US689688A - Corrugated boiler furnace or flue. - Google Patents

Description

No. 689,688. Pate nted Dec. 24, 1981. J; uonmzn. CORRUGATED BOILER FURNACE 0R FLUE.

' (Application filed Kay 24, 1901.)

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WITNESSES IN VENTOH UNITED STATES PATENT OFFICE.

JOSEPH NODDER, OF SHEFFIELD, ENGLAND, ASSIGNOR TO JOHN BROWN AND COMPANY, LIMITED, OF SHEFFIELD, ENGLAND.

GOR RUGATED BOILER FURNACE OR FLUE.

SPECIFIGATION forming part of Letters Patent N 0. 689,688, dated December 24, 1901.

Application filed May 24,1901. Serial No. 61,785a (No model.)

To all whom it may concern-. by forming them into the required cylin Be it known that I, JOSEPH NODDER, forge drical bodies the parts of larger diameter are manager, a subject of the King of Great Britthicker than the parts of smaller diameter, the ain and Ireland,1'esiding at Atlas Wrks,Shefthickness gradually, increasing from the parts 5 field, in the county of York, England, have at B to the'tops of the corrugations at A,

invented certain new and useful Improvewhereby the strength is-madeproperly proments in Corrugated BoilerFurnacesorFlues; portional to the working pressure throughout, and I do hereby declare the following to be a and injurious local expansion and contraction full, clear, and exact description of the in during work are avoided.

i0 vention, such as will enable others skilled in Having now particularly described and asthe art to which it appertains to make and us certained the nature of this invention and in the same. What manner the same is to be performed, I

Although in corrugated boiler furnaces and declare that what I claim is fiues the parts of larger diameter should be 1. The herein-described method of manu- 15 proportionately thicker than the parts of facturing corrugated boiler furnaces or flues,

smaller diameter in order to be capable of consisting of rolling a flat plate with corruwithstanding equally well the Working presgations of great thickness and alternating sure in such furnaces and flues as hitherto flat portions of less thickness, such thickness made by expanding the corrugations from a gradually decreasing from the corrugations 2o plain cylinder, they are thinner at their parts to the fiat portions and then forming the plate of larger diameter than they are at their parts so rolled into a cylindrical boiler-flue with the of smaller diameter. fiat portions parallel with the axis of the fine,

The object of this invention is to overcome substantially as described. this defect. 2. As a new article of manufacture, the 25 In the accompanying drawings, Figure 1 herein=describedcylindricalcorrugatedboiler represents, in longitudinal section, a part of furnaces or lines, consisting of a plate having a plate for aboiler furnace or flue in accordcorrugations and flat portions, parallel with ance with this invention. Fig. 2 is a longi the axis of the flue alternating with the tudinal section, on a smaller scale, of part of corrugations, the parts of largest diameter 30 atube length made from my improved plate. being of the greatest thickness and the parts 76 Fig. 3 is a cross-section on the line 3 3, Fig. 2. of smallest diameter being of the least thick- The aforesaid defect is overcome accordness, the thickness gradually increasing from ing to this invention by rolling a fiat plate the parts of smallest diameter to those of with alternate corrugations Aand flat or aplargest diameter, substantially as described.

35 proximately fiat and thinner parts B, which In testimony whereof I affix my signature in the finished flue are parallel with its axis, in presence of two Witnesses.

as shown in the drawings,the thickness gradu- JOSEPH NODDERP ally increasing from the parts at B to the tops Witnesses: of the corrugations at A, so that in the fin- HAROLD P. BUBDEKIN,

4o ished furnaces or flues made from such plates BENJN. CHEETHAM.

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