US1329409A - Flexible pipe-covering - Google Patents

Description

P. C. JACOBS.

FLEXIBLE PIPE COVERING.

APPLICATION FILED NOV. 6, I9I9.

1 ,329,409. I Patenfed Feb. 3, 1920.

UNITED STATES PATENT OFFICE.

PHILIP C. JACOBS, OF CHICAGO, ILLINOIS, ASSIGNOR TO H. W. JOHNS-MANVILLE COMPANY, A CORPORATION OF NEW YORK.

FLEXIBLE PIPE-COVERING.

Specification of Letters Patent.

Patented Feb. 3, 1920.

To all whom it may concern:

Be it known that I, PHILIP C. JACOBS, a citizen of the United States of America, residing at Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Flexible Pipe-Coverings, of which the following is a specificat on.

My invention relates to a protective covering for pipes which covering is of low heat conductivity so as to reduce losses resulting from the conduction of heat to or from the contents of the pipe and is especially designed for use on small pipes which are curved or bent and which require a flexible pipe covering which can be installed or built up upon them. Pipes of this kind, such as the numerous curved pipes employed in the cab of a modern locomotive, are also exposed to frequent contact with the persons operating the locomotive and accordingly it is necessary that the pipe covering shall be tough and not easily fractured by blows or friction from passing persons or objects. My invention meets all these requirements and is simple and economical. The preferred form of structure embodying my invention is illustrated in the accompanying sheet of drawings, in which Figure 1 is a vertical section through a pipe with my invention applied thereto, the parts being broken away;

Fig. 2 is a side View of the same, and

Fig. 3 is an enlarged detail cross section of the material which forms the basis of my covering.

Throughout the'drawings, like reference characters indicate like parts.

l, is a section of steam pipe usually from an inch to two and a half inches in diameter, which sizes are best adapted to receive my covering to advantage. 2, is a strip of special material Wound spirally upon the pipe 1. This special material preferably consists of a strip of asbestos cloth 6, to which a somewhat thicker layer of flexible asbestos felt 8, is fastened by some mineral fireproof cement such as indicated by the thin line or layer 7, in-Fig. 3. As shown, this strip is Wound upon the pipe wlth the felt face 8,

next to the pipe, but of course it may be.

otherwise arranged; 3, is another strip of plain asbestos cloth which is wound upon the covering 2, the spirals of the two strip windlngs running in opposite directions, as clearly shown in Fig. 2.

To further bind and protect the covering, I next apply a spiral winding of wire 4, the spiral preferably running'in the same direction as that of strip 2, and then to hold this wire firmly in position and protect the cloth 3, and harden its exterior surface, I apply a thin covering ofa fireproof cement 5, which dries on exposure to the air and becomes hard, thus protecting the insulation beneath from abrasion, the action of the elements, and any tendency to unwra This in turnmay be painted with a bla aspha ltic paint to make it conform to the finish of any exposed iron piping in the locomotive cab or other compartment in which my invention is being employed. This asphaltic paint also gives waterproof quality to the outer covering. It may take the place entirely of the fireproof cement 5, in certain cases. The paint film would be so, thin and be so largely absorbed by the cement covering that I have been unable to show it clearly in the drawing.

The resultant covering so formed is of I low heat conductivity so that the loss of heat from the. steam conveyedthrough the pipe 1, is much reduced and the operatives are protected from contact with the hot steam pipes.

The materials employed in forming the covering are so flexible that they can be easilyapplied to the most sharply curved pipes in relatively inaccessible posltions and yet be made to completely cover and thoroughly protect said pipes without leaving any gaps or openings through Various subcominations of the elements above enumerated might be employed without unnecessarily employing others men-- which heat may escape.

by a, mineral cement, a covering strip of asbestos cloth spirally wound in the opposite direction, an external binding coil of wire and an external facing of fireproof cement 5 in which the wire is embedded. v 2. A built-up covering of low heat conductivity for curved steam pipes and the like 'whieh comprises in combination an interior spirailly wound strip formed of a 10 backing of asbestos cloth with a facing of flexible asbestos felt cemented to it by silicate of soda cement, and an exterior oppositely wound strip of asbestos cloth held in position by a fireproof cement.

3. A built-up covering of low heat con- 15 ductivity for curved steam pipes and the like, which comprises in combination an interior spirally wound strip formed ofa backing of asbestos cloth with a facing of asbestos felt cemented to it by a fireproof 20 cement and an exterior winding of wire held in place by an exterior layer of fireproof cement. I

' PHILIP C. JACOBS.

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