US1113500A - Foundry-flask. - Google Patents

Description

I. R. SMITH.

FOUNDRY FLASK.

APPLICATION FILED 213.16, 1912.

1,113,500. .I Patented o@t.13,1914.

WITNESSES: INVENTOH THE NORRIS PErERS 50,. PHOTO-Unio., WASHINGTON. D. C.

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BARROW COMPANY, 0F MILWAUKEE, 'i v' r f, n conronarroiv or wisconsin.

FOUNDRY-FLASK.

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:Specification of Letters Patent. 1331391113911 Oct, 13a Application lediFcbrnary 16, 1.9152.A Serial. No. 678,966.

To all Lo/*20m t may concern.'

Be it known that I, lnvino R. Smm, a citizen of the Unit-ed States, residing at Milwaukee, in the county of Milwaukee and State of `lllisccnsin, have invented a new and useful improvement in Foundry-Flasks, of which the following is a specification.

My invention relates to improvements in foundry flasks made of wrought metal and the objects of my invention are to strengthen the wrought metal against torsion and bendingwithout unduly adding to` the weight of medium sized flasks, and to utilize the strengthening means as a material addition to the handiness of the flask. These objects are accomplished by the constructions shown in the accompanying drawing which forms a part of this specification, and vin which- Figure l shows a plan view of a foundry flask embodying my invention. Fig. 2 sho-ws an end view of the flask partly in vertical section. Fig. 3 shows a modified form of theV section of the flask with the same strengthening device shown in Fig. 2. Fig. 4 shows a plan view with a modified form of the strengthening device and F ig.y 5 shows a vertical cross section through Fig. 4.

That flasks for usein iron and steel Afoundries should be made of metal is unquestionable owing tothe burning gases and molten metal in connection with their employment. rlhe general use of metal flasks has heretofore been precluded by their excessive weight, and l have found this excessive weight is due to the improper distribution of the metal in flasks as heretofore constructed in relation to the forces to be resisted. p.

ln general terms, I construct my flask with vertical walls formed of a relatively thin sheet of metal having sufficient lateral strength for sand holding purposes,l and surround these walls at about the middle of their height by a single bar of metal of sufficient strength to withstand all the torsional and lateral bending strains to which the flask is ordinarily subjected.

rlhe flask as shown in Figs. l and 2 consists of a strip of rolled steel which is cut the proper length and bent to the requisite form. rlhe guide pin plates (c) arethen riveted on, one of themcovering the joint the ends of the strip. The inturned flanges (f) are merely for the purpose of lifting the sand. it the middle'of the height `of the` flask a rib (i5) is rolled on the metal strip to resist the torsional strains and to resist lateral bending' in small flasks. In `medium sized flasks, such as are generally handled by two men when lifting olf or on, additional hand holds are necessary, and ifithe length of the flask is considerable additional reinforcement. against torsion vand bending is needed. To answer these requirements a reinforcing strip is rolled, of lsteel preferably, which strip lhas a semi-circular bead (c) provided with `flanges (c c) in the same plane and a flange (g) perpendicular to (c c). Pieces of this strip are cut oil of sufficient lengt-h to reach around one side of the flask from one guide pin plateto the other. These pieces are bent to lit the corners of the flask, and areriveted to the walls of the flask through the flanges (e c). 'lhe flange (g) around the flask or ameans forthe crane hooks to take hold of. `But fits `essential and most important feature is yto form a torsion and bending resisting bar vof the same kind as the bead (o). JAll torsional and bending strains occurring anywhere in the height of the flask ferred to this bar and still the major portion of the vertical wall of they flask is only of sufficient thickness for sand holding pur-r poses. rihis bar `also materially strengthens the corners of the flask.` As shown in Fig. 3, this bar may be applied to a plain section of metal and will be justas effective in resisting torsion and bending as it isin Fig. 2. This is of great importance as the sizes and relative proportions of flasks is almost infinite and one size of lreinforcement will answer fora wide range of flasks, whereas it would be practically impossible to make specialrolls for all sizes.

ln Figsdd and 5,. a reinforce and hand hold is shown consisting of a piece of pipe (7i) secured to the flask by clips (75),' Blocks (l) affording seats yfor the pipe may be supplied or omitted.` This pipel attachment forms a. very convenienthand' hold, a strong reinforcement against lateral bend.- ing and will assist to some extent in resist.-v ing torsion. y

Having now fully described my invention in certain forms which it maytake what l claim as my invention is:

l. A foundry flask formed of rolled metal, 1

affords a. hand hold all are effectively ref havingguide pin plates at its opposite' ends and having reinforcing bars attached on the outside of the flask at the middle of its height extending from one guide pin plate to the other.

2. A foundry flask formed of rolled metal7 having guide pin plates at its opposite ends and hav-ing reinforcing hars attached on the outside or' the flask at the middle of its i height extending from one guide pin plate to the other, said bars having projections for attaching them to the flask, and being provided with a relatively Wide projecting flange forming a hand hold.

3. A foundry llasl formed of rolled metal7 having guide pin plates at its opposite ends, and having reinforcing bars attached on the outside of the llaslz at the lniddle of its height extending from one guide pin plate to the other, said bars consisting of a curved hollow Central portion disposed with its hollow side toward the llask, and flanges on each side of said curved portion by which the bar is attached to the flask.

IRVING R. SMITH.

Vl-tnesses:

ADELAIDE TRESTER, E. O. MANKfnLow Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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