US2842073A - Skylight - Google Patents

Description

July 8, 1958 S. K. HUsToN ET AL 2,842,073

SKYLIGHT Filed sept. 29, 1954 mi Wm f@ l E Z533 fraz/enfans.'

' 27 'jaydfl/HZLSZLOR and 3g Toml-Q/*aierm United States Patent() SKYLIGHT Sanford K. Huston and Thomas L. Anderton, Chicago, lll. Application September 29, 1954, Serial No. 459,015

Claims. (Cl. 10S-16) The invention relates generally to skylight structures and more particularly to a skylight structure which is especially adapted for use with plastic skylight domes and the like.

In the past, considerable difliculty has been experienced in skylight structures utilizing dome elements constructed of plastic as distinguished from the older type glass skylights commonly in use. One of the problems encountered in skylight structures of this type is that plastic is oftentimes subject to cracking, particularly where stresses may be concentrated or localized at particular points on the plastic structure, as for example, where fastening means extends through openings in the plastic. Another common fault with plastic skylights results from the lack of adequate provision for the discharge of accumulated moisture from the inside of the skylight structure, whereby freezing occurs in cold weather, resulting in the application ofoutward forces to the plastic dome, forcing the same oil its base structure.

The present invention has among its `objects the production of a skylight construction which may utilize a plastic dome structure, eliminating the disadvantages above referred to and at the same time provide a relatively simple and durable structure.

Another object of the invention is the production of such a skylight construction which provides adequate means for carrying off condensate, etc., even in freezing `weather and in which such condensate accumulates at points remote from the plastic dome structure, thereby eliminating any possibility of applying` forces thereto, the construction being such that the plastic dome is so mounted that adequate provision for expansion and construction of the dome is also permitted.

A further object of the invention is the production of such a skylight .construction which is provided with novel means for achieving a substantially water-tight connection between the skylight structure and the supporting structure on which it is to be mounted, as for example, on a roof, whereby maximum protection is achieved from the rooting ashing at the skylight opening irrespective of any minor irregularities which may occur in the rooting surfaces adjacent such opening.

A further object of the invention is the production of such a skylight construction having the above advantages, which at the same time may be readily fabricated and installed with a minimum of time and expense, and in which the method of installation involves novel but simple procedures which may be readily utilized from the skylight exterior.

A further object of the invention is the production of a skylight construction having the above advantages which may employ a skylight dome comprising a plurality of individual sections.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end our invention consists in the novelconstruction, arrangement and combination of parts herein ice shown and described, and more particularly pointed out in the claims.

Inthe drawings, wherein like reference characters indicate like or corresponding parts:

Fig. 1 is a top plan View of a skylight embodying the present invention;

Fig. 2 is a sectional view taken approximately on the line 2-2 of Fig. l;

Fig. 3 is a sectional view taken approximately on the line 3-3 of Fig. 2; and

Fig. 4 is a sectional view taken approximately on the line 4-4 of Fig. 3.

While the present invention may be employed with skylight domes constructed from a single piece of plastic `or other material, the invention is also of particular application to plastic and similar domes which are of such size that the utilization of a plurality of individual sections to form the dome is desirable, and for illustrative purposes the invention is shown in the drawings in connection with a multi-section dome structure.

Referring to the drawings, the reference numeral 1 indicates generally a skylight structure mounted on a skylight opening 2 in a' roof or other surface 3. To provide supporting means for the skylight structure the skylight opening 2 is normally defined by an upwardly or outwardly extending annular wall or curb 4, with the skylight structure mounted on the top edge 5 of the curb 4. It is common practice during application of the roofing material to the supporting surface 3 to provide a flashing 6 at the outer faces of the curb 4, the rooting paper being brought up ilush with the top edge 5 of the curb and ta'rred or otherwise processed in the usual manner. oftentimes, the tlashing 6 will .comprise a plurality of thicknesses of material and in finishing the corners of the curbing the rooting material is usually brought around the corners so that the flashing at the corner portions of the curb normally is of increased `thickness as compared with the ilashing along the intermediate portions thereof. Consequently, it. is ditlicult to provide a water-tight joint between such flashing and adjacent rigid portions of a skylight structure mounted on the curb.

Referring particularly to Fig. 3, the present invention utilizes a curb anchor ling indicated generally by the numeral 7, which is generally annular in shape of a coniguration corresponding to the skylight opening, illustrated in the drawings as being rectangular in shape and is provided with a horizontally extending portion 8 adapted to seat upon the top edge 5 of the curb 4, the member '7 being constructed from suitable stock and welded or otherwise fabricated into a single annular member extending around the top of the curb. The member 7 may be formed with an upwardly extending flange 9 at the inner peripheral edges of the portion 8, the ilange 9 in the embodirnent of the invention illustrated being inclined as clearly shown in Fig. 3. Extending downwardly from the outer peripheral edge of the portion 8 is a flange 11, the latter being spaced outwardly from the adjacent face of the flashing 6 and extending in generally parallel relation with respect to the outer face of the curb. The

anchor ring 7 may be secured to the curb 4 by any suitable means, as for example, drive screws 121 extending through the horizontal portion 8 into the top portion of the curb.

Positioned on the anchor ring 7 is an annular shaped base frame indicated generally by the numeral 13, comprising side members 14 and end members 15, each constructed in the form of a box channel having inner and outer side walls 16 and 17, respectively, a top wall 18 and a bottom or base wall 19. The side and end members may be suitably constructed as fabricated sections, the elements of which are welded or otherwise secured as an integral assembly, and the respective members are connected together at their adjoining ends by welding or other suitable means, whereby the frame 13 is a single integral structure.

As illustrated in Fig. 3, the base wall 19 extends inwardly from the inner side wall 16 and is pitched outwardly, with the inner end 21 of the base wall terminating in a downwardly extending flange 22 extending parallel to and abutting the adjacent face of the flange 9 of the curb anchor ring 7, the flanges 9 and 22, if desired, being rigidly connected together by suitable means such. as a plurality of screws 23. The outer wall 17 of the frame is provided with a downwardly depending portion 24 positioned below the plane of the base wall 19, and extending downwardly from the latter adjacent to but spaced from the portion 24 of the wall 17 is a flange 25, the latter extending substantially parallel to and abutting the outer face of the flange 11 of the curb anchor ring. The flanges 11 and 25, if desired, may be secured together by any suitable means, as for example, by a plurality of screws 26 extending through the flange 25 and threaded into the flange 11, the frame being secured to the anchor ring by either or both the screws 23 and 26.

Positioned between the flanges 11 and 25 and the flashing 6 of the curb is an elongated ashing strip indicated generally by the numeral 27, the latter having an intermediate portion 28 which is adapted to seat on the outer face of the flashing 6 and may be secured to the curb by drive screws or nails 29. The upper edge portion of the flashing strip 27 may be reversely bent as indicated at 31 to form an outwardly extending sealing portion 32 adapted to bear on the inner face of the flange 11, and the opposite edge portion of the strip 27 may extend angularly from the hashing 6 to the depending portion of the flange 25 and bent back toward the flashing, such portion engaging flange 25 at the bend 33, with the lower edge 34 engaging the flashing. It will be apparent that the strip 27 effectively closes the space between the flanges 11 and 25 and the flashing 6 to restrict the entrance of water or moisture from the exterior into such space and thus prevent such water from reaching the top of the curb. The strip 27 is preferably formed from light gauge metal or other suitable semi-resilient material, whereby the strip will readily conform to any irregularities in the flashing 6, particularly at the corners of the curb to form an effective seal, the strip bearing on the flashing at two points and on both the ange 25 and the ange 11, forming a double seal at both sides of the space therebetween. lt will be particularly noted that the elements anchoring the skylight to the curb extend into the top of the curb whereby the sealing efficiency of the flashing 6 is not impaired thereby.

In the embodiment of the invention illustrated, the outer wall 17 of the frame extends generally parallel to the flanges 11 and 25, while the inner wall 16 extends generally parallel to the flange 22. Likewise, the top wall 18 of the frame is illustrated as extending generally parallel to the inclined base wall 19.

Supported on the top wall 18 of the frame 13 is a dome structure indicated generally by the numeral 35,

illustrated as being formed from a suitable plastic or the like, and overlying the peripheral edge portions of the dome 35 is a retaining member 36 illustrated as being generally L-shaped in cross section, having a downwardly extending leg portion 37 which depends below the top wall 18, with its inner face abutting the outer face of the outer wall 17. The member 36 is also provided with a leg portion 38 extending parallel to the top wall 18 adapted to overlie the peripheral edge portions of the dome 35. Interposed between the latter and the top wall 18 is a gasket strip 39, and interposed between the outer face of the dome and the leg 38 of the member 36 is a similar gasket strip 40, the latter being of suitable resilient material, as for example, Neoprene If desired the gaskets 39 and 40 may be respectively secured to the top wall 18 and the leg 38 of the member 36 by a suitlable adhesive 41, or the like.

As illustrated in Fig. 3, the free edge of the portion 38 may be provided with an inwardly extending shoulder 42 adapted to depress the gasket material 4t? to provide increased sealing pressure at such edge. The member 36 may extend continuously around the peripheral edges of the dome 35 or may be constructed as a plurality of elements and may be secured to the frame 13 by any suitable means, as for example, screws 43 passing through the leg 37 and threaded into the side wall 17. Assuming the dome 35 is Constructed from a single piece of material, the peripheral edges of the single piece dome would be sealed by the gaskets 39 and 4t) and the member 37, completing the mounting of the dome o-n the frame 13.

To provide for drainage of condensate or other accumulated moisture at the interior of the skylight, thc inner walls 16 of the frame may be provided with a plurality of spaced openings 44 therein, the latter being positioned adjacent the base wall 19, and the base wall 19 is provided with a plurality of openings 44', the latter being positioned between the ange 25 and the outer wall 17, whereby liquid may ow from the skylight interior through the openings 44 and 44', to the exterior thereof. While the openings, for the purposes of explanation, are illustrated in Fig. 3, as being transversely aligned, in actual practice the openings 44 would be staggered with respect to the openings 44', whereby a direct path through the side members is eliminated. These openings permit a slight flow of warm air from the skylight interior through the members 14 and 15 to the exterior and are sufficient to materially reduce ice formation at the openings 44 and thereby insure adequate drainage, it being noted that the pitch of drainage surfaces is such that rapid ow or discharge of water is effected which also reduces the formation of ice.

In some cases, it may be desired to form the dome in a plurality of individual sections, as for example, Where the skylight structure would be of such a size that it would be impractical or dicult to fabricate the dome as a single piece. In such case, the dome may be constructed in a plurality of sections 35a and 35h as illustrated in Figs. l and 2, the sections 35a being constructed in the form of end sections having three peripheral edges adapted to engage corresponding portions of the top wall 18, while the section 35 is constructed with its end edges adapted to engage oppositely disposed portions of the top wall, and the two other edges conforming to the shape of the fourth edge of each section 35a, thereby in effect forming a continuation thereof. In this construction the adjoining edges of the sections 35a and 35b may be operatively connected in water-tight relation by a pair of members 45 and 46, the member 45 being positioned adjacent the inner faces of the sections at their opposing edges and the member 46 being positioned at the outer faces thereof in opposed relation with respect to the member 45. Interposed between the respective members 45 and 46 and the adjacent faces of the sections 35a and 35h are suitable gasket strips 47 and 4S. The members 45 and 46 may be connected by any suitable means, as for example, a plurality of bolts 49 carried by the member 45 and extending between the adjacent edges of the respective sections of the dome through the member 46, the outer end of each bolt having a cap nut 51 threaded thereon by means of which clamping forces may be applied to the members 45 and 46 and the gasket strips 47 and 48 therebetween, whereby the adjacent edge portions of the dome sections are effectively connected in water-tight relation. As illustrated in Fig. 3, the free end edges of the members 46 may extend to and abut the edge of the leg 38 of the members 36 and the ends of the inner members 45 may be provided with downwardly extending anges 52 adapted to abut the inner wall 16 and secured thereto by any r suitable means, as for example, a plurality of screws 53 extending through the respective flanges and threaded into the wall 16.

In the embodiment of the invention illustrated, the member 45 is of channel-shape construction having longitudinally extending flange portions 54 and a central rib 55 having a longitudinally extending T-shaped channel or groove 56 therein, the member 45 being suitably constructed, as for example, as an extruded aluminum shape. The outer member 46 is reinforced by a longitudinally extending central channel 57 which terminates at a point spaced from the free end of the member, as indicated at 58 in Fig. 3, both pairs of members 45 and 46 extending continuously across the dome 35 from one side member of the frame 13 to the opposite side member thereof, so that the only joints are at the ends of the respective members. The bolts 49 may be provided with a square head 59, such head being of slightly smaller size than the corresponding width of the slot 56 in the member 45, whereby the bolts are slidable in the slot 56 but are non-rotatable. Thus, the bolts may be positioned along the member 45 to bring the bolts 49 in alignment with the openings in the member 46. In this embodiment of the invention, the two gaskets 47 may be formed to engage the anges 54 and rib 55 as illustrated, forming a very efficient seal when the gaskets are placed under compression.

In installing the skylight on a supporting surface, as for example, the curb 4, the flashing strip 27 is iirst secured to the curb adjacent the top edge thereof at the outer face of the flashing 6, following which the curb anchor ring 7 may be seated on the top of the curb and secured thereto by drive screws 121 or other suitable means. The mounting of the ring 7 results in compression of the upper edge portion of the tlashing strip 27, whereby the portion 32 of the latter will rmly engage the inner face of the ange 11. Following the mounting of the ring 7, the base frame 13 is positioned thereon and secured in place by screws 23 and 26. Assuming the dome structure 35 is constructed as a single piece, the latter is placed on the top wall 18 of the frame, the gasket strip 39 being interposed therebetween, following which the gasket strip 40 is placed in position and the retaining member 36 engaged with the gasket 40 and secured to the outer wall 17 of the frame by means of screws 43.

- If the dome is of the multi-section type the bolts 49 may be positioned at the desired points on the inner member 45, the lattter being secured at. their respective ends to the wall 16 by screws 53. The sections of the dome may then be placed in position, the gasket strips 47 being engaged with the members 45, following which the gasket strips 48 and member 46 may be properly positioned and secured in place, with the assembly being completed by the attachment of the retaining members 36 It will be noted that the construction of the anchor ring 7 and frame member 19 is such that the structure may be readily secured in permanent position without piercing the rooting flashing covering the curb, thereby completely eliminating possible leaks from this source. It will also be apparent that the curb anchor ring being an integral relatively rigid unit acts as a guide or centering device when placed upon the curb and automatically equalizes pressure on the flashing strip 27, whereby substantially uniform sealing action is achieved and equalizing the same for variations in the outer face of the curb. It will also be noted that the construction of the frame member 13 is such that any condensate collecting on the dome will readily run down the latter to the wall 16, thence d own the wall to the base wall 19 and through the openlngs 60 in the wall 16 and t-o the exterior through the openings 60 in the base wall. Similarly, as the outer wall 17 of the frame depends below the base wall 19 and below the openings 44 therein, entry of rain or snow into the skylight structure is etfectively eliminated.

' Having'thus described our invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of our invention; hence, we do not wish to be understood as limiting ourselves to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

What we claim as new and desire to secure by Letters Patent is:

1. In a skylight, the combination of a curb anchor ring adapted to be mounted on the top of an outwardly extending annular skylight curb, said anchor ring being provided with a generally horizontally extending portion of annular shape positioned on the top of such a curb and having an upwardly extending flange at its inner periphery, and a downwardly extending flange at its outer periphery positioned adjacent to but spaced from the adjacent outer face of the curb, an annular base frame comprising side and end members constructed in the form of a box channel having inner and outer side walls, a top wall and a base wall, the latter wall extending inwardly and upwardly from the inner side wall and overlying said curb anchor ring, said base wall having a downwardly extending ange adjacent its inner edge abutting the inner face of said upwardly extending liange on the anchor ring, the outer side walls of said frame extending substantially perpendicular to the horizontally extending portion of said anchor ring with said wall extending downwardly below the plane of the base wall, said frame having a flange adjacent to but spaced from the outer side walls, extending downwardly from the base wall in substantially parallel relation with respect to the corresponding outer side wall, the inner face of said last-mentioned ange being positioned in abutting relation to said outer ilange of said anchor ring and depending therebelow, means for rigidly connecting one of said ilanges on said frame to the adjacent ange on Isaid anchor ring, a flashing strip of resilient material positioned between each such curbing face and the corresponding inner faces of the adjacent anges, said ashing `strip having a longitudinally extending intermediate portion secured to the adjacent curb face and longitudinal edge portions extending toward and engaging the respective adjacent anges operative to substantially close the space between such flange and said curb face and restrict the passage of liquid upwardly between the same, said inner wall of said frame having a series of openings therein adjacent said base wall, and the latter having a series of openings therein positioned between the outer side wall and the corresponding outer flange of said base frame to provide drainage to the exterior for liquids accumulating on said base wall, a dome-shaped cover of a size to be positioned on said base frame with the peripheral cover edges seated on the top wall of the base frame, clamping means of generally L-shape in cross section having one leg overlying the peripheral edges of said cover and the other leg extending in abutting relation to the corresponding outer side wall of the base frame, means operatively securing the last-mentioned leg to such side wall, and respective gasket means interposed between said top wall and clamping means and the opposed portions of said cover.

2. A skylight as defined in claim 1, wherein said domeshaped cover comprises a plurality of sections each extending continuously across said base frame from one side thereof to the opposite side with the outer edges of said cover seated on the top wall of said frame, an inner member and an outer member respectively positioned at the inner and outer faces of adjacent cover sections and spanning the juncture thereof, said members each extending continuously from one side of the base frame to the opposite side thereof, the inner member having a downwardly extending ange at each end thereof abutting the adjacent inner side wall of the base frame, means securing said anges to such inner walls, the outer member having its ends terminating adjacent said L-shaped clamping means, respective gasket means interposed between said division and cap members and the respective adjacent faces of the cover sections, and means at spaced points along said division and cap members operatively connecting the same for applying clamping forces thereto.

3. A skylight as defined in claim 1, wherein said domeshaped cover comprises a plurality of sections each extending continuously across said base frame from one side thereof to the opposite side with the outer edges of said cover seated on the top wall of said frame, an inner member and an outer member respectively positioned at the inner and outer faces of adjacent cover sections and spanning the juncture thereof, said members each extending continuously from one side of the base frame to the opposite side thereof, the inner member having a downwardly extending flange at each end thereof abutting the adjacent inner side wall of the base frame, means securing said flanges to such inner walls, the oute'r member having its ends terminating adjacent said L-shaped clamping means, respective gasket means interposed between said division and cap members and the respective adjacent faces of the cover sections, said inner member having a longitudinally extending channel therein adjacent the juncture of said sections, and means at spaced points along said members engaged with the side walls lof said channel for operatively connecting said niemers.

.4. ln a skylight, the combination of a curb anchor ring adapted to be mounted on the top of an outwardly extending annular skylight curb, provided with a generally horizontally extending portion of annular shape positioned on and secured to the top of such a curb, an annular base frame comprising side and end members constructed in the form of a box channel having inner and outer side walls, a top wall and a base wall, the outer side walls of said frame extending downwardly below the plane of the base wall, said frame having a flange adjacent to but spaced from the outer side walls, extending downwardly from the base wall in substantially parallel relation with respect to the corresponding outer side wall, the inner face of said last-mentioned flange being positioned adjacent to but spaced from the corresponding face of such a vskylight curb, means for rigidly securing said frame to said curb anchor ring, a ashing strip of resilient material positioned between each such curbing face and the corresponding inner face of the adjacent flange, said flashing strip having a portion engaged with the adjacent curb face and a portion extending toward and engaging the 4adjacent flange operative to substantially close the space between such flange and said curb face and restrict the passage of liquid upwardly between the same, said inner wall of said frame having a series of openings therein adjacent said base wall, and the latter having a series of openings therein positioned between the outer side walls and the corresponding outer flanges of said base frame to provide drainage to the exterior for liquids accumulating on said base wall, a domeshaped cover of a size to be positioned on said base frame with the peripheral cover edges seated on the top wall of the base frame, and means for operatively securing the peripheral edges of said cover to said frame in fluid-tight relation.

5. In a skylight, the combination of a curb anchor ring adapted to be mounted on the top of an outwardly extending annular skylight curb, said anchor ring being provided with a generally horizontally extending portion of annular shape positioned on the top of such a curb and having an upwardly extending ange at its inner periphery, an annular base frame comprising side and end members co-nstructed in the form of a box channel having inner and outer side walls, a top wall and a base wall, the latter wall VVextending inwardly and upwardly from the inner side wall and overlying said curb anchor 8 ring, said base wall having a downwardly extending flange adjacent its inner edge abutting the inner face of said upwardly extending flange on the anchor ring, means for securing said flanges together, the outer side walls of said frame extending substantially perpendicular to the horizontally extending portion of said anchor ring with said wall extending downwardly below the plane of the base wall, said frame having a ange adjacent to but spaced from the outer side walls, extending downwardly from the base wall in substantially parallel relation with respect to the corresponding outer side wall adjacent to but spaced from the corresponding face of such a skylight curb, a flashing strip of resilient material positioned between each such curbing face and the corresponding inner face of the adjacent ange, said ashing strip extending between and engaging the adjacent iange and curb face operative to substantially close the space therebetween and restrict the passage of liquid upwardly between the same, said inner Wall of said frame having a series of openings therein adjacent said base wall, and the latter having a series of openings therein positioned between the outer side walls and the corresponding outer flanges of said base frame to provide drainage to the exterior for liquids accumulating on said base wall, a dome-shaped cover of a size to be positioned on said base frame with the peripheral cover edges seated on'the top wall of the base frame, clamping means of generally L-sliape in cross section having one leg overlying the peripheral edges of said cover and the other leg extending in abutting relation to the corresponding outer side wall of the base frame, means operai tively securing the last-mentioned leg to such side wall,

and respective resilient gasket means interposed between said top wall and clamping means and the opposed portions of said cover.

6. In a skylight, the combination of a curb anchor ring adapted to be mounted on the top of an outwardly extending annular skylight curb, said anchor ring being provided with a generally horizontally extending portion of annular shape positioned on the top` of such a curb and having a downwardly extending ilange at its outer periphery adapted to be positioned adjacent to but spaced from the adjacent outer face of such a skylight curb, an annular base frame comprising side and end members, a side wall, a top wall and a base wall, the latter wall overlying said curb anchor ring, said frame having a llange extending downwardly from the base wall positioned in abutting relation to said ange of said anchor ring and depending therebelow, securing means connecting said flanges, a dashing strip of resilient material positioned between each such curbing face and the corresponding inner faces or" the adjacent ilanges, said ashing strip having an intermediate portion secured to the adjacent curb face and edge portions extending toward and engaging the respective adjacent anges operative to substantially close the space between such anges and said curb face and restrict the passage of liquid upwardly between the same, a dome-shaped cover of a size to be positioned on said base frame with the peripheral cover edges seated on the top wall of the base frame, resilient gasket means interposed between said top wall and the opposed portions of said cover, and means for operatively securing the peripheral edges of said cover to said frame in fluid-tight relation.

7. ln a skylight, the combination of a curb anchor ring adapted to be mounted on the top of an outwardly extending annular skylight curb, said anchor ring being provided with a generally horizontally extending portion of annular shape, and having an upwardly extending flange at its inner periphery, and a downwardly extending flange at its outer periphery, an annular base frame comprising side and end members constructed in the form of a box channel having inner and outer side 9 walls, a top wall and a base wall, the latter wall extending inwardly'and upwardly from the inner side wall and adapted to overlie said curb anchorring, said base wall having a downwardly extending flange adjacent its inner edge adapted to abut the inner face of said upwardly extending ange on the anchor ring, the outer side walls of said frame extending substantially perpendicular to the horizontally extending portion of said anchor ring with said wall extending downwardly below the plane of the base wall, said frame having a auge adjacent to but spaced from the outer side walls, extending downwardly from the base wall in substantially parallel relation with respect to the corresponding outer side wall, the inner face of said last-mentioned ange being adapted to be positioned in abutting relation to said outer flange of said anchor ring and depend therebelow, means for rigid* ly connecting one of said flanges on said frame to the adjacent flange on said anchor ring, said inner wall of said frame having a series of openings therein adjacent said 'base wall, and the latter having a series of openings therein positioned between the outer side wall and the corresponding outer flange of said base frame to provide drainage to the exterior for liquids accumulating on said base wall, a dome-shaped cover of a size to be positioned on said base frame with the peripheral cover edges seated on the top wall of the base frame, clamping means of generally L-shape in cross section having one.

leg overlying the peripheral edges of said cover and the other leg extending in abutting relation to the corresponding outer side wall of the base frame, means operatively securing the last-mentioned leg to such side wall, and respective gasket means interposed between said top wall and clamping means and the opposed portions of ysaid cover.

8. In a skylight, the combination of a skylight structure mounted on the top of an outwardly extending annular skylight curb according to claim 7, including a ashing strip of thin resilient material interposed between and engaged with such curb faces and the downwardly extending flange of said anchor ring and the inner face of said flange of the annular base frame which is positioned in abutting relationship to the aforesaid downwardly extending ange of said anchor ring and operative to restrict the passage of liquid therebetween.

9. In a skylight, the combination of a skylight structure mounted on the top of an outwardly extending annular skylight curb according to claim 7, including a ilashing strip of thin resilient material interposed between such curb faces and the downwardly extending ange of said anchor ring and the inner face of said flange of the annular base frame which is positioned in abutting relationship to the aforesaid downwardly extending flange of said anchor ring and operative to restrict the passage of liquid therebetween, said strip having a longitudinally extending intermediate portion secured to such a curb, one edge portion of said strip being generally U-shaped with the free edge thereof bearing on the skylight structure, the opposite edge portion extending angularly outward from the intermediate portion and angularly inward toward such a curb, forming an apex engaging said inner face of said aforementioned ange of the annular base frame with the free edge thereof engaging the curb.

10. In a skylight, the combination of a curb anchor ring mounted on the top of an outwardly extending annular skylight curb, said anchor ring being provided with a generally horizontally extending portion of annular shape having a downwardly extending flange at its outer periphery, an annular base frame comprising side and end members, each having a side wall, a top wall and a base wall, the latter wall overlying said curb anchor ring, said frame having a flange extending downwardly from the base wall and positioned in abutting relation to said flange of said anchor ring and depending therebelow, securing means connecting said flange, a dome shaped cover positioned on said base frame with the peripheral cover edges seated on the top wall of the base frame, resilient gasket means interposed between said top wall and the opposed portions of said cover, and means for operatively securing the peripheral edges of said coverI to said frame in fluid-tight relation.

References Cited in the iile of this patent UNITED STATES PATENTS 1,090,186 Yauch Mar. 17, 1914 1,931,750 Blaski Oct. 24, 1933 2,260,438 Cheney Oct. 28, 1941 2,703,060 Kiefer Mar. 1, 1955 2,790,400 Wasserman Apr. 30, 1957 FOREIGN PATENTS 250,235 Italy of 1926 521,482 Germany Mar, 24, 1931

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