US1567860A - Marking patterns and the like - Google Patents

Description

Dec. 29 1925- v 1,567,860

' a A. s. PEARL MARKING PATTERNS AND THE LIKE.

Filed 2, 1925 2 Sheets-Sheet z Patented Dec. .29, 1925 PATENT O'FFl ALLEN s. PEARL, or CHICAGO, ILLINOIS.

MARKING PATTERNS AND THE LIKE.

Application filed February 2, 1925.

To all whom it may concern:

Be it known that I, ALLEN Q. PEARL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Marking Patterns and the like, of which the following is a specification.

This invention has to do with certain improvements in the means for marking patterns used for making molds for castings, etc. The devices to which the present inventi on relate are particularly intend ed for patterns used for making the molds in sand and other similar materials, although their usefulness is not limited to such patterns, as will presently appear.

In order for the features of the invention to be better understood and appreciated, I will first explain that prior to my invention, it has generally been the custom to place individual characters on the surface of the pattern at the points where the desired markings are to appear on the finished casting.

These markings generally comprise the name of the article or the company manufacturing the same and a pattern number of similar designation. It has generally been the practice to make all of the characters as separate units and to individually attach them directly to the surface of the pattern, as by the use of shellac or the like.

The above practice is open to numerous disadvantages including the fact that the individual characters frequently become disconnected from the pattern, sometimes being lost in the end of the mold, and unless replaced on the pattern, an erroneous marking will appear on the finished casting. Besides the above objection the cost of preparing and individually attaching the different characters, and maintaining the pattern in repair, is quite heavy and burdensome.

In some cases a number of characters have been grouped as a unit in a single strip of thin sheet metal from which the different characters are raised by embossing or otherwise. lVhen using this arrangement, it has been intended that the thin sheet metal strip .shouid be directly attached to the surface of the patternby the use of nails or brads. Such surface attaclunent is open to the very Serial No. 6,227.

serious objectionthat the sand and other material soon Works in between the thin metal strip and the surface of the pattern itself resulting in the metal strip being bulged out. This in turn modifies the surface of the mold, so that when the casting is produced it is unsightly and otherwise objectionable. practicing the above system to use very thin sheet metal for making the characters in order that the body of the metal strip should not project unduly above the surface of the pattern itself, since saidmetalstrip was not countersunk into the body of the pattern.

According to my present; invention I first provide a unitary strip of metal, preferably in the form of a casting from the outer surface of which the various characters are raised or countersunk, so that when viewed from the front or outside, said strip with its characters presents identically the same appearance as it is desired should be presented by the surface of the pattern at the point of and immediately adjacent to the desired character locations. I then countersink the pattern a distance equal to the thickness of the body portion of. this strip, so that upon placing said body portion into the countersink of the pattern, its outer surface comes flush with and constitutes a continuation of the surface of thepattern at the point in question. The raised or countersunk characters of'said strip then project above or below the exposed surface of the strip and, therefore,

It has been necessary when also project or recede an equal distance above or below the surface of the pattern itself. I then secure the strip firmly in place by the use of brads or small nails driven through the body of the strip and into the material of the pattern.

.More particularly I prefer to use a strip of the foregoing nature in the form of a linotype slug or a portion of said slug, the same being made of type casting metal such as is in common use. In this connection, the slug or strip cut therefrom may be conveniently cast upon anordinary linotype machine or what is known as a Ludlow machine; but the following explanation will show that the casting o oration used for making the special slug for" e present purpose must be very material y modified.

The raised or depressed characters projecting above or below the surface of the body of the strip must appear on the slug in the same order, and must read in the same direction as the characters appear on the linished pattern.

The slug used in the present metllOd, there fore, differs from those used in printing op erations in the sense that the characters are reversed as compared to the characters of an ordinary printing slug. This fact also makes it necessary to reverse the characters in the matrices which are used in casting the slug. Consequently, a different set of matrices must be prepared and used for practicing the method of the present invention.

In order that the article itself and the method by which it is manufactured be better understood, reference may be had to the accompanying drawings in which Figure 1 shows a side view of a simple pattern havingapplied thereto a strip embodying the features of the present invention;

Fig. 2 shows a cross section on the line 2-2 of Fig. 1, looking in the direction of the arrows, but on enlarged scale;

Fig. 3 shows a face view of the matrices used in making the slur, used in the pattern of Figs. 1 and 2;

Fig. 1 shows a cross section on the line l-. l of Fig". 3, looking in the direction of the arrows, the assembled matrices being closed and the metal forced into place;

Fig. shows a face view of the slug; cast in the operation of Fig. 4:;

llig. 6 shows a cross section on the line 6 6 of Fig. looking in the direction. of the arrows;

7 shows a side view of the slug of Fig. 6 with the web partly sawed away; and

Fig. 8 shows a side view of the completed slug after the flange has been trimmed down to the desired thickness.

Referring first to Figs. 1 and 2, the body of the pattern is designated by the numeral 9. It has the strip to which the present invention relates applied to one of its smooth faces 10.

This strip includes a flange 11. preferably relatively thin and at the same time of sulficientthickness to give proper body for the characters, such as 12, which are raised from its surface. The face of the pattern is recessed or countersunk, as shown at 1.3, an amount equal to the thickness of the flange 11, so that when said flange is set into-place its exposed surface comes flush with the surface of the pattern and continues therewith, all as clearly evident from Figs. 1 and 2.

The strip is preferably held in place by a series of brads or small tacks 1 1. Owing to the fact that the flange is made of relatively soft metal, such as ordinary type metal, it is easy to drive .t'l e brads or tacks through it,

but if desired the flange may be perforated in the first instance with relatively small perforations.

Referring; next to Figs. 3 and 4, the mat,

rices for the various characters or symbols are individually designated by the numerals 15. Each of these matrices is engraved or otherwise recessed or raised to establish the desired character, but with the character reversed as compared to the desired facing of the character in the finished strip. This will all be clearly evident from Fig. 8.

After closing the matrices by the block 16, the type metal 17 is forced into the opening and into the matrices, and accordingly assumes their shape. As a result, there is produced a slug of the form and appearance shown in Figs. 5 and 6. The particular slug illustrated in said figures was produced on a Ludlow machine, but, manifestly, other forms of type casting machines may be used, if desired.

brdinarily, the flange 11, produced as above explained, will be thicker than desired in the CO1 i'oleted character strip. Further more, the web portion 17 is not desired in the finished product. Consequently, I prefer to first saw off the web portion 17, as is evident from the saw cut 18 started in Fig. 7, and afterwards I prefer to face off the back face 19 of the flange 11 leaving only the desired thickness of said flange.

inasmuch as type metal is relatively, soft, it may in some cases be desirable to electroplate or otherwise coat the bar or slug with brass or other more suitable metal. This will give it a sufficiently hard surface of sufficient thickness to withstand the service which it encounters. This treatment may be found particularly desirable in the case of blocks or slugs intended for use in connection with metal patterns.

While 1 have herein. shown and described only a single embodiment of the features of my present invention, and only a single method for practicing the manufacture of the articles, still I do not intend to limit myself to either the particular product or the particular method herein disclosed, except as I may do so in the claims.

I claim:

1. The combination with a molders pattern, of means for marking the same comprising a continuous integral type metal casting; having a relatively thin body of uni-- form thickness, and integral characters raised from or recessed into its exposed surface in the same order as the desired order of characters on the finished pattern, together with a recess in the face of the pattern of the same depth as the thickness of the body portion aforesaid, and means for securing said body portion within said recess comp-rising brads or the like, substantially as described.

2. The combination with a molders pattern, or means for marking the same comprising an integral body block of metal having characters raised from or recessed into its exposed surface in the same order as the desired order of characters on the finished pattern, together With a recess in the face of the pattern of the same depth as the thickness of the body block aforesaid, and means for securing the body block in place in the recess, to bring and retain the exposed surface of the body block in substantially con tinuous and flush With the surface of the pattern, substantially as described.

ALLEN S. PEARL.

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