US2043987A - Structural unit - Google Patents

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US2043987A
US2043987A US623731A US62373132A US2043987A US 2043987 A US2043987 A US 2043987A US 623731 A US623731 A US 623731A US 62373132 A US62373132 A US 62373132A US 2043987 A US2043987 A US 2043987A
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paper
openings
sheets
facing
sound
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US623731A
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George B Brown
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Johns Manville Corp
Johns Manville
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Johns Manville
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Priority to US623799A priority Critical patent/US2132642A/en
Priority to US623731A priority patent/US2043987A/en
Priority to US658937A priority patent/US2043988A/en
Priority to BE398436T priority
Priority to FR762525T priority
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B1/86Sound-absorbing elements slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B2001/742Use of special materials; Materials having special structures or shape
    • E04B2001/747Corrugated materials
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8414Sound-absorbing elements with non-planar face, e.g. curved, egg-crate shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8423Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8433Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
    • E04B2001/8438Slot shaped holes
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8423Tray or frame type panels or blocks, with or without acoustical filling
    • E04B2001/8452Tray or frame type panels or blocks, with or without acoustical filling with peripheral frame members
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8461Solid slabs or blocks layered
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8461Solid slabs or blocks layered
    • E04B2001/8471Solid slabs or blocks layered with non-planar interior transition surfaces between layers, e.g. faceted, corrugated
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection . Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8476Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8485Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
    • 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
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S138/00Pipes and tubular conduits
    • Y10S138/04Air conditioning
    • 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.]
    • Y10T428/24273Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24281Struck out portion type
    • 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.]
    • Y10T428/24273Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322Composite web or sheet
    • 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.]
    • Y10T428/24355Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • 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.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24661Forming, or cooperating to form cells
    • 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.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24669Aligned or parallel nonplanarities
    • Y10T428/24694Parallel corrugations
    • 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.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24669Aligned or parallel nonplanarities
    • Y10T428/24694Parallel corrugations
    • Y10T428/24711Plural corrugated components
    • 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.]
    • Y10T428/24628Nonplanar uniform thickness material
    • Y10T428/24669Aligned or parallel nonplanarities
    • Y10T428/24694Parallel corrugations
    • Y10T428/24711Plural corrugated components
    • Y10T428/24727Plural corrugated components with planar component

Description

Juney 16, l1936; 'Q B BROWN 2,043,987

STRUCTURAL UNIT Filed July 21, 1932 nmmwmnllllum lNvE R George Brown.

EMV l.

ATTORNEY Patented June 16, 1 936 STRUCTURAL UNIT George B. Brown, Somerville, N. J., assigner to Johns-Manville Corporation, New York, N. Y.,

a corporation of New York Application July 21, 1932, Serial No. 623,731

6Claims.

This invention relates to a sound absorbing unit and method of making the same. It Arelates lespecially to a composite of a plurality of sheets provided each with a multiplicity of closely spaced` openings of substantial size, adapted to admit incident sound, disposed rearwardly with respect to imperforate forward portions of the sheet and largely `concealed from view from a forward position.

The invention comprises a sound absorbing unit including abody member provided with sound absorbing spaces and an outer portion thereof, described herein, for convenience, as the facing element, of irregular surface having a multiplicity of openings extending at an angle, suitably at approximately a right angle, to the general plane of the facing element and adapted to admit incident sound to the sound absorbing spaces within the unit.

There is wide commercial use of acoustical structures consisting of sound absorbing pads provided with apertured facing elements, such .as woven fabric or closely perforated'metal sheeting. While such structures are very useful and advantageous, there is a field for a modified form of construction. In the type now in use, there ls some difficulty due to closing of the openings in the facing element, when the facing element is painted or otherwise decorated, if the openings are very small. On the other hand, if the openings are large, they may be conspicuous and create an architectural effect thatis not desired in certain installations. Furthermore, large openings may permit a small amount of dust from a iibrous backing material to fall downwardlythrough the openings, unless an additional fabric provided with small openings is installed between the perforated' metal and the fibrous backing ma- 40 terial. Also, there is' some expense involved in perforating sheet material in a manner adapted to admit incident sound satisfactorily.

It is an object of the present invention to overcome the disadvantages in apertured facing elements of the kinds that have been mentioned, and `to provide a novel-type of acoustical unit that is inexpensive to manufacture, effective in sound absorption, and light in weight. Other objects and advantages will appear as the description of the invention progresses.

An embodiment of the invention that is now preferred is illustrated in the drawing in which Fig. 1 shows a plan view of an acoustical unit provided with an improved outer sheet or facing element in which the openings adapted to admit incident sound are largely or wholly concealed from view from a forward position.

Fig. 2 shows a cross sectional view along the line 2 2 of Fig. 1.

Fig. 3 shows a plan view of a modification in 5 which the sheets have an irregular surface that resembles in appearance a basket weave with the cross or filler bands omitted. Fig. 4 shows a cross sectional view along the line 4 6 of Fig. 3, and Fig. 5, a similar view on 10 line 5 5.

In the various gures like reference characters denote like parts. Thus, i denotes a plurality of spaced sheets pro'- vided with irregularities of surface, including elel5 vations 2, depressions 3, and intermediate areas 4 between the elevated or forward and depressed or rearwardly disposed portions, indicated, respectively, by the reference characters 2 and 3, The said intermediate areas or portions of the 20 sheet, disposed rearwardly with respect to the forward portions, are provided with openings or apertures 5 (Fig. 2), of substantial size, adapted to admit incident sound. The various sheets of irregular surface are closely spaced and composited, in the assembled unit, and lie in planes that are generally parallel and define between them inner, sound absorbing spaces 6 that communicate with each other by means'of the openings 5. 'I'he openings 5 in the various sheets are non-registering, and thus cause sound which passes into the unit to undergo numerous changes of direction, in a labyrinth of intercommunicating spaces.

In the modication shown in Figs. 3 and 4, the openings 9 between `the elevated portions l and the lateral adjacent depressed portions 8 may be essentially cuts or slits of width extending approximately at aright angle to the general plane of the several sheets, to form a structure resembling a modified basket-weave. 'I'he said slits are sound-permeable, are adapted to admit incident sound, and lie in a plane that forms approximately a right angle with the general plane of the 45 ,facing element.

` The sheet material used in constructing the units of the types described may be a lire-resistant, felted product such as paper. The paper may comprise newsprint pulp, asbestos bers, or 50 the like. If the fibers composing the paper are combustible per se, they may be treated to make them fire-resistant. Thus, wood pulp may be made into paper with a suitablev proportion of a nre-retarding substance, such as a hydrated chemical, as, for example, alum or hydrated magnesium ammonium phosphate.

The inner sheets constituting the body of the acoustical unit and the outer sheet or facing element may have the same or diierent compositions. The facing 'element may be of more rigid composition, in order to assist in maintaining an established shape of exterior of the block.

A method of making a structural unit in accordance with the present invention, is illustrated in the following example.

A fire-resistant paper is first made by a conventional method. The finished and dried paper is passed between dies or rollers in order to pro- Ivide irregularities of surface of the paper. Rollers of a satisfactory type may be similar to those adapted to produce so-called indented paper,

which is now in wide use as a component of thermal insulating articles, for example. Such rollers or dies have elevated portions of approximately flat surface and depressed portions of similar shape of surface and may have connecting portions or intermediate areas that extend more or less at a right angle to the planes of the fiat surfaces of the elevated and depressed portions. The elevations on one roller mesh with the depressions on the other; the intermediate areas on one roller mesh also with those on the companion roller.

A departure is made from the usual process of making indent paper, in that provision is made for tearing or shearing the paper as it is indented, and, thereby, Providing openings in aproximately predetermined areas. The paper before indenting may be moistened, as by being subjected to a steaming operation just sufcient to leave the -paper somewhat brittle and not so readily deformable without tearing as would be the case if the paper were more thoroughly moistened. Also, the indenting rollers are set somewhat closer together than is the usual practice. Various settings may be used. I have used to advantage a setting so close that the clearance between the said intermediate areas of surface of the rollers, that is, between the side of a projection on one roller and the corresponding side of a depression in the companion roller, is slightly less thanthe thickness of the paper that is being indented, thereby causing a shearing action to form slits or openings.

When paper is passed between rollers set in this manner, there is a binding action on the paper in areas that are intermediate, that is, that occur between the raised and the depressed portions of surface, both of the rollers and also in the finished indented paper; the paper is torn in such areas to provide openings of substantial size, in approximately predetermined positions. Thus, these openings may be 115 to $4; inch in maximum length and width, aid closely spaced, say about half an inc h' apart or less. Being in areas that are transverse, that is, disposed at an angle that is suitably approximately a rightangle to the general plane of the sheet, and particularly to the plane connecting the high spots or forward portions of the sheet, as assembled in the unit, the holes also extend in one direction transversely, suitably at a right angle, to the plane of the forward portions.

After the paper issues from the indenting and tearing rollers, it is submitted to a coating and drying treatment, to maintain it in deformed and torn condition. Thus, it is coated with a proximately 1 pound per board foot. This block stiening chemical, as by being sprayed with a dilute, aqueous solution of sodium silicate or a dilute solution of bakelite and then passed through a steam heated drying chamber. 'Ihis produces a more or less stiff sheet, in which the sodium silicate or phenol-aldehyde resin (bakelite) serves to maintain the form in which the sheet is dried.

The thus stiifened sheet of stabilized irregularity of surface and tears'is then composite with similar sheets, the alternating sheets being laid, suitably, in opposite directions or crossed, in order to minimize the likelihood of internesting of the irregularities of adjacent sheets. Before the sheets are stacked together, they are coated with an adhesive such as a solution of sodium silicate or glue, to provide a layer of adhesive over the high spots of the several sheets. The sheets with the thus applied adhesive are then composited and are pressed lightly together to cause adherence. The nished composite is then dried and may be trimmed to size.

The product has interesting properties, some of which have been indicated already. The product is inexpensive, particularly in comparison with other sound absorbing units now on the market. The overall density is loW. Thus, a block of the type illustrated in Figs. l and 2,' fabricated from asbestos paper weighing 6 lbs. per hundred square feet of area (before being indented), with 16 plies of indented paper per inch of thickness, has an overall density of apis also of satisfactory sound absorbing properties;l it absorbs 77% of incident sound of a frequency of 512 cycles per second and 67% of frequency 1052 cycles. 'I'he voids de'ned between adjacent sheets in a composite of a plurality of indented sheets are limited on all sides at close intervals by the irregularities of the indented material; this limitation of the voids causes frequent reflection or change in direction of sound passing throughout the unit. Because of the positions of the openings unit, the openings may be largely concealed or invisible when viewed from a forward position butreadily visible when viewed in perspective. A unit provided with a facing element having such openings may be painted and repainted over the forward positions, by brush or otherwise.

in areas that may extend approximately at a right angle to the general plane of the face of the without adversely influencing the permeability of the facing element to incident sound. The openings persist and are not bridged over by the application of even a large number of coats of paint. Because the plane in which the openings lie is more or less vertical, when the structure is used in a ceiling, the objectionable falling of dust through the holes in such an installation is reduced to a minimum. The forward or raised portions of the facing element are preferably impermeable to sound, as illustrated. The facing member is suitably inelastic.

The term impermeable", as applied to penetrability to sound, refers to the condition of being not adapted to transmit sound to a substantial extent by air conduction. Thus, a continuous, unapertured sheet of metal would be considered impermeable to sound.

While the invention has been described particularly with reference to indented sheets, or basket-weave type of sheets, the invention is applicable to other structures. Such'a structure to which the invention is applicable is om comprising composited sheets ofcorrugated fire-resistant paper. Thus, asbestos paper may be slightly moistened with steam and passed between corrugating rollers provided with ridges on. one roller that mesh with corresponding troughs in the companion roller. 'Ihe rollers may be of such type and set so closely together that the clearance in areas in which it is desired to tear the paper is less than the thickness of the paper being corrugated. These areas may be those.

that are intermediate between the crests and the troughs in the corrugations, whereby the paper is torn in areas that are rearwardly disposed with respect to the forward portions of the corrugated sheeting. Corrugated sheets made as described may be composited with each other, in cross-wise relationship, or with alternating sheets of paper indented and torn as described above. Since the positions of tearing of the paper during corrugation are irregularly spaced, it is obvious that openings corresponding to the tears will bein non-registering relationship in the sev veral composited sheets.

in the apertured areas in the'facing element be-` ing closely spaced, wherebythey are adapted to v admit incident sound.

2. A structural unit comprising in combination a composite of a plurality of spaced sheets provided each with a multiplicity of openings, a facing element of irregular surface, and-aperturedl areas in the facing element extending trans versely to the general plane thereof, the said openings being in non-registering relationship in the several sheets.

3. A structural `unit comprising in combination a composite of a plurality of spaced sheets of asbestos paper provided each with a multiplicity of non-registering openings, an asbestos paper facing element of irregular surface, apertured areas in the facing element extending approximately transversely to the general plane thereof, and a stiifening material coated over the said sheets and facing element with preservation of -k the permeability thereof to sound. A

li. A structural unit comprising in combination a composite of a plurality of spaced sheets provided each with a multiplicity of openings, a fac,-

ing element of irregular surface, and apertured areas in the facing element extendingtransversely to the general plane thereof.

5. Sound absorbing means comprising a body portion, including composited spaced sheets provided with perforations adapted to admit incident sound and a facing element adheredto the said bodyportion, the said facing element includ'- ing laterally adjacent elevated and depressed portions and provided with sound-permeable slits be` tween ythe said laterally adjacent elevated and depressed portions, the said slits' lying in a plane that forms approximately a right angle with the general plane of the facing element.

6. A` preformed sound absorbing unit comprisl ing a plurality of composited indented sheets, alternating elevated and depressed portions thereof constituting irregularities of surface and defining, between adjacent sheets, voids limited on all sides and at lclose intervals by the said irregularities, and intermediate areasn extending between the elevated and depressed portions and transversely with respect to the general plane of the elevated portions, the said intermediate areas being provided with openings adapted to admit incident sound.

i GEORGE B. BROWN.

US623731A 1932-07-21 1932-07-21 Structural unit Expired - Lifetime US2043987A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US623799A US2132642A (en) 1932-07-21 1932-07-21 Sound absorbing unit
US623731A US2043987A (en) 1932-07-21 1932-07-21 Structural unit
US658937A US2043988A (en) 1932-07-21 1933-02-28 Lightweight unit
BE398436T 1933-08-02
FR762525T 1933-08-31

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US623799A US2132642A (en) 1932-07-21 1932-07-21 Sound absorbing unit
US623731A US2043987A (en) 1932-07-21 1932-07-21 Structural unit
US658937A US2043988A (en) 1932-07-21 1933-02-28 Lightweight unit
BE398436D BE398436A (en) 1932-07-21 1933-08-02
FR762525D FR762525A (en) 1932-07-21 1933-08-31 Improvements to the energy absorbing elements of sound and their method of manufacture

Publications (1)

Publication Number Publication Date
US2043987A true US2043987A (en) 1936-06-16

Family

ID=24499200

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Application Number Title Priority Date Filing Date
US623799A Expired - Lifetime US2132642A (en) 1932-07-21 1932-07-21 Sound absorbing unit
US623731A Expired - Lifetime US2043987A (en) 1932-07-21 1932-07-21 Structural unit
US658937A Expired - Lifetime US2043988A (en) 1932-07-21 1933-02-28 Lightweight unit

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US623799A Expired - Lifetime US2132642A (en) 1932-07-21 1932-07-21 Sound absorbing unit

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US658937A Expired - Lifetime US2043988A (en) 1932-07-21 1933-02-28 Lightweight unit

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US (3) US2132642A (en)
BE (1) BE398436A (en)
FR (1) FR762525A (en)

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US3362867A (en) * 1964-07-06 1968-01-09 Midland Ross Corp Lading pallet of laminated construction
US5858509A (en) * 1996-11-15 1999-01-12 Digital Equipment Corporation Attenuating vibrations in a mounting shelf for multiple disk drives
US5926366A (en) * 1996-11-15 1999-07-20 Digital Equipment Corporation Tab and slot disk drive vibration reduction structure
US20110209424A1 (en) * 2010-02-26 2011-09-01 Henkel Corporation Self adhering window flashing tape with multi-directional drainage plane
US8563114B2 (en) * 2009-12-11 2013-10-22 Astenjohnson, Inc. Industrial fabric comprised of selectively slit and embossed film
US20140099464A1 (en) * 2012-10-04 2014-04-10 ST Global Partners, LLC Peel and stick decoupling membrane
US20150167215A1 (en) * 2012-06-07 2015-06-18 Astenjohnson, Inc. Compression resistant, selectively slit and embossed films and industrial textiles made thereof
USD810324S1 (en) * 2015-10-07 2018-02-13 Groupe Isolofoam Inc. Insulation panel
USD830584S1 (en) * 2015-11-04 2018-10-09 Joe Comitale Flooring membrane

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US2758047A (en) * 1953-09-17 1956-08-07 Dowd Alfred Flexible corrugated wrapping sheet
US2826261A (en) * 1956-08-30 1958-03-11 Oliver C Eckel Acoustical control apparatus
US3168432A (en) * 1961-12-22 1965-02-02 Thore M Elfving Core material
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US3380206A (en) * 1965-09-29 1968-04-30 Soundlock Corp Lay-in acoustical ceiling panel with flexible diaphragms
US3507634A (en) * 1965-10-22 1970-04-21 United Aircraft Corp Composite metal structure
US3483944A (en) * 1966-09-09 1969-12-16 John W Handy Jr Acoustic structure
US3466019A (en) * 1967-08-04 1969-09-09 Ronald Priestley Gas-liquid contact packing sheets
US3661721A (en) * 1971-02-05 1972-05-09 Pactide Corp Compact multistage distillation apparatus having stacked microporous membranes and impermeable films
US4232093A (en) * 1973-10-29 1980-11-04 Summa Corporation High temperature skin construction
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US4838524A (en) * 1987-09-08 1989-06-13 Cyclops Corporation Noise barrier
US5157893A (en) * 1988-04-15 1992-10-27 Midwest Research Institute Compact vacuum insulation
US5057176A (en) * 1988-05-10 1991-10-15 Manville Corporation Method of forming corrugated paperboard automotive liner
US4886696A (en) * 1988-05-10 1989-12-12 Manville Corporation Corrugated paperboard automotive liner
US5394786A (en) * 1990-06-19 1995-03-07 Suppression Systems Engineering Corp. Acoustic/shock wave attenuating assembly
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US5325893A (en) * 1991-10-04 1994-07-05 Tokushu Paper Mfg. Co., Ltd. Air duct and paper therefor
US5212355A (en) * 1991-10-18 1993-05-18 Hollanding Inc. Sound absorptive file cabinet door
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US7207310B2 (en) * 2005-07-01 2007-04-24 Visteon Global Technologies, Inc. Noise attenuation device for an air induction system
FR2889616B1 (en) * 2005-08-02 2008-05-30 Hutchinson Sa Acoustic panel of type a blade of air
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US20110100747A1 (en) * 2006-05-24 2011-05-05 Airbus Operations Gmbh Sandwich element for the sound-absorbing inner cladding of means of transport, especially for the sound-absorbing inner cladding of aircraft
US8100225B2 (en) * 2006-09-13 2012-01-24 Nucore Technologies Inc. Room dampening panel
US8251175B1 (en) 2011-04-04 2012-08-28 Usg Interiors, Llc Corrugated acoustical panel
US8511429B1 (en) * 2012-02-13 2013-08-20 Usg Interiors, Llc Ceiling panels made from corrugated cardboard
US9212485B2 (en) * 2012-07-13 2015-12-15 Victor Wolynski Modular building panel
DE102014202477A1 (en) * 2014-02-11 2015-08-13 Leena Rose Wilson Acoustic absorber and use of such an acoustic absorber
FR3018384B1 (en) * 2014-03-04 2016-03-11 Jean-Marc Scherrer Acoustic absorption assembly with high and low frequencies
US10354638B2 (en) 2016-03-01 2019-07-16 Guardian Glass, LLC Acoustic wall assembly having active noise-disruptive properties, and/or method of making and/or using the same
US10134379B2 (en) * 2016-03-01 2018-11-20 Guardian Glass, LLC Acoustic wall assembly having double-wall configuration and passive noise-disruptive properties, and/or method of making and/or using the same
US10373626B2 (en) 2017-03-15 2019-08-06 Guardian Glass, LLC Speech privacy system and/or associated method
US10304473B2 (en) 2017-03-15 2019-05-28 Guardian Glass, LLC Speech privacy system and/or associated method
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3362867A (en) * 1964-07-06 1968-01-09 Midland Ross Corp Lading pallet of laminated construction
US5858509A (en) * 1996-11-15 1999-01-12 Digital Equipment Corporation Attenuating vibrations in a mounting shelf for multiple disk drives
US5926366A (en) * 1996-11-15 1999-07-20 Digital Equipment Corporation Tab and slot disk drive vibration reduction structure
US8563114B2 (en) * 2009-12-11 2013-10-22 Astenjohnson, Inc. Industrial fabric comprised of selectively slit and embossed film
US20110209424A1 (en) * 2010-02-26 2011-09-01 Henkel Corporation Self adhering window flashing tape with multi-directional drainage plane
US8490338B2 (en) * 2010-02-26 2013-07-23 Henkel Corporation Self adhering window flashing tape with multi-directional drainage plane
US9816215B2 (en) * 2012-06-07 2017-11-14 Astenjohnson, Inc. Compression resistant, selectively slit and embossed films and industrial textiles made thereof
US20150167215A1 (en) * 2012-06-07 2015-06-18 Astenjohnson, Inc. Compression resistant, selectively slit and embossed films and industrial textiles made thereof
US9194119B2 (en) * 2012-10-04 2015-11-24 ST Global Partners, LLC Peel and stick decoupling membrane
US20140099464A1 (en) * 2012-10-04 2014-04-10 ST Global Partners, LLC Peel and stick decoupling membrane
US9920537B2 (en) * 2012-10-04 2018-03-20 ST Global Partners, LLC Peel and stick decoupling membrane
US10753106B2 (en) 2012-10-04 2020-08-25 Schluter Systems L.P. Peel and stick decoupling membrane
USD810324S1 (en) * 2015-10-07 2018-02-13 Groupe Isolofoam Inc. Insulation panel
USD830584S1 (en) * 2015-11-04 2018-10-09 Joe Comitale Flooring membrane

Also Published As

Publication number Publication date
BE398436A (en) 1933-09-30
FR762525A (en) 1934-04-11
US2132642A (en) 1938-10-11
US2043988A (en) 1936-06-16

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