US178249A - Improvement in the construction of car-wheel-annealing pits - Google Patents

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CONSTRUCTION OF CAR-WHEEL ANNEALING PITS. No.178,Z4;9. Patented June 6,1876

ATTEIRNEfiG ".FEFERS, FHOTO-UTHOGRAPMER. WASHNGTON. D C.

, 2 Sheets-SheetZ.

G. W. MOOERS.

CONSTRUCTION OF CAR-WHEELANNEALING PITS.

No. 178.249. Patented June 6, 1876.

INVENTEIRI ATTORNEY.

N. PETERS, PNOTO LITHOGRAFHEE WASHINGTON. D. C.

UNITED STATES PATENT Orrron GEORGE W. MOOERS, OF WILKESBARRE, PENNSYLVANIA.

IMPROVEMENT IN THE CONSTRUCTION OF CAR-WHEEL-ANNEALING PITS.

Specification forming part of Letters Patent No.

' March To all whom it may concern;

Be itknown that I, GEO. W. MOOERS, of Wilkesbarre, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Oar-Wheel Pits, of which the following is a specification: The object of this invention is to providea simple and eflicient means of annealing castiron car-wheels and metal disks of similar character, whose central portions are composed of metal in greater mass than the peripheral portions thereof. The principle underlying this invention is not new, the said principle having been, more or less, efficiently carried out by various means, all of which means, as well as thisinvention, seek 'to prevent the heat of the peripheral and smaller portions of the mass from escaping therefrom more rapidly than from the larger or central parts, which must always be the case, because of said difi cast. The details of the invention will now be fully described.

In the accompanying drawing, forming partof this specification, Figure l isa longitudinal section through the annealing-pit and through one wheel placed therein. Fig. 2 is an end elevation of the pit; and Fig. 3 is a plan of the pit with its plates for supporting the wheels, and having twowheels placed therein, showing the disposition of the sand used in the'annealing process.

In these figures, A A are the walls of the pit, built, preferably, of brick, but they may be made of any suitable non-combustible material, and may be shaped out of the solid earth itself. B B are cast-iron plates, resting on top of said walls, and provided with holes through their centers, whose diameters exceed the diameters of the hubs of the wheels to be placed in the pit sufficiently to allow of 178,249, dated June 6, 1876; application filed 6, 1876.

a suitable air-space around said hubs, as well as through them. (J O are wheels placed over the holes in the plates B and D represents the sand as heaped over the rims of the wheels, and between the spokes of the wheels, as it falls in natural slopes toward the hubs, leaving air-spaces around the hubs, through and between the spokes of the wheels. If the wheels be cast with a solid web, instead of with spokes, then there will still be an air-passage through the eye of thehub, but only an annular air-space around its top and bottom edge.- The web being solid, noair can pass entirely around the outside of the hub, as it does around a wheel provided with spokes.

annealing, and suitable and uniform contraction, of all parts of the wheels while cooling in said pit, is as follows: The wheels being already-cast and suificiently solid for removal from their molds, are taken therefrom while red hot,'and placed, as shown in the drawing, upon the plates B in the pit A. A proper quantity of sand is then packed over the rims of the wheels and over their spokes or webs, and extended up to within the desired distance of the hubs. The cores of the hubs are then removed, leaving the airspaces in and around said hubs, as already described. The circulation of the air will be as indicated by the arrows in the drawing. The operation being thus completed, the annealing forces will go wheels are cool enough to be taken from the pit. No unequal contraction having taken place, the whole mass of metal composing a wheel will be of homogeneous structure, without internal strain or external contortion, crystallization and molecular distribution taking place to the best advantage for the strength of the metal.

and around hubs of wheels in a specially-constructed oven, especially provided with a cope, and hearth and pipes and dampers cona much greater cost, both of time and materials, than the pit'herein described, and is not adapted to the varying sizes of.wheels by a simple interchange of plates, as is the wheelpit forming the subject of this invention. The

The operation of this pit in effecting the on without further care or attention, until the I am aware that air has been forced through nected to a chimney. Such an oven involves.

simplicity, facility, and cheapness of its construction, its efficiency and its ready manipulation, constitute the chief merits of this invention.

Having thus fully described this improved annealing-pit, as of my invention, I claim- In an annealing-pit, and in combination with the walls A, the removable supportingplate B, provided with a central opening of a size varying with that of the wheel or other casting to be annealed, substantially as herein described. V

In testimony that I claim the foregoing as my own'I aflix my signature in presence of twowitnesses.

GEORGE W. MOOERS.-

Witnesses O. B. SUTTON, E. THOMAS.

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