and body of the vehicle. A method and structure is provided for adapting or "retrofitting" existing truck structures in a manner to embody the steering and stabilizing characteristics.