US62678A - Andrew patterson - Google Patents

Description

' A.- PA-TTERSUN.

DIE FOR MAKING BELLS No. 62,678. Patented Mare 5, 1867.

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'PA'.I"IERSON, OF BIRMINGHAM, PENNSYLVANIA.

Letter.9 Patent No. 62,678, dated March 5,1867.

- mrnovsusnr IN DIES FOR MAKING BELLS.

-Be it lrnown that I, ANDREW Pursusommf Birmingham, Allegneny county, State of Pennsylvania, have invented ,certain -new and useful Improvements in Manufacture of Bells; and'I hereby declare that the following is a full, true, and exact description of the same, reference being had to the accompanying, drawings, which form part of this specification, and to the letters of explanation marked thereon.

Y -My invention consists in forming bells of the ordinary shape from circular plates of steel by subjecting them-to pressure, while rendered pliable by heat, between suitably formed :dies. The general principles which enter into the mechanical operation are old and well understood by workers in sheet metal, and need no especial explanationl I Y i In making bells by my invention, take a circular plate of steel about one-fourthlargerin diameter than the intended bell, and having heated it to about a cherry red, I apply the pressure of a drop-press to it placed between a pair of dies similar .to those represented by the sectional drawing, fig. 2, a b; I then reheat and strike it between another pair of dies, which more'nearlyapproximate the intended shape, and repeat this process of heatingand'press ng each time with another pair of diesuntil the proper shape of bell is obtained.

' Figure 1, in thc'drawings, represents a sheet of steel before it has received the impressof any of the dies. Figures 2, 3, 4, 5, 6, 7 are sectional views of a series 'of dies, such as I use in forming ordinary-shaped bolls, a indicating the femaleand 6 the male die in'all the drawings.

Figure 8 is a section of a bell-formed from a: sheet of metalby passing through this series of dies in the manner described. 4 I I v I I It will be seen that each pair of diesinto which the heated platc is put for stamping, has a different form and shape from the pair of dies in which it was last impressed, thus passing through the various series of dies until it has passed. through the last pair, which give it the shape dcsiredofa perfect bell. It will be 'further seen that the diesallow a thickening of the lower rimor edge of the bell at its mouth, which, strengthens the bell at this point, where the greatest danger and liability tocrack exists, and whioh increases the "tone of the bell greatly.

, The advantages of my improvementare economy of production, with greater variety and depth of tone, and greater strength and durability, than can belobtainediwith thesame weight of metalwhen the bells are formed by casting. Bells made by i'ny process are especially. adapted to be arranged in musical-chimes, as the tone' or note desired can be rcadilyapproximatod by changing the temper or hardness of the steel. After being formed, these-bellsmay he finished lay-plating with finer metals, as is done with cast-bells when ornament is' desired. i

I am aware that it is not new .to form vessels by gliesfrotn sheet metal. I do not,'th erefore, claim as now,

P stampingivcssels from sheet metal by means of dies, but what I do claim as new, and desircto secure by Letters Patent,is---. I

The manner herein described of forming bells out of circular sheets of steel, by means of the action of a series of dies of diifcrent shapes, constructed and operating on the material substantially as described, so as to condense or thicken the outer portion of said sheets, thus forming the bells with a gradually increased thickness from their apex or-ccntre to thc b ascvor uiouth, as described and set forth,

A. PATTERSON.

Witnesses:

A. B. Srnvsuson, JAMES Mouton

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