US3457A - Railroad-cab for turning ctjsves - Google Patents

Description

UNITED sTATEs PATENT oEETcE.

JNO. H. QUAIL, OF PHILADELPHIA, PENNSYLVANIA.

RAILnoAD-CAR. Eon TURNING (JUEVES.

Specificationof Letters Patent Np.- 3,457, datedliebruary 28, 1844.

To all lwhom t may concern.' t 1 Be it known thatI, JOHN ITI.` QUAIL,"of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented `a new and :useful Improvement in Railroad,- Cars for Turning` Curves; and I do hereby declare that the following is a. full, clear, and exact description thereof, reference ibeing had tothe accompanying drawings, which form a parti of this specification, in which Figure l is an isometrical view, Fig. 2 a plan, Fig. 3 truck turninga curve.V

The nature of my invention consists in forming jointed trucks so that each wheel shall independently conform to the curve of the track and the car bodies shall` receive their support on each side over themiddle of the truck. n

The truck is formed in the following way: Each side is composed of two pieces (a) firmly connected at each end,` a brace being interposed to `keep them sufficiently far apart to admit the w'heel (b) between them; boxes are fastened to the under side of each of these pieces (c) which form the bearings of the axle of thewheel, this aXle being only long enough to project suticiently on each side for that purpose. Instead of one wheel two can be put, one before the other, in between said side pieces. These sideipieces, thus formed, are connected to those on the opposite side ofthe cars, by cross pieces (c).

The connecting joints at the four corners are made with loose inortises and tenons and have a single pin pass through them to allow the truck frame to assume a lozenge form in turning curves (see Fig. '3).

A draft or guiding bar (d) is attached to each of the cross pieces (c) by a single bolt passing down through the bar (al) and the `center of each cross piece Thisbar extends out a sufficient distance before and behind and connects by an extension joint with the bar of thesucceeding truck, which is formed in precisely the same way as that justdesc-ribed; andthe cars are connected by the projecting ends of the same bars, a bolt passing through both at their junction.

To unite the body of the car with these trucks, a common elliptic spring (c) is fastened to each of the pieces (a), forming the side pieces of the vtruck-frame; (two springs being placed on each side); these springs are united over the wheels by a bar (6),

which reaches from one to the other, and on which is a pin (e), that projects up into the frameof the car directly over lthe point of contact between the wheel and rail, and

keeps the wheels at a uniform distance apart,

while they have freedom to turn to the right or left, when they encounter a curve; the turning of each succeeding truckbeino regu-` lated by the direction taken by the rst, by means of the guide bars (d) which connect the whole train. Y

By the `above described construction the shortest curves can be encountered without difiiculty or danger, and, as the aXles do not extend across from side to side, uniting the wheels, there will be no slipping on therail,

with its attendant wear, and loss of power. a

I am aware that the trucks of railroad cars have been so arranged that the axles of the wheels could be thrown in the direction of the radii of a curve by the draft or guide bar, thewheels on opposite sides being either attached to the same, or on separate axles;

therefore I do not claim as my invention this general principle; but

"What I do claim as my invention and desire to secure by Letters Patent is The method of effecting this object by connecting the two sides (a, a,) in which the wheels work by means of the cross pieces (c, 0,) jointed to them and to the draft or guide bar, as herein described.

JOHN H. QUAIL. )Witnesses J. `J. GREENOUGH, LAFAYETTE CALDWELL.

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