US417768A - Steam-pipe covering - Google Patents

Steam-pipe covering Download PDF

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US417768A
US417768A US417768DA US417768A US 417768 A US417768 A US 417768A US 417768D A US417768D A US 417768DA US 417768 A US417768 A US 417768A
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steam
pulp
covering
pipe
sawdust
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24562Interlaminar spaces

Description

(No Model.)
P. L. BARTLETT. STEAM PIPE COVERING.
No. 417,768. Patented Dec; 24, 1889.
wl I Invenbon UNITED STATES PATENT OFFICE FRANK L. BARTLETT, OF PORTLAND, MAINE.
STEAM-PIPE COVERING.
SPECIFICATION forming part of Letters Patent No. 417,768,dated December 24:, 1889.
Application filed "jeptember Z1, l889- Serial No. 324,654:- (No model.)
To aZZ whom it may concern:
Be it known that I, FRANK L. BARTLETT, a
v citizen of the United States, residing at Portland,in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Steam-Pipe Coverings; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.
My invention relates to a non-conducting covering for steam-pipes, boilers, &c. andthe object of the invention is to produce a fabric which may be cheaply made, easily applied, and which shall have such a structure as will prevent to the greatest possible extent the radiation of heat.
My invention consists of a steam-pipe covering the body of which is composed of wood or other pulptmixed with sawdust or other granular.material and having a laminated structure with laminations extending longitudinally or parallel with the surface, the adjacent laminae being united by the knitting together of the pulp fibers.
I have illustrated my invention in the accompanying drawings, in which- Figure 1 is a side elevation showing a part section. Fig. 2 is an end elevation, and Fig. 3 is a central longitudinal section showing the covering as applied to a steam-pipe.
The pipe-covering, as shown in the drawings, is cylindrical in form and has a center or body A of pulp mixed with sawdust in about equal proportions and laid with a laminated structure having air cells or spaces, which extend concentrically and parallel to the surfaces of the cylinder. The presence of the sawdust within the pulp forms a great number of air-cells which separate the adjacent layers of pulp. The effect of this formation on the material is to render it a perfect non-conductor of heat, the air-cells being flattened and most numerous in a transverse direction. It is also found that whereas pure pulp tends to shrink very materially when it dries, pulp and sawdust united in this manner shrink but very little. On the outside and inside surfaces of the cylinder I have formed a very thin layer A and C of substantially pure pulp, which, being more close and compact than the pulp and sawdust, entirely prevents any current of air from passing through the material transversely.
The pulp and sawdust may be mixed in any desired proportion, according to the amount of strength desired in the material; but, the sawdust being the cheaper material, it is desirable to use as large a proportion as possible. In place of sawdust I may incorporate with the pulp any other granular material which will separate the fibers of the pulp to form the necessary air-cells.
One orboth of the layers A C may be dispensed with, leaving the covering composed wholly of the pulp and sawdust. In place of wood-pulp, which I prefer to use on account of its cheapness, any pulpable fiber may be used.
It is evident that the tube here shown and claimed may be used for many other purposes besides steam-pipe cove1'ingas, for instance, for conduits for underground wires. I am aware that pipe-covering has been made of concentric layers of paper cemented together with fibrous and granular material; but I do not claim such structure.
My structure has the advantage over that disclaimed from the fact that it can be made more cheaply, being, as itis, in one piece and not built up of numerous pieces. It can be worked readily by cutting or sawing, as the other cannot without tearing it to pieces, and it is a better non-conductor, because the structure is more open, no part of it being solidly compressed, as on the layersof paper in the covering mentioned.
In Fig. 3 I have illustrated the manner in which I prefer to apply my covering to a steam or other pipe. E represents the pipe,
and D is a ring of metal interposed between the pipeand the covering at each end of the section.
I claim- The herein-described covering for steampipes and other like purposes, which consists of pulp or other fibrous material mixed with In testimony whereof I affix my signature in a granular material, as sawdust, and formed presence of two Witnesses. with a laminated structure, the laminations extending parallel With the surface, the fibers FRANK L. BARTLETT of adjacent laminae knitting together to unite WVitnesses: the mass, substantially as shown and cle- S. WV. BATES,
scribed. ARTHUR N. DENNIS.
US417768D Steam-pipe covering Expired - Lifetime US417768A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194536A (en) * 1976-12-09 1980-03-25 Eaton Corporation Composite tubing product
US4285369A (en) * 1978-02-03 1981-08-25 Parker-Hannifin Corporation Thermal insulation enhancement
DE102015107340A1 (en) 2014-05-13 2015-11-19 Donald J. Garden sen. Replaceable cap

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194536A (en) * 1976-12-09 1980-03-25 Eaton Corporation Composite tubing product
US4285369A (en) * 1978-02-03 1981-08-25 Parker-Hannifin Corporation Thermal insulation enhancement
DE102015107340A1 (en) 2014-05-13 2015-11-19 Donald J. Garden sen. Replaceable cap

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