US972473A - Fillet for patterns. - Google Patents

Description

"WLIJAM C. RISZRIDGE. AND MILTON W. RISBRIDGR, F CLEVELND, SIGNORS OF ONEYLTHIRD 'IO B. JOHNSON, O33 CLEVELAND, OHIO.

omo, As-

. ULLET ron PA'rTERNs.

specificati@ of Letcersratent.' `lmtented. Oct. 11, 1910.

, v Application filed April 8. 1909. Serial No. 488,688.;

11o all when; it may concern:v v

lie if'linown that v:e.`l\1m.ia:\t C. Risnafnoiai and MILTON lilltstnununa, citizens of the United States, residing at Cleveland, ia theronnfy of (.irvalioga and Statoof tibio, have. invented kcertain new and useful tmpl-(nements in Fillets for Patterns, of

which the f'ollowinff is a specification.

This invention relates to nnprovements 1n filets for patterns, especially wood patterns,

. and the improvement consists in making a flexible illefI ot vegetable matter, snchpaper or pulp, and which involves a new mode ot' et'mstruction and develops new proporties` in the article made, and which in practice shows its superiority tonot only consist in greater cheapness and dur-abilita7 but also ina more eflicient action, both in application and use as compared with fillets made and used heretofore, all substantially as hereinafter described and rmore. particnlarlv pointed outr in the claims.

ln the a@companyingr drawings, Figure 1 1s a .sectional view of a pattern having;r a compound curve 'and illustrating the application of our improved fillet. thereto, and' j and il are sectional views of the .same pattern showing fillets in plain elevation and .cross eetion in different corners thereof; Fig.' 4-

a perspective view of a `portion of" the laminated product from which ourfilh-t is formed. Fig. 5 is a'A perspective view ot' a portion of a'fillct in oneV ot' its stages of manufacture, and Fig. '(5 is a cross section. of the fillet in a further stage of development. Fig. 7 is a perspective view of a short strip ot' our' improved fillet finished and as sold fo the trade.

Heretofore, fillets for patterns have been made either of wood, leather, lead or rubber and although each one named may have distinct; advantages one over tho other, each poe'ssesses certain disadvantages which limit their use. Thus, womlen fillets are not suf v ficiently flexible or pliable to conform to curved surfaces nor to different angles. therefore reqnirinpr different shapes and sizes of fillets or Special labor to fit the saaie in place. The. edges of ak fillet are necessarllv thin, and these thin edges when of wow will warp when glue is applied to 'fasten the same to the pattern.

Leather fillets contain oil or animal fat and will not always hold when glued. to

place especially when subjected to hea-tl from the sand during molding operations, and

furthermore, leather doe' not properly re# tain an alcohol shellac finish which is found necessary to apply to all patterns for their protection'and to. further facilitate the withdrawing of" the mold from the sand. Neither can leather be smoothly sant'lpapercd to maken4 satisfactory finish. Leather fillets also require special forming. fools to apply them to patterns. r`

' ltublrxr filletsl fray and lproducel `a rough job when the pattern and the fillets are sandpapered, and again, :such fillets will not take and hold shelhrc with any degree of. practi- ,cabili't-y. llubber fillets are affected by heat.

and will loosen from the. pattern if flued thereto. When softened by heat, sand` will adhere to a rubi-er fillet and destroy or make a rough mold. "`be inherent spring; of rubber fillets also tends to loosen them from the patterns, especially if' the fillet is stretched or compressed `out of' its natural shape.

Lead .fillets can not he glued, so are hammered and nailed in place which makes an uneven job. and the finishing shellac will not adhere to its surface. thas exposing the lead to hot sand which leads to rough work and a poor mold. Lead is heavy and impracticable in many instances, particularly for small or light patterns.

Now referring to our invention, we hav(l discovered that avfillet made ot' paper,

'. strawboarth pulp, or other vegetable or like fibrous material not onl)y has all the good features of the different kinds of fillets heretofore used, butin addition hae-l .several advantages over each of them without their disadvzuitagjes as enumerated, and in constructing filletV A ofrthis material we prefer to build it up in laminafions by superimposing;l layer upon layer of fine sheets 1, see Fig. 1. andcompressing them together to a compact mail?. to give a tough buty flexible or pliable bod)Y which maybe bent to curves without breaking and which is susceptible to moisture to permit a greater degree, of flexibilit \v in case of need. When dry, a fillet made and formed like vours iS readily sandpapered to au) degree tolnalie fine tuperitlg; edges adapted to merge with the pattern without a break or flaw` and being' of vegetable matter, it will take and hold'the sbt-lla(- which is always applied to patterns to ,n-oteetand smoothly finish them. Our fillet is readily glued to place and practi- 2 l Y Y s'z'mvaf j callv becomes an integral part of awoodpattern because ofjits peculiar affinity to that material when attached thereto by glue, and when shellacked will not warp or loosen during exposureto the atmosphere or to the -warni or hot sand in. founding operations.

- A paper Vor like fillet. will absorb the glue and the moisture from "the glue makes it even more pliable than naturally-and therei tively different angles to snugly fit and fill'v the same. rl`hus, a fillet having two fiat or fore can be used to great advantage onl either straight or curi-ed surfaces Without warping. InV thus applying the fillet, no tool 1s required, the pattern maker simply7 using his fingers and hands, andv because of the peculiarities of such a fillet, a filletof anyv given` angle or shape in cross section may e caused to conform to a corner of rela? .preferably a's shown in Fig. 7, and although flexible to a certain degree vis stillstiff and firm enough to retain this shape for convenience in handling.r In the manufacture of this article, a laminated straw-board or likel material B is used, see Fig. 4, which is then cut. to the triangular shape C seen in Fig.5.

The next step is to shapeV this flat sidedtriangular strip C into the crescent shape D, shown in Fig. (i, and .finally to torni the finished article shown in Fig. 7, with two right angled flat faces k-.and --3-, and a curved face -l. By this inode of construction, sha1" straight edges 5 are obtained and alt ough of paper or pulp said edges are not ragged or will not break down, one `reason being that each superimposed sheet a contributes tothe strengthening of the next and being thin, each sheet is necessarily sharp the full length of the stri at either edge thereof. Then the fillet is g ued into place upon atterri lf, the same maybe sandpapered wit out leaving ragged edges;

in fact a laminated fillet of paper lends itself admirably to the making of a une smooth surface without ridge or offset at the joints, and our fillet may be rounded or sandpapered down to any angle or shape, the *A Y same as wood.

Briefly recapitulating, our improved filletV has these advantages; 1t is by nature a non conductor of lient and therefore retains its adhesion perfectlyY whenapplied tothe pattern regardless o many conditions to which the pattern may be exposed; it will absorb strongly fortify it in bo v and thereby as-y sure its adliesiveness to the pattern toV be come an integral part of the vpattern more completelyvthan otherwise; it will flex or bend within limits when dry to `conform to various sha wed and forms of patterns and which flexibility may ybe further enhanced when dampened by' the application of water or steam or by the mere use of the glue which adheres it to the pattern; its relative esy angles though set to any given degree will 1 i change and adapt themselves to corners of different angular degrees; it will take a tine finish without fraying at the edges when sandpapered, and it will take and retain'the protecting coat of shellac which is necessary to the fillet and the pattern for molding purg poses. Y

y What we claiiii-isz g v, v

1. A fillet consisting of numerous sheets of fibrous material cemented to etherl in block form and the edges of the fi et liam-v fered at. an inclination the full depth of the fillet from its middle to its opposite edges.

2. Arllet. consisting of numerous sheets of fibrous material cemented one ii on the other to the desired thickness in bloc and the edges of said sheets chamferedntf at an inclination te they plane'of said sheets from the middle at one side to the edges of form,

thefothcr side and adapted to be bent from I its middle to approximatelyV crescent shape,

whereby all the layers in the fillet are bent` correspondingly Vand the integrity of the structure ismaintained.

In testimony whereof. we affix our signatures in presence of two witnesses.

WILLiAM o. inserimenti. l MILTON W. RISBRIDGER.

' Witnesses:

M. Fismiii,`

F. C.A MUssUN.

so sufficient glue when a pliedr .thereto *to

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