US1416343A

US1416343A - Process of casting corners for metal beds

Info

Publication number: US1416343A
Application number: US522796A
Authority: US
Inventors: Irving A Featherman
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-12-16
Filing date: 1921-12-16
Publication date: 1922-05-16
Anticipated expiration: 1939-05-16

Description

I. A. FEATHERMAN.

PROCESS OF CASTING CORNERS FOR METAL BEDS.

APPLICATION min 050.16, 192;.

1 %1 343 PdtentedMayifi 22k users Kiwi a 1a v I R L'A. FEATHERM AN.

PRQCESS 0F. CASTING CORNERS FOR METAL BEDS. APPLICATION men use. 16, 1921.

1,416,343, Patented 16,1922.

3 SH T SHEE Fig.4 figofi W, awn/ 69% l. A. FEATHE RMAN.

PROCESS OF CASTING CORNERS FOR METAL BEDS.

APPLICATION FILED DEC. 16. I921.

1,416,343., v Patented May16,1922.

3 SHEETS-SHEET 3.

IRVXNG A. FEATHERMAN, 0F BROOKLYN, NEW YORK PROCESS OF CASTING CORNERS FOR METAL BEDS.

Application filed December 16, 1921.

To all whom it may concern:

Be it known that I, IRVING A. FEATHER MAN, a citizen of the United States, residing at Brooklyn, in the county'of Kings and State of New York, have invented a certain new and useful Improvement in Process of Casting Corners for Metal Beds, of which the following is a specification.

My invention relates to the manufacture of corners for metal beds and has for its ob- .ject to provide a process whereby the said corners can be formed accurately and so that the surfaces will be true and square with relation to the angles forming the side or foot rails of the bed. These corners are usually formed in castings molded in molders sand. It is well known that castings formed in this way vary due to the amount of rap given to the pattern by the molder and in addition to the variation in size which is extremely undesirable, there is the further objection that the sides are not true. In devices of this character it is also customary to provide a staple which is adapted to enter an opening in the corner post of the bed, it being then secured by driving a key or passing a bolt through the said staple. It is in the present method of construction difiicult to hold these staples true in the casting operation and also there is continual trouble due to the crystallization of the ends of the staple if not the complete melting away of them caused by the molten metal impinging thereon when poured from the ladle. the corners is experienced when it is desired to cast them to form a complete frame. In such a case the angle iron which forms one of the bed rails is frequently cast integral with the corner and the angle which extends at right angles thereto is riveted or bolted to the corner which has been cast on the end of the first angle iron. It is extremely de sirable to produce these frames so that they are square and so that they will remain so because of the fact that springs are attached to them. It is well known however, that if one of these frames is dropped and strikes on one of its corners it will be sprung out of a true rectangle into a more or less diamond shape. Numerous attempts have been made to unite the two angle irons at the corner by a single casting, operation but without success. This is due to the impossibility of taking the frame out of the mold until it has entirely cooled off because the casting opera Specification of Letters Patent.

Another difficulty in the casting of Patented May 16, 1922.

Serial No. 522,795.

tion necessarily expands the metal and al though the frame can be so that each end is in a different mold all right, it is virtually impossible to take them out without waiting for the molds to cool off. It is, of course, obvious that such a practice would be en-- tirely impractical and not commercially possible. The foregoing, of course, is true only where a chill is employed for a mold, for obviously, it is apparent to persons skilled in the art that it would be impractical. to construct such a frame in sand molds.

My invention has for its object to provide a chill which when used renders it possible for one to cast the corners of an entire frame, forming the angle iron rails into a homogeneous mass with the metal from which the corners are formed, and which can be readily and speedily removed from the chill.

Another object of my invention is to provide a chill in which the corners can be cast on the bed rail where a staple is required and in which this staple will not be inj'uriously affected by the introduction of the molten metal.

For the purpose of illustrating a concrete form for carrying out my improved process I have illustrated in the accompanying draw- 'ing a chill which enables the operator to castview of the chill. Fig. 5 is a cross-section taken on the lines 5-5 in Fig. 4. Fig. 6 is a front elevation of the chill. Fig. 7 is an end view of Fig. 6 taken from the end opposite the pivot. Fig. 8 is a top or plan view of a fragmentary portion showing a corner of the frame after the casting is completed.

Fig. 9 is a side elevation of the same. Fig. 10 is a perspective view showing how a com plete frame is made. Fig. 11 is a sectional view on line 1111 in Fig. 12. Fig. 12 is an end view of the chill showing the shield for protecting the staple. Figs. 13 and 14 show a modified form of corner.

Similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawings the chill comprises a block 10, which is formed with a base portion 11, and a vertical wall 12, which has pivotally attached to it a top plate 13, which is mounted upon a belt 141, whichl extends through the wall 12, and is secured in position by means o1 a nut 15. The wall 12, is cut away at 16, forming a shoulder upon which a corresponding shoulder 17, formed on the top plate 13, rests. The angle iron forming the rail 18, rests upon the plate 11., its vertical portion resting against the vertical wall formed below the shoulder 16. This shoulder, as clearly seen in Fig. 1 projects outwardly from the wall 12. forming a space intermediate the angle and the vertical part of the wall 12. The top plate 13, is cut away as at 19, so as to provide a recess which will be filled by the molten metal 20, which enters through an opening 21, formed at the junction between the top plate 13, and theplate 12, in a position just above the point of union of the two angle irons forming the side and

end rails

18 and 22. A matrix 23, is placed. in the chill on. the base plate 11, this matrix being provided with a tapered recess 21, to form the tapered lug 60, which is used to connect the frame of the spring with the corner post of the bed, which is standard construction. The matrix 23, is held from movement by means of a pin 25, which is fixedly mounted in the wall 12, and is further held in position by means of a tongue 26. which extends upwardly from the top of the matrix block 23, and enters into a corresponding formed in the top plate 13. The matrix. 23, is further secured in position by means oil? a block 27, which rests against the side of the matrix block 23, its -forward corner 28, extending beyond the matrix block and constituting; a shoulder which forms a recess in which the metal 29, flows. The face 30, of the block 27, forms a support for the vertical wall of theangle iron22, which vforms the end or side rail, as the case may he, of the frame, The top plate 13, provided witha downwardly depending portion 31., which is .provided with a shoulder 32, the vertical portion'of which bears against the face 30, of the block 27, and the horizontal portion rests upon the upper edge 01 the vertical portion of the angle iron 22, holding it firmly in position, which thus ensures atrue and accurate casting-,- Obviously the down wardly depending portion 31, its lower wall cut away forming a shoulder 33, which rests'against the top and edge of the horizontal portion of the angle iron 22, which further assists in holding it firmly in posi tion. A similar shoulder 3 1, is formed to receive-and hold .the horizontal wall and edge of the angle iron 18. The end 35 of the angle iron 22 is cut away to accommodate the end 36 of the angle iron 18 as clearly inrecess dicated in Fig. 41 so that they can lay in the same horizontal plane. The downwardly depending portion 31, is also cut away opposite the end face of the matrix 23 so as to form an enclosed chamber into which the molten metal is poured, to form the corners. It will be apparent to persons skilled in the art that there must be four of these chills, one for each corner, which are mounted upon a frame 11, each chill being spaced the proper distance and bolted or otherwise secured in position to form the corners of a frame of the desired size. If the corner was cast with the chill as so far described, the expansion 01 the metal would be so great that it would'be impossible to remove the frame from the our chills until it had cooled Oil. For while the plate 13 swings in the arc of a circle so that it moves away from the expanded metal, still the matrix expands by the heat absorbed from the molten metal and it and the corner of the metal which bears against the block 23 at the corner 28 and holds the block 23 so tightly it is quite impossible to remove the frame from the chills. 1 have overcome this objection by providing the bloclr 27, witha mounting which permits it to swing away from the, matrix, and, of course, from the metal forming the corner at the shoulder 28. 1V accomplish this by providing an outwardly extending lug 37, whichis fastened:

fixedly to the face 38, ofthe block 27, and extends downwardly to a point below the lower wall of the block 27, and is hinged by a pin or pivot 39, to a lug40, which ex tends outwardly from the vertical edge 11, 01" the base 11, and is fixedly attached thereto in any suitable or convenient manner. The center of the pin or pivot 39, is and must be located so that the block 27 will move on an arc of a circle which will take it away from the wall of the matrix block 23, from the moment that it moves upwardly. By providing this swinging movement of the block 27, I find that itis possible to remove the frame even while the metal forming the corners is visibly red hot, so that by following my method of providing a chill, the walls of which are capable of moving away from the'metal forming the casting, it becomes possible to cast a frame for metal beds which will be true and accurate at all times and under all conditions.

My means of avoiding the crystallization of the staples when casting the corners to accommodate bed posts is better seen in Figs. 11 and 12. I p

When casting a corner in this type of chilhl provide a block 70, which 'is located above the staple 72, so that'as clearly seen in the drawing the metal which enters through the opening 71, does not strike upon the staple but strikes upon the block 70, and then flows around it into the chill and fuses the staple, and the incoming molten metal into a homogeneous mass, but at a temperature which is not great enough to melt off the staples or to crystallize them. By using a chill instead 01 a sand mold for this purpose it will be apparent to persons skilled in the art that I am able to produce a corner in which. all of the surfaces will. be true and accurate and the staples can be securely held in proper position. ll hen a corner or" the type shown in Figs. 13 and 14: is to be cast, I find it desirable in practice to punch holes in the angle iron 75 in which the staple 72 is mounted. This assists in holding it true and also in fusing it with the angle iron and molten metal.

Having described my invention what I regard as new and desire'to secure by Letters Patent is:

1. A. chill for casting corners for metal beds comprising a base plate, a vertical wall thereon, a top plate pivoted to said vertical wall, a matrix on said. base, an angle iron in which'is mounted a staple in said chill, and means to shield the staple from the molten metal adjacent its point of entrance.

2. The method of forming a frame for metal beds, the sides and ends of which are formed of angle irons, which consists in notching adjacent ends of said angle irons,

placing said adjacent ends together in a chill mold, one end of which is formed by a matrix, one end and top and one side 01": which are pivoted to swing away from the frame when moved, flowing molten metal into the mold to unite the frame parts, opening the mold and removing the frame.

8. The method of forming a frame for metal beds, the sides and end of which are formed of angle irons, which consists in notching adjacent ends of said angle irons, placing said adjacent ends together in a chill mold, one end of which is formed by a matrix, one side of which is pivoted to swing away from the frame when moved, flowing molten metal into the mold to unite the frame parts, opening the mold and removing the frame.

4:. A chill comprising a base plate, a vertical wall thereon, a top plate pivoted to said vertical wall, a matrix located on said base, a downwardly depending portion on said top plate recessed to form a chamber, a swinging block which holds said matrix from lateral movement and means to hold adjacent ends of angle iron bars within said chamber.

In testimony whereof, I have signed the foregoing specification.

IRVING A. FEATHERMAN.