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Publication numberUS267326 A
Publication typeGrant
Publication dateNov 14, 1882
Filing dateSep 8, 1882
Publication numberUS 267326 A, US 267326A, US-A-267326, US267326 A, US267326A
InventorsNewton B. Childs
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 267326 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No Model.)


Patented Nov. 14,- 1882-.




SPECIFICATION forming part of Letters Patent No. 267,326, dated November 14, 1882.

Application filed September 8. 1882.

To all whom it may concern:

Be it known that I, NEWTON B. UHILDS, of Kansas City, State of Missouri, have invented a certain new and useful Improvementin Drain Tiles orPipes, of which thefollowingis a specification.

The invention relates to that class of pipe which is made of a roll of sheet metal, with a layer of cement or asphaltum between the layers of the metal roll; and the invention consists in making a strip along the finishing-edge of the metal sheet gradually more pliable or yielding toward the edge than the rest or principal part of the sheet, as hereinafter described.

The accompanying drawings illustrate the invention.

Figure 1 represents a portion of the metal sheet from along the edge referred to. Fig. 2 is a perspective view of the metal sheet partially rolled, as in forming pipe.

A designates the metal sheet, usually made of wrought-iron. In forming pipe the sheet is wound around a mandrel and then upon itself, a layer of cement or asphaltum being interposed between the layers of metal.

In the manufacture of pipe of this class sheets of metal of uniform thickness and strength have been used, and a difficulty is experienced in the tendency of the finishingedge of the sheet to straighten or spring back ott' the roll from elasticity. I overcome this difficulty by forming slots or perforations (N0 model.)

through a part of the sheet along the finishingedge, so as to weaken its strength or elasticity as compared to the rest of the sheet.

B designates the punctured part, and b the slots or perforations, which are commenced back some distance from the edge, where they may be made scattering, and as they nearthe edge they may be increased in length ornumber, thereby graduallylesseniug the elasticity, and finally substantiallydestroying itentirely near the extreme edge, so that it will have no tendency to spring off when the roll is completed.

I am aware that perforated metal sheets have been used heretofore in the manufacture of pipe of the class mentioned; but the perforations have not been made in arelative part, as compared with the rest of the sheet, with a View to effect the result secured by my invention, nor has such result been effected in this manner, to my knowledge.

What I claim is-- In the manufacture of cement or asphaltum pipe, the sheet of metal having a portion along its edge provided with slots or perforations, wherebysuch perforated portion, as compared with the rest, is graduallyrendered non-elastic, for the purpose specified.



S. F. Soo'rr, W. H. WHITEsiDu.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2478712 *Apr 3, 1947Aug 9, 1949Crosley Broadcasting CorpElectrodynamic phonograph pickup
US3613738 *Jul 29, 1969Oct 19, 1971Sonoco Products CoConvolutely wound tube having readily conformable inside edge portion and method for making same
US3983905 *Jul 30, 1971Oct 5, 1976Sonoco Products CompanyConvolutely wound tube having readily conformable edge portions
US5100496 *Nov 19, 1990Mar 31, 1992Mark MitchellSystem for fabricating a convolutely wound tube
US5273605 *Jan 30, 1992Dec 28, 1993Mark MitchellSystem for fabricating a convolutely wound tube
US5927344 *Jan 3, 1996Jul 27, 1999Nobileau; PhilippeSubsea flexible pipe
Cooperative ClassificationH01L23/49572, C25D1/08