US1587901A - Metal casting - Google Patents

Description

D. CORDINO METAL CASTING Original Filed August 1. 1924 m/mw 7 ,v 6 2 9 1 00 m m I H J Patented June 8, 1926.

ITEE) STTES DOMINICK COR-DINO, 0F PLYMOUTH, MASSACHUSETTS; ELMER L. BRIGGS EXECUTOR.

OF Tit-IE WILL OF DOMINIGK CORDINO, DECEASED.

METAL CASTING.

Original application filed. August 1, 1924, Serial No. 729,499. Divided. and this application filed April 10,

My invention relates to metal castings and to the methods of making the same, and consists of improvements upon the inventions described and claimed in the two Letters Patent of the United States issued to me and dated and numberedrespectively, 1,456,868 dated May 29, 1923, and 1,456,869 dated May 29, 1923, and of certain novel devices and instrumentalities employed iii the process of casting metals.

The objects of my invention, among other things, are to accomplish all the advantages of the inventions of my said two Letters Patent in a more eflicient and economical manner and with more simple and inexpensive devices; some of the other objects are to provide a chaplet of novel construction, to cast lugs with openings therethrough and at any desired angle to the main body of the casting, and to form such lugs at a greater variety of elevations above the main body of the casting than has heretofore been attainable.

As stated in the specification of said two Letters Patent, it is well known that in fastoning panels to stove doors, and in securing together fixtures of various kinds in gas and oil stoves and other castings for the purpose of concealing the fastenings on the face of the work, it is customary to cast a lug or lugs on the inside of one casting and to drill and tap a screw threaded hole therein for the reception of a bolt or screw. These means are subject to a number ofobjections, and among them are: first, the danger of forcing the drill through the casting and thereby destroying or defacing it; secondly, of breaking the tap by not judging the dis tance accurately and by driving it against the bottom of the hole. In some situations it is awkward to use the drill and tap be cause of difficulty of access to the particular position of the lug, all of which accentuates the risk of forcing the drill through the casting and breaking the tap, and also makes accurate drilling and tapping difiicult, if not impossible.

It is often necessary or desirable to have the lugs elevated above the pattern at different heights, either by raising the chaplet on a slight support or by setting it deeper Serial No. 22,080.

into the pattern, both of which can be accomplished by this invention more conven iently and efficiently than by any means heretofore employed.

In the accompanying drawing illustrating some of the devices and instrumentalities employed by me in practicing my invention, Fig. 1 is a perspective view of an attachment to be secured to the pattern used in forming the mold for the casting; Fig. 2 is a perspective view of my improved chaplet to be incorporated into the casting during the molding process; Fig. 3 is a perspective view of the chaplet after the mold has been formed and is ready for the pouring of the metal; Flg. 4t is a perspective view of a lug having my chaplet cast therein, and Fig. 5 is a vertical section of the lug shown in Fig. 4. Fig. 6 is a perspective view of the chaplet supported at an angle on the pattern. Fig. 7 is a casting embodying my invention, having several lugs formed thereon.

Similar numerals indicate corresponding parts throughout all the figures of the drawmg.

In my present invention I dispense with the use of a nut, and make the chaplet of thin sheet metal and of different form and of less metal than the chaplet shown in my said two Letters Patent. I have discovered that it is unnecessary to use a core in any portion of the chaplet in forming the mold for the casting, as the sand will flow into the chaplet and fill it when the mold is being formed with the exercise of ordinary care and skill. v

The first step in my improved process is to secure to the pattern one or more attachments 16 like that shown in Fig. 1, made of any suitable material, preferably brass, the number and location of these attachments being governed by the requirements of the form of a particular casting. The attachment 16 preferably has a depression 13, and is provided with a slit or narrow recess 13 on each side of the depression 13. The slits or narrow recesses 13 are adapted to receive the free ends of the chaplet 9, fitting snugly therein, and the recesses 13 are of suflicient depth so as to enclose the ends of the chaplet above the holes 9, 9 The provision of the depression 13 in the attachment 16, makes it practicable to use a lug of less height than heretofore, and still to avoid a contact between the end of the screw or bolt and the bottom of the lug.

Fig. 7 illustrates a casting 8 designed to have another casting or panel secured to it at the four points indicated by the lugs 19. In molding such a casting as 8, there would be four of the attachments 16 secured to the pattern in the same relation, of course, to eachother as the lugs 19, on the casting shown in Fig. 7. Before making the mole a chaplet 9, shown in Fig. 2, made of sheet metal or other suitable material, is inserted in each attachment 16 on the pattern. The chaplet 9 is preferably made of sheet iron, in the top of which a hole 18 is punched and the metal swaged into a tubular clownwardly extending portion 12, which is screw threaded internally to receive the bolt 15 shown in Figs. 4 and 5.

The pattern with its attachments 16,as many as may be required in a given instance, and each attachn'ient containing a chaplet mounted upon it as described, is then placed in the molding sand in the usual manner for casting with the attachments 16 on the up per side of the pattern. In forming the mold the sand will fill the chaplet 9 and thedepression in the attachment 16, and when the cope is raised from the drag, the chaplet 9 being light and loosely resting in the attachment 16, is lifted by the cope to which it adheres, carrying the sand which fills it and that which fills the depression 13 in the attachment 16. The pattern is then removed from the drag, the cope is closed and the metal is poured in the usual manner. 'By reason of the holes 9 in the chaplet 9, being closed by the attachment when the mold is being formed, they are free for the molten metal to enter during the casting with the result that lugs like the lugs 19, shown in Figs. 4 and 5, are cast in which the chaplet forms a bridge open on both sides and with .sufiicient space beneath it for the bolt or screw 15 to enter withoutthe end coming in contact with the bottom of the lug after being turned down so as to tightly secure any casting to the lug which may be desired. It is obvious that any one of variety of small perforations or openings in the ends of the chaplet through which the metal may flow, will accomplish the purpose of the round holes 9, 9

Referring to the casting 8 in Fig. 7, or similar castings it is understood that each of the lugs is to be constructed as above cescribed with a screw threaded hole 18 in its top to receive a screw or bolt 15 for the purpose of securing a casting or any other part thereto, as stated in the specification of my said two Letters Patent.

My invention is adapted to provide a lug ee /e01 upon a casting at any angle to the main body of the casting that may be desired. In forming a lug at any angle other than a right angle, it is necessary to employ certain modifications or" the means above shown and described. Referring to Fig. 6, in the attachment 16 the recesses or slits 13 extend through the edges of the attachment. The stud 20, secured to or made a part of the pattern is provided to support the chaplet in the recesses 13 at the angle required for the lug to be cast. The recesses 13 are open through the edges of the attachment, so as to permit the chaplet to be lifted out of the attachment and to be withdrawn therefrom by the cope after the mold is formed. The stud 20, while located in front- .of the opening 1% on one side of the chaplet,

is of such small dimensions as not to interfere with access to said opening for all practical purposes. Y

It is obvious that by this method of casting, the holes in the lugs are accurately locate-d, that all danger of defacing the casting by accidentally drilling through it is obviated, and as no tapping of the thread is required, there can be no breakage of the taps. The screws or bolts employed are selected with reference to their length, so as not to extend to the bottom of the space 1% shown in Figs. +1 and 5. The screws or bolts are readily removed when occasion requires separation oi the parts for repairs or other purposes.

It is evident that there is also an advantage in this invention where it is necessary to provide a screw threaded hole in a casting in a place inconvenient of access to a drill and tap.

The provision of the open space 11,

through the lug, is of great importance in case it becomes necessary to remove the bolt or screw for the purpose of repair, for the reason that the end of the screw or bolt is free from contact with the casting, is accessible "from both sides of the lug, and does not become adhered thereto by reason of corrosion. Vlhere no such space is provided it is then impossible to remove the bolt when desired without breaking it or destroying the casting or redrilling and retapping the lug.

In the construction shown in my said two Letters Patent, the chaplet is formed with a base portion, and is made of sheet metal suiilciently thick to provide for drilling and tapping a screw thread in the top, or instead thereof a nut is employed in the upper part of the chaplet. v

In the present invention the chaplets may be made of different thicknesses of sheet metal so as to adapt them to any desired purpose. No base portion is required for the chaplet and no core is needed within the chaplet in practicing my invention. It is to be understood, of course, that the chaplet is buried in sand as shown in Fig. 3, after the mold is formed and before the metal is poured, and that only the extremities of the chaplet, where the holes 9, 9 are formed, are uncovered and exposed to the molten metal in the casting process. By reason of the molten metal flowing around the free ends of the chaplet and through the holes 9 the chaplet becomes an integral part of the casting and forms a lug of great strength and security.

What I claim and desire to secure by Letters Patent is:

1. An article of manufacture consisting of a channel shaped chaplet for use in castings, having a screw threaded hole in its top.

2. An article of manufacture consisting of v a channel shaped chaplet for use in castings,

having a screw threaded hole in its top and openings near its extremities.

3. In a metal casting, a lug having an opening through the same, and .a screw threaded hole extending into said opening.

4. In a metal casting a lug having an opening through the same, and a screw threaded hole extending into said. opening in a direction transverse to the axis of said opening.

5. I11 a metal casting, a lug having a chaplet incorporated therein, said lug having a screw threaded hole formed therein during the process of casting, the axis of which hole is located at an acute angle to the body of the casting.

In testimony whereof I have hereunto set my hand this 21st day of March, 1925.

DOMINIOK CORDINO.

Certificate of Correction.

.s hereby certified that Letters Patent No. 1,587,901, granted June 8, 1926, the application of Dominick Cordino, of Plymouth, Massachusetts, for an pro-venient in Metal Castings, was erroneously issued to Elmer Li. Briggs, XGCHtOl of said Cordino, whereas said Letters Patentshould have been issued to Dom Cordino, as assignee of the entire interest in said Letters Patent, as shown by the records of assignments in this oilice; and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 3d day of August, A. I). 1926.

[SEAL] M. J. MOORE,

Acting Commissioner of Patents.

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