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Publication numberUS332258 A
Publication typeGrant
Publication dateDec 15, 1885
Filing dateOct 26, 1885
Publication numberUS 332258 A, US 332258A, US-A-332258, US332258 A, US332258A
InventorsChaeles Lamkin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Chaeles lamkin
US 332258 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




No. 332,258. Patented 1190.. 15, 1885 N. PETERS Halo-Lithograph Wuh'mgiur; EC.




SPECIFICATION forming part of Letters Patent No. 332,258, dated December 15, 1.885.

Application filed October 26, 1885. Serial No. 181,031.

To all whom it may concern:

Be it known that 1, CHARLES LAMKIN, a citizen of the United States, residing at Batavia, in the count-y of Genesee and State of New York, haveinvented anew and useful Improve ment in SteamPipeCoveringspf which the following is a specification.

My invention relates to improvements in non-conducting steam-pipe coverings in which mineral wool is used as a fire-proof non-conductor; and the object of my improvement is to produce a pipe-covering compact in formthat is, made complete before it is wrapped about the pipe-and will, when in position, not only serve as a non-conductor of heat, but shall also be absolutely fire-proof from heat within. I attain this object by the construction illustrated in the accompanying drawings, in which Figure 1 is a perspective view of a section of the covering as it appears when it is placed in position around the pipe, and Fig. 2 is a perspective view of the paper wrapping with the mineral wool removed.

Similar letters refer to similar parts in both views.

A represents the mineral-wool packing; B, the outer paper wrapper; B, the inner or reenforce portion'of the cover; and O, the noncombustible paper, one end of which is cemented or otherwise secured between the parts B B, as shown. This non-combustible paper is composed largely of asbestus, which, although itself indestructible by heat, has nevertheless conductive qualities in such a degree as to endanger any combustible material that may be contiguous to it while it is in a heated state.

b are indentations in the wrapping B. These indentations not only stiffen the paper, but also form dead-air spaces between the wrapping and the mineral wool. This outer wrapping is made of thick paper-board, so that any indentations or crimps that may be formed in the paper are permanently affixed. The reenforce B is also formed of paperboard, and the same is cemented to the inner surface of the outer wrapping, except at one end, which is secured to the paper 0, and that in turn is (ModeL) attached to the wrapper B, as hereinbefore mentioned.

In the manufacture of my improved covering I first out the paper-board (designated B) into strips of the necessary width to form the lap, and also for the covering of the pipe with the intervening wool. I then take enough of the non-combustible paper to form the necessary laps and to entirely encircle the pipe. After cementing the end of O to B, the menforce B is in turn secured by cement or otherwise to the parts B O, as hereinbefore mentioned.

To complete the covering, after the wrapper has been prepared, as above described, it will only be necessary, in connection with the requisite apparatus for retaining the material in proper form, to place the required quantity of wool in position between the non-combustible paper G, forming part of the strip, and the wrapper produced by the union of the parts B and B.

It will be essential in making the covering to have the part 0 of sufficient dimensions laterally to entirely encircle the heated pipe and not allow any combustible substance to come between the said part 0 and the mineral wool, as the conductive qualities of this asbestus paper may cause the ignition of any material not having the fire-proof character of mineral wool. The covering when completed is placed around the pipe by means of the longitudinal opening, and when in position the overlap is cemented to the cover proper, so as to form a continuous and solid roll.

Having now described my inventiomwhat I claim as new, and desire to secure by Letters Patent, is

The combination of the mineral wool, the indented wrapper, the re-enforce paper, and the non-combustible paper secured between the inner ends of the outer wrapping and the re-enforce paper, substantially as described, and for the purpose set forth.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4194536 *May 26, 1978Mar 25, 1980Eaton CorporationComposite tubing product
US4285369 *Jan 9, 1980Aug 25, 1981Parker-Hannifin CorporationThermal insulation enhancement
Cooperative ClassificationF16L59/14