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Publication numberUS2844998 A
Publication typeGrant
Publication dateJul 29, 1958
Filing dateOct 21, 1954
Priority dateOct 21, 1954
Publication numberUS 2844998 A, US 2844998A, US-A-2844998, US2844998 A, US2844998A
InventorsVincent Harvard B
Original AssigneeOwens Illinois Glass Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Glass building block having lightdirecting properties
US 2844998 A
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Description  (OCR text may contain errors)

H. B. VINCENT 2,844,998

July 29, 195s GLASS BUILDING BLOCK HAVING LIGHT-DIRECTING PROPERTIES mea mit. 21, 1954 INVENTOR` Hnlwaxn B VINCENT GLASS BUILDING BLOCK HAVING LIGHT- DIRECTING PROPERTIES Harvard B. Vincent, Toledo, Ohio, assigner to Owens- Illinois Glass Company, a corporation of Ohio Application October 21, 1954, Serial No. 463,729

1 Claim. (Cl. 88-60) This invention relates to improvements in transparent blocks of the type which have become increasingly popular in recent years for incorporation in the walls of buildings. More particularly, this invention relates to a hollow-glass block, of the type in which the internal faces of nited States Patent O ice f so as to effect a redirecting of light rays received directly the hollow block embody horizontal prismatic flutings for 2O deflecting incident sunlight in such manner as to cause a major part of the light to be directed throught the block and then upwardly toward the ceiling of the room where the block constitutes the outer wall.

lt is a characteristic of these so-called light-directing glass blocks that a minor portion of the light passing through fails to follow the desired direction, but is transmitted into the room in a horizontal or downwardly di- ,rected path, which is quite undesirable from the standpoint of producing glare in the eyes of the room occupants. Additionally, during the hot summer season, an s appreciable radiation of heat in the direction of the room occupants has been produced by the glass block wall constructions heretofore utilized.

lt is an object of this invention to provide an improved transparent block for buildings, or the like, wherein the interior or room-adjacent surface of the block is fabricated in such manner as to substantially eliminate the transmission of any stray light in a direction tending to produce glare in the eyes of the room occupants without substantially reducing the overall light transmission through the block.

A further object of this invention is to provide an improved light-directing type of glass block for buildings, or the like, wherein the overall heat emissivity of a wall formed of such block is substantially reduced, and, additionally, the direction of heat radiation produced by such wall is substantially entirely toward the ceiling of the room, thus increasing the comfort of the room occupants.

The specific nature of this invention, as well as other objects yand advantages thereof, will become apparent to those skilled in the art from the following detailed description, taken in conjunction with the annexed sheets of drawings on which, by way of preferred example only, are illustrated two embodiments of this invention.

On the drawings:

Figure l is a vertical sectional view taken through a wall of a room constructed with transparent block embodying this invention.

Figure 2 is a view similar to lfigure l illustrating a modiied construction of light-directing block embodying this invention.

As shown on the drawings:

Numeral 10 indicates a transparent external wall of a room having a light-reflecting ceiling l1. Wall 10 is "formed by assembly of a plurality of individual glass block units 12 in conventional fashion, such as by joining such block units by interspersed layers of mortar 13.

Each block unit 12 has an outer face 12a, a pair of opposed internal faces 12b and 12C, and an inner or roomadjacent face 12d. While the outer face 12a is illustrated as being of planar configuration, it may conceivably be from the sun, indicated by the lines 14, so that such light will be directed to the ceiling 11 of the room, thus illuminating the interior of the room solely by reflected light and protecting the occupant from the direct glare of the sun.

It often happens that ground reflected or other stray light, indicated by the ray 15,` enters the transparent blocks 12 at such angle so that, despite the bending action of the internal prismatic surfaces 12e and 121i, the light tends to enter the room along a horizontal or downwardly directed path, so as to produce a glare effect on the eyes of the occupant.

In accordance with this invention, all such horizontal or downwardly directed stray light may be effectively eliminated by providing the entire room-facing surface of the interior or room-adjacent wall 12d of the transparent block with a series of vertically adjacent horizontally extending prismatic elements 12g. Each prism 12g thus denes an upwardly directed surface 12h and a downy wardly directed surface 12j. In accordance with this invention, each of the downwardly directed surfaces 12j is provided with an apaque coating i6 which substantially prevents the transmission of any light from such downwardly directed surfaces. Thus the stray light beam represented by the ray 15 cannot directly enter the room along either a horizontally or a downwardly directed path, but is reected or absorbed back through the walls of the block so that it finally enters the room, if at all, along an upwardly directed path, passing out through one of the upwardly directed surfaces 12h of the interior wall 12d.

As a further feature of this invention, the apaque coating 16 applied to such downwardly facing surfaces 12j is preferably formed of an unoxidized metal. For example, aluminum, silver, copper or other polished metals would provide a suitable coating. Such coating is not only opaque, but has a heat emissivity factor substantially lower than that of glass. Accordingly, the total heat radiated into the room by the downwardly facing surfaces 121 will be substantially reduced, and since most of the heat radiation felt by the occupants of the room emanates from such downwardly facing surfaces, ,it is clear that the comfort of the occupant, so far as heat radiation is concerned, will be substantially improved.

It will, of course, be apparent to those skilled in the art that any form of prismatic surfaces may be employed on the interior side ofthe glass block, so long as the downwardly facing portion of such surfaces are provided with the apaque coating. Thus, in Figure 2 there is illustrated a modification of this invention, wherein the configuration of the prismatic surfaces on the interior wall of the block is represented by generally arcuate utings, including upwardly facing portions 12k and downwardly facing portions 12m, to which the opaque coating 16 is again applied.

It will, of course, be understood that various details of construction or procedure may be modified through a wide range without departing from the principles of this invention, and it is, therefore, not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appended claim.

l claim:

A hollow glass building block comprising an outer face having an external surface adapted for exposure to a light source and an inner face interconnected to said outer face about the periphery of the block, said outer face and said inner face having opposed internal surfaces in spaced relationship on which are respectively formed a multiplicity of cooperating light-directing prisms, said inner face additionally having an' external room-facing surface similarly formed with light-directing prisms, said room-facing prisms providing alternate upwardly and downwardly facing surfaces adapted to cooperate with the prisms formed on the internal surfaces of both said faces to redirect substantially all of the incident light received upon the exterior surface of said outer face upwardly and outwardly from said inner face, a layer of opaque material covering said downwardly facing surface portions of said room-facing prisms to prevent outwardly and downwardly directed stray light transmission, said o paque material having a heat emssivity factor'"'substan tially lower than the heat emissivity factor of said glass block to diminish outwardly and downwardly directed solar heat radiation.

References Cited in the tle of this patent UNITED ST ATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US721259 *Nov 12, 1898Feb 24, 1903Pressed Prism Plate Glass CompanyIlluminating structure.
US755197 *Apr 30, 1902Mar 22, 1904Pressed Prism Plate Glass CompanyIlluminating structure.
US2179862 *Aug 25, 1933Nov 14, 1939Holophane Co IncReflecting brick and walls and buildings utilizing the same
US2179863 *Aug 25, 1933Nov 14, 1939Holophane Co IncLight directing brick and walls and buildings utilizing the same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3096684 *Nov 12, 1958Jul 9, 1963Owens Illinois Glass CoFenestraction structure for control of daylighting
US3113728 *Jun 24, 1960Dec 10, 1963Owens Illinois Glass CoArtificial light and daylighting structure
US3243117 *Aug 12, 1964Mar 29, 1966Limited Westminster BankBuilding structures
US3809141 *Jan 26, 1972May 7, 1974Loerop JVentilator and simulated structure panel
US3904866 *Oct 29, 1974Sep 9, 1975Dorothy E HayesTranslucent structural panels
US3954326 *Feb 25, 1974May 4, 1976Michaelis Maximilian Gustav AlTranslucent building blocks
US4326012 *Sep 18, 1980Apr 20, 1982Charlton Walter TSolar power building block
US4914877 *Nov 15, 1988Apr 10, 1990Bennett-Ringrose-Wolfsfeld-Jarvis-Gardner, Inc.Translucent glass curtain wall
US5117478 *Feb 19, 1991May 26, 1992Minnesota Mining And Manufacturing CompanyDevice for redirecting light through a hollow tubular light conduit
US6356391Oct 8, 1999Mar 12, 20023M Innovative Properties CompanyOptical film with variable angle prisms
US6447135Oct 8, 1999Sep 10, 20023M Innovative Properties CompanyLightguide having a directly secured reflector and method of making the same
US6560026Jan 16, 2002May 6, 2003Mark E. GardinerOptical film with variable angle prisms
US6707611Jan 29, 2003Mar 16, 20043M Innovative Properties CompanyOptical film with variable angle prisms
US6845212Oct 8, 1999Jan 18, 20053M Innovative Properties CompanyOptical element having programmed optical structures
US7046905Jul 11, 2000May 16, 20063M Innovative Properties CompanyBlacklight with structured surfaces
US7221847Aug 3, 2004May 22, 20073M Innovative Properties CompanyOptical elements having programmed optical structures
US7873256Sep 14, 2005Jan 18, 20113M Innovative Properties CompanyBacklight with structured surfaces
US7992361 *Apr 13, 2006Aug 9, 2011Sabic Innovative Plastics Ip B.V.Polymer panels and methods of making the same
US8588574Oct 30, 2007Nov 19, 20133M Innovative Properties CompanyBacklight with structured surfaces
US8590271Dec 5, 2006Nov 26, 2013Sabic Innovative Plastics Ip B.V.Multi-wall structural components having enhanced radiatransmission capability
US20110232215 *Mar 22, 2011Sep 29, 2011Politec Polimeri Tecnici S.A.Skylight to integrated in a covering structure made of insulated sheets and production method thereof
EP0560107A1 *Feb 22, 1993Sep 15, 1993Gerhard FeustleDevice for concentrating or deflecting light
Classifications
U.S. Classification359/593, 359/594, 52/437, 52/306
International ClassificationF21S11/00, F21V5/00, F21V5/08, E04C1/00, E04C1/42
Cooperative ClassificationF21S11/00, F21V5/08, E04C1/42
European ClassificationE04C1/42, F21V5/08, F21S11/00