US2049886A - Chaplet - Google Patents

Description

Patented ug. 4, 1936 UNITED: STATES PATENT' orner Y 4V52,049,8zi6.` v Y oHAPLiii'rv 1' Y l rGeringe H.` -A`ngell Qleveland and Harvey i v v Lorenz, ,ClevelandHeights Ohio, assignors to Angell Nail & .Chaplet-Company, Cuyahoga Heights, Ohioa corporation of Ohio Application May-6, 1935-, serial No. 19,974 s claims. (oi. 224-184) f This invention relates to chaplets such. as are used in metal foundriesfor theA purpose of positioning the core in a mold.'i More's'pecically, the invention is directed to comparatively heavy chaplets for use where the metal is to be cast with considerable thickness 'ofwall.

The objects of the invention: are to provide such a chaplet which will very effectively posi-f tion the core, supporting its weight and preventing its flotation inthe molten metal until the metal has solidified, but on the other hand is so arranged that the stem of the chaplet will effectively fuse with the metal and make a per-y fectly tight engagement While the supporting action is still effective.

Our chaplet is illustrated in the drawing hereof, is hereinafter more fully described, and its essential novel characteristics lare summarized in the claims.

The drawing illustrates our invention embodied in a chaplet of the double-headed type. Fig. 1 is a. side elevation of such chaplet; Fig. 2 is a plan thereof; Fig. 3 is a longitudinal central section, as indicated by the line 3-3 in Fig. 2; Figs. 4 and 5 are cross-sections on the correspondingly numbered lines on Fig. 1.

In e'ach of the views, I0 indicatesI the chaplet post or stem and 20 each of the two heads .abutting the ends of the stem and preferably homogeneously united therewith. These heads are preferably nat members of any desired contour, being shown as square. The stem lil is cylindrical where it joins the heads, as indicated at Il. At the central region, the stem is provided with a radially extending annular web I2. In the region between the annular web and the cylindrical fportion, the exterior of the stem is fluted at I3, the flutes as shown being nclined. The flutes on one side of the central rib incline in one direction and those on the other side in the other direction, vin herringbone fashion, as clearly shown in Fig. 1.

. It results from the fiuting that a cross-section through the stem in any region between the central-rib and the cylindrical portion presents the contour of a conventional star, as indicated by the cross-sectional views Figs. 4 and 5.

'Ihe chaplet may be readily made by threadrolling the stem and thereafter fastening the head plates to opposite ends of the stern. This may be done by riveting, but is preferably accomplished by a welding operation, to form thereby a homogeneous unit. In some instances the stem will be provided with only one head. After the head or heads have been applied to the formed stem the unit isV complete, though if desired it may thereafter be Vcovered with a readily vfusiblev metal which is `a rust-preventer, as, for instance, tin or copper.

y It will be seen that when the chaplet described 5 isused in metal founding, the molten metal as it surrounds the stem will result in the fusing of the'redgesof the annular rib I2 and the ridges ofthe utes i3, `.thus making ka very tight, homogeneous connelctionwithout melting the general 10 body of the stem,"so that the support of the core remains effective.

The flutings, which come to rather sharp ridges at their edges as illustrated in Figs. 4 and 5, result in the melting of' the ridge portions so 15 that a very homogeneous connection is made with the metal. Should there be any passageway in the metal adjacent the remaining stem,

this is interrupted by the annular rib l2, which reduces the chance of any such passageway resulting in the finished product. By making the annular ribs inclined, they engage different annular regions of the metal and reduce the chance of a bubble in the metal producing a blister at any ute. That is to say, if the rib should not effectively engage the metal at some region, it will at some other portion of the rib.

By making the ribs in the herringbone fashion there is no possibility of the stem, even if it becomes separated from the heads, acting like a screw in the casting, and this herringbone arrangement of the flutes also enables more ready thread-rolling of the stem. The herringbone arrangement of the ribs also imparts a whirling action to the molten metal directing the metal against both the heads and the annular rib.

In the chaplet illustrated, the spiral ribs terminate a short distance from the ends at the head of the chaplet, leaving the stems cylindrical and of less diameter than the exterior of the iiuted portion immediately adjacent the heads. 'I'his allows that portion of the molten metal which is directed by the ribs toward the heads to build up effectively at the head and in close union with the stem at the ends of the ribs, and it is believed that this acts somewhat, as a limit to further movement of metal toward the head, insuring the same compacting in the flutes leading toward the head.

Experience with our chaplet in actual casting operations and tests of the resulting product demonstrates that the chaplet effectively holds the core and very intimately unites with the cast metal, as desired. Y Y 55 We claim:

1. A solid chaplet stem adapted to carry a head on one end thereof, the stem being fluted, and provided with a transversely extending annular rib interrupting said flutings and extending outwardly beyond the outer ridges of said flutes.

2. A chaplet stem, flutings on the exterior of the stem extending in herringbone fashion from an intermediate region of the'stem.'

3. A chaplet stem comprising a central shaft, adapted to have a pair of heads homogeneously connected to the opposite ends of the stem and V- shaped flutings on the exterior of the stem extending in herringbone fashion from a central* opposite ends of the stem, the stem having a central Wafer-shaped projecting rib and having helical utings formed in the rib and inclinin'g oppositely on opposite sides'ofv the rib, said ilutings terminating at theirouter extremities in relatively sharp ridges, the stern being cylindrical beyond the ends of the flutings and adjacent the heads.:

5. A chaplet stem comprising a shaft-like member, anv annular Wafer-shaped rib surrounding said shaft adjacent the mid-point of its length, iiutings positioned on said shaft in herring-bone fashion With the apex' of said herring-bone adjacent ,the annular rib and said utings having substantially V-shaped cross sections terminating in relatively sharp outer edges, and a substantially cylindrical portion extending beyond said iiuting to the shaft end of less diameter than the outer extremities of such fluting.

6. A chaplet stem, comprising a central shaft and adapted to vcarry a head on an end thereof, a central wafer-shaped projecting rib carried on the stem and spiral flutings formed in the stem and inclining oppositely on opposite sides of the rib.

7. A chaplet stem comprising a shaft-like member, anY annular wafer-shaped rib surrounding said shaft adjacent its mid-regionjfluting positioned on said shaft on one side of said rib and merging with said rib and extending in helocoidal fashion to a region adjacent one end of said stem, said iiuting having substantially V-shaped crosssections.

8. A vchaplet stem, comprising a central shaft and Vadapted to carry a pair of heads on opposite ends of the stem, said stem comprising an annular Waferfshaped rib between ythe two ends of said stem,` helical iluting extending fromV said ribV toward one end of said stem, said iiuting terminating at its outer extremities in relatively sharp ridges and a substantially cylindrical portion of said stem extending beyond said fluting to the shaft end. i v' GEORGE H. ANGELL. HARVEY F. LORENZ.

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