US1984653A

US1984653A - Insulating means

Info

Publication number: US1984653A
Application number: US693690A
Authority: US
Inventors: Donald R Palmer; Frank M Sayford
Original assignee: FRANK M SAYFORD CO Inc
Current assignee: FRANK M SAYFORD Co Inc
Priority date: 1933-10-14
Filing date: 1933-10-14
Publication date: 1934-12-18
Anticipated expiration: 1951-12-18

Description

1934; D. R. PALMER El AL 1,934,653

INSULATING MEANS Filed Oct. 14, 1933 INVENTORS DJRPaZmer ErF/KJa hrd BY I WW I THEIR ATTO EYS Patented Dec. 18, 1934 UNITED STATES PATENT OFFICEE INSULATING MEANS vania Application October 14, 1933, Serial No. 693,690

7 Claims.

This invention relates to means for use as an insulation with any devices or apparatus for which it maybe adapted, such as refrigerating apparatus or boxes and within walls or partitions of rooms or in the casings or housings of vehicles such as railway coaches or freight cars.

The object of this invention is to produce a light, easily manufactured block or insulating member which has a minimum of conductivity of heat from its outer surface inward or vice versa. I

The form of our present insulating means preferably consists of a series of superposed sheets of fibrous material, consisting of a plurality of flat sheets between which are a plurality of sheets that have been stamped or pressed into the desired form. The superposed sheets are preferably attached together by the application of any suitable adhesive, such as cement, paste or glue, to constitute blocks or slabs of material of any desired thickness, so that they will easily fit and be contained within the space to which the insulating means is applied.

The fibrous material used for our improved insulating means is preferably in comparatively thin sheet form, and the deformed sheets are preferably embossed or deformed by suitable rolls having the desired shape of the irregularities engraved or cut therein so as to constitute interfitting dies or die members.

For a detailed description of one form of our present invention, reference may be had to the specification and to the accompanying drawing forming a part thereof, in which Fig. 1 is a plan view of a sheet of fibrous material having the desired deformation impressed therein;

Fig. 2 is a transverse sectional view of a block including sheets of material illustrated in Fig. 1 and taken substantially on the line 2-2 of that figure;

Fig. 3 is a sectional view of a block formed of the sheets illustrated in Fig. 1, but taken substantially on the line 3-3 thereof;

Fig. 4 is a diagonal sectional view of a block of insulating material taken substantially on the line 4.-4; of Fig. 1.-

Referring to the drawing, particularly to Figs. 2, 3 and 4, the numeral 1 indicates a sheet of fibrous material which has been die-formed or treated with dies or rolls to assume the shapes indicated in section in Figs. 2, 3, and 4, said configurations being forcedsufliciently out from the plane of the sheets as indicated in Fig. 2. When built up into final form to constitute a block or slab of insulating material, the plain sheets are preferably separated by the embossed or deformed sheets of fibrous material, as indicated by the letters H and L in Fig. 2 of the drawing.

As above mentioned, the sheets having the oppositely extending embossed projections thereon are attached to the plain sheets by any preferred composition of cement, paste or glue, but for this purpose we have-used a solution of sodium silicate. This is applied preferably only at a few points on the contacting surfaces be-' tween the plain sheets and the distorted or embossed sheets so that they are attached together to form a complete block or slab of the desired thickness. The number of sheets of plain and of embossed sheet material that is used per inch of thickness may be of any number that is considered preferable, but we have found that from 8 to 15 sheets of each material per inch give extremely good results. The form of the embossed sheets which we have illustrated in the present application comprises, as an example, the following features:

Referring to the cross-section of the material as illustrated in Figs. 2 and 4, it will be noted that'the sections are taken through a plurality of substantially octagonal depressions and raised portions. In other words, those marked -H are high portions and those marked L are low portions. As will be obvious from the various figures of the drawing, these high and low portions are pressed respectively upward and downward from the central plane of the sheet of fibrous material. The surfaces, however, of the high and low protuberances do not have plain exterior surfaces, but are slightly recessed as indicated at 3 to form marginal edges or rounded rims or fillets as indicated at 4. These rounded edges or fillets constitute the portions which contact with the adjacent plain sheets 2, and reduce the heat conductivity of I the material at such points or lines to a minimum.

In order to still further reduce the conductivity of the material or paper, it is desirable to produce in portions thereof small openings, ruptures or discontinuous parts, as indicated by the somewhat rough lines 5, in Fig. 1. These ruptures may be produced in any suitable way, such as during the pressing or embossing of the deformed sheets, which sheets are pressed or indented beyond the normal expansive properties of the material. In the present instance, the

ruptures in the material are produced as indibeing discontinuous portions of the formed sheet material. This feature greatly aids the nonconductive character of the material, since the discontinuous or slightly separated portions of the projections and indentations interrupt the continuity of the material and therefore decrease the conductivity thereof.

Fig. 4 being a sectional view taken on a diagonal, such as the line 4-4 of Fig. 1, indicates how the parts appear if the block is cut on such a diagonal line. Obviously in this figure the ruptured or open portions of the projections and indentations do not appear, and the portions of the sheet indicated by the numeral 6 are the only portions of the sheet which remain in the original plane of the paper or other sheet material.

Having thusdescribed this embodiment of our invention, we do not wish to be understood as being limited to the precise details of form and arrangement of parts described herein, except as may be consistent with the scope and tenor of the appended claims, for various changes may be made by those skilled in the art without departing from the substance of this invention as stated in said claims.

What we claim and desire to protect by Letters Patent is:

said protuberances having recessed outer sur-" faces forming marginal rims around said protuberances, for reducing the area of contact with adjacent sheets.

2. Insulating means composed of sheetmaterial in the form of a block or slab, a plurality of the sheets of which are plain, and spacing sheets deformed'to constitute protuberances extending in opposite directions with respect to the normal plane of said sheets, said protuberances having recessed outersurfaces forming marginal rims or beads around said protuberances for reducing the area of contact with the adjacent sheets of said material.

3. Insulating means composed of sheet material, a plurality of the sheets of which have protuberances extending in opposite directions from deformed material comprising embossed pro-v tuberances extending in opposite directions from the normal plane of said sheet, said protuberances having their outer surfaces depressed to form continuous marginal contacting ribs or beads around the edges thereof.

5. As an article of manufacture, a sheet of deformed material comprising embossed protuberances extending in opposite directions from the normal plane of said sheet, said protuberances having their outer surfaces depressed to form ribs in the normal plane of adjacent sheets of plain material, said ribs contacting therewith to reduce the conductive area.

6. As an article of vmanufacture, a sheet of deformed material comprising embossed protuberances extending in opposite directions from the normal plane of said sheet, certain opposite sides of said protuberances being connected together by plain portions lying in the normal plane of said sheet, a plurality of sides of said protuberances having small openings or ruptures to form discontinuous portions of the ma- :1

terial to reduce conductivity.

7. As an article of manufacture, a sheet of deformed material which has protuberances extending in opposite directions from the normal plane of said sheet, the protuberances thereof that are alined along transverse and longitudinal lines of said sheet being staggered relatively in successive transverse lines on respective surfaces of said sheet and said protuberances being reversely recessed to form marginal ribs or beads to reduce their contact areas.

DONALD R. PALMER. FRANK M. SAYFORD.