US1913180A - Insulating covering - Google Patents

Description

June 6, 1933. L. WEBER INSULATING COVERING Filed March 29, 1929 EH15? webs Patented June 6, 1933 V y a 1 *UNITED STATES PATENT OFFICE a LOUIS WEBER, or E'As'r crrrcneo, rnnninn i I INSULATING covnnme t Application filed. March 29 1929. Serial No. 350,96

The present invention relates to improveadapted to withstandtemperatures as high ments in heat insulating coverings, and has as 2000? F; without breaking down, and in particular reference to high temperature inthe present instance is made of a paste of sulating material adapted to be used as a mineral slag wool which has been driedat a 5 covering for pipes. 7 high temperature: to form a solid matrix The primary objects of the present inventhatrwillnot'shrink when againsubjected to tion are to provide anew and improved inhlgh temperatures in use. The wall of the sulating material which will withstand high core, 10" maybe made of any suitable thicktemperatures, and which is efiicient, light, inness but preferably is made approximately 0 expensive, and easy to make and to apply. /gmch.m thickness. i r i A more specific object resides in the pro- The outenlayer 11 is made of a suitable vision of a novel insulating covering, particheat lnsulatmg material, such as asbestos l l d t d f i hi h comprises a impregnated with a stifiening substance. In. relatively thin inner core of high temperatheipresentinstance, the layer 11 consists of 15 ture insulating material, and an outer relaa p urahty of alternating corrugated and tively thick ring or layer of low temperature plain substantially cylindrical plies 12 and i l ti t i l, 7 I 13 of asbestos paper superimposed upon Still th bj t i t id a v l each other and about the core 10 to form an covering of the above character whi h will outer annular air cell structure. Prefer- 20 not shrink appreciably when subjected to y, he 131168 3 13 r t r and hi h temperatures i brought into superimposed relation by roll- Further objects and advantages will bemg t-Wo strips of material tog 9 Q comev apparent as th d i ti proceeds, wh ch is corrugated and the other of which is I th accompanying d i Fi 1 i plaln. It wlll be understood, however, that 25 a, perspective, iew of a, portion of a, coverany suitable 21.1I' COIISlIlUCtlOIl 1113,3 be eming embodying thefeatures of my invention. p The P e 2 and 13 a held 9- Fig. 2 is a fragmentary longitudinal sece y the etlttenlng ellbstflnee, m 111 tional view of the covering taken along line k g the ye 11, the latter filmed 2 .2 fFi 1 a high temperature to take out shrlnkage.

While the invention is susceptible of varih layer 11 y be lnede of y deemed ous modifications and alternative constructhlckness, e p one and one'helt fions, I h Shown i th d i d 111 lnches. Thetlnckness of the'core 1O preferherein describe in detail the preferred eml y 1S I'etemed eleptexlmetely e Sit-meter bodiment, but it is to be understood that I ttlttetent Outer layers 11 of Vetymg thlek' do not thereby intend to limit the invention neeeesl to the specific form disclosed, but intend to P y, h P X of the layer 11 Cover ll difi ti d lt r ti is incorporated in the matrlx of the core 10. structions falling within the spirit and scope The layer 11 yb bllltt about the core 1 f th i ti asiexpressed i th appended before the latter 1s dried to form the SOllCl l i e core 10. The core 10 and the layer 11 may Referring more specifically tothe drawing, be led tegethet the exemplary embodiment of the invention Preferably e C(Wermg 1e l t m comprises a generallycylindrical body havas along 11116 S0 facllltate 1 ing an inner core 10 of high temperature inp ymg the verlng o a pipe (not shown). sulating material, and an outer layer 11 of To hold thesections otthe coverlng together relatively low temperature insulatingmateabout the p1pes, a sheet of suitable'material rial. 15, such as canvas duck, is lapped about the The core 10, which is adapted to be placed dy Sections 5 p directly against the heated surface to be in It will be evldent that I have provided sulated, preferably is made of a dried paste a light, lnexpenslve, efficient andshrmkless 1190 insulating covering adapted to Withstand high temperatures. Air cell asbestos coverings and other low temperature insulating coverings are not adapted to safely Withstand high temperatures, for example above 400 F., but are very desirable in that they are light and inexpensive. High temperature insulating material on the other hand is expensive and heavy, and when thick is liable to crack. By providing an insulating covering having a high temperature insulating core inside of a relatively low temperature insulating layer the advantages of the loW temperature insulation are retained in a high temperature insulating covering. The core serves to keep the temperature at the inside of the low temperature layer down to a point Where injury to the latter is prevented.

I claim as my invention:

A. cylindrical insulating covering comprising, an inner cylindrical core of a dried paste of mineral slag W001 and adapted to Withstand high temperatures up to approximately 2000 F., and an outer dead air cell layer of low temperature insulating material.

In testimony whereof, I have hereunto aflixed my signature.

LOUIS WEBER.

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