US1932036A - Method of making chaplets - Google Patents

Description

Patented Oct. 24, 1933 UNITED STATES PATENT ,;,-orr1;ce .METiHQD or AKmG OHAPLETS Samuel H. Gibson, Lakewood, Ohio, assignor to The Farmer Manufacturing Company; -Cleve land, 0 hio.,a corporation of ohio I i f Application January 15, 1932. Serial Nofisssgsa 4 Claims. (01. 164517) This invention relates to chaplets :for holding cores in placezinmolds, and has for its objectLthe. production of aachaplet, considered both as an. article of .manufacture and as .a method of mak- 'ing, which shallbe characterized-by strength,

simplicity and efiiciency in v the articley'a'nd by simplicity of operation and. economy of material inthe method of making. One of the features of.

improvement in the article :is the provision of means on the stem of the chaplet whereby the. portion of-such stem that extends into thecasting' Wilib effectively incorporated therewith; as well as means wherebythat portion of the chaplet which protrudes fromj the casting can be readily broken off. Another feature of improvement is the formation of the head in such a way that sand will readily find its way on both sides of the head and readily pack on both sides, thus eliminating the need for tucking the sand about the head. A further object of the method of making is the utilization of material, which would otherwise be waste, for core tins.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means and steps hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detailcertain means and one mode of carrying out thejinvention, such disclosed means and mode illustrating, however, but one of various ways in which the principle of the invention may be used.

In the drawing:

Figs. 1 and .2 are respectively a perspective view, and a side view partly in elevation and partly in section of one form of chaplet embodying my present improvements; Figs. 3 and 4 are views similar to Figs. 1 and 2, but showing a modification; Fig. 5 illustrates the steps in forming the head of the chaplet of Fig. 1; and Fig. 6 similarly illustrates the steps in forming such modified chaplet head.

Referring now particularly to Figs. 1 and 5, the base or head portion 1 of this form of chaplet comprises a fiat piece of sheet metal resembling a Maltese cross, having four arms such as 2 pointed as at 3 by the intersection of the outer cutting lines 4 and 5 of the blank as shown in Fig. 5. Each two adjacent arms have what may be termed a common side' 8, preferably of semicircularshape. The shank or stem 9 is seated in a central opening 10 and upset above and below the head 1 as shown at 11 and 12 to maintain a firm position .with respect to the head. At a disthe portion of the stem whichwill'remain' in the v casing, notches 17 are formed, preferably bylindentations to insurefirm engagement of the cast metalwiththesterh.

. The modification-shown in Figs. .3 and :4 includes a base or head 21, which may be of any convenient 5 form, but isi-here-ishown-as a Latin cross with pointed ends.. A stem 22 is secured to the center. of the. base: by suitable means such as upsets 23 and 24. The stem 22 is relieved, or indented,as at 25 for breaking at the surface of the casting, and is surrounded by a collar 26 just above 25. For a short distance above the collar 26 the stem continues at full diameter andthen is reduced as shown at 2'7 up to slightly below the top 28, which is again of full diameter. Thus shoulders are left I at each end of the reduced portion, and this arrangement gives a firm engagement of the stem in the metal ofthe casting.

In forming the various upsets, indentations and notches, any suitable machinery of well known 0 type may be employed and these operations therefore need not be described for the present purpose. However, for forming a head such as that shown in Figs. 1 and 5, or the modified form shown in Fig. 6, I prefer to use a fiat strip of metal 5 such as 30 or 31 and to feed the same through a press which at one operation will punch three holes such as 32 and 33 in triangular arrangement and a smaller opening 10. These successive punching steps result in what may be described as a diamond-shaped series of holes in which the holes 32 which form two points of each diamond are adjacent the respective edges of the strip 30 and the holes 33 those which form the other two points are longitudinally disposed along the center of the strip. Each one of the series 33 is common to two of the diamonds. The small holes 10 are on the center line of the holes 33, midway between each pair. At the end of the strip 30 the blank for each chaplet head 1 is severed 1 chaplet head except the side pieces 36. The reiv moval of material at 32 forms the side openings 8 leaving the head 1 in a shape that combines a suflicient' bearing surface with a minimum blocking effect upon the packing of sand under the 5 head. Thus the extension of the arms 2 gives a firm bearing on the sand, but the openings 8 permit sand to get in against both faces of the arms so that tucking is not required. In making the heads shown in Fig. 3 the method is the same as just described, and is illustrated in Fig. 6. This needs no explanation beyond calling attention to the fact that the resulting core tins 39 are square. I

It will be understood that the exact form of heads shown in Figs. 1 and 3 is not essential and that the principle of this invention, both as ,to

article and method, may be applied to various other suitable forms of heads.

From the foregoing it will be seen that I have;

produced a simple and eiiicient chaplet combining a maximum of. bearing surface with a minimum of resistance to packingor tucking of the sand.

about the head and that I have devised a method of manufacturing the heads, which'results in high efiiciency in the use of metal. 7

Other forms may be employed embodying :the

features of my invention instead of the onehere.

steps equivalent to those stated in the following claims. 1 V i I therefore particularly point out anddistinctly claim as my invention:

1. A method of making chaplet heads and core tins which comprises punching from a strip of metal circular disks at longitudinal intervals in three rows, two of said rows being along there spective edges and one down the center, the edge punchings being transversely aligned, "and the center punchings being intermediate of the edge punchings, then trimming the edges 1ongitudi-' nally through the diameters of the edge holes,

and severing the remaining central strip trans- "versely through the diameter of each hole of the the openings formed bysaid punching operation andtransversely to intersect others of said openmgs.

3. A method of. making chaplet heads which includes punching blanks from astrip therebyleaving relatively narrow divergent connected"v arms, andsevering the ends ofsaid arms, thereby, separating the heads from the strip. i 109 4. A method of making chaplet heads which includespunching blanks'from a strip in groups of three at an angle of 45 across said strip and cutting. through theopenings'so formed,the cutting through of the middle openings of each 5 group being on lines at 90 across said'strip and the cutting through the end openingsof each group being on lines longitudinal of the strip.

- SAMUEL GIBSON.

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