US2902728A - Window structures - Google Patents

Description

Sept. 8, 1959 M. J. NARDULLI wmnow STRUCTURES 4 Sheets-Sheet. 1

Filed June 11, 1953 i is Sept. 8, 195 M. J. NARDULLI wmnow STRUCTURES 4 Sheets-Sheet 2 Filed June 11, 1955 ll/V 4 1 a? a: Q Mu neg/p Sept- 8, 1 5 M. J. NARDULLI WINDOW STRUCTURES 4 Sheets-Sheet 4 Filed June l1, 195s in .I 1%.!

In venlor fc/zae/ 5% United States l atent WINDOW STRUCTURES Michael J. Nardulli, Elmwood Park, ill. Application June 11, 1953, Serial No. 362,355

1 Claim. (Cl. 20-53) This invention relates to. window structures, and particularly to window structures of the awning type wherein one or more horizontally elongated and relatively narrow window sash are mounted for pivotal movement about an axis located adjacent to their upper edge so that such sash may be moved outwardly to open positions.

Awning type windows of the aforesaid character are usually made in such a way as to provide actuating mechanism that is operable from the inside of the window frame, and operating mechanism of this character is usually considered necessary because of the fact that such awning type windows are in most instances provided with an inside screen or storm sash which makes the awning type windows relatively inaccessible from the inside of a building, Such awning type windows are not only quite expensive, but are diflicult to mount and are difiicult to clean, particularly on the outside surfaces of an upper one of such sash. It is therefore the primary object of the present invention to reduce the cost of manufacture and installation, and simplify the upkeep of awning type windows of the aforesaid character. More specifically, it is an important object of the present invention to provide awning type windows wherein the individual sashmay be readily and easily moved between open and closed positions, and a related object is to provide awning type windows of this character that are exceptionally well sealed against wind and rain about all the edges thereof.

Because of the complicated mounting and actuating structures heretofore utilized in awning type windows, many objectionable dirficulties have been encountered in the use of such awning type windows in building construction. Thus the complicated nature of the mounting and actuating means for such windows has made it necessary to mount the entire sash frame and all. of the sash and actuating means in place in the building wall early in the construction of the building, and: it has been necessary to leave the sash and the actuating means in position during the subsequent buildingoperations. This has resulted in breaking of the window panes, marring or breaking of the sash frames and the actuating means, and has necessitated an extremely thorough cleaning operation in respect to the sash and the actuating means after the building construction has been completed. It is therefore an important object of the present invention to eliminate these objectionable difficulties that. have heretofore beeninvolved in the use of awning typewindows, and related and more specific objects are to enable awning type windows of the aforesaid character to be so constructed and arranged that the individual sash thereof may be readily mounted in or removed from their usual positions, thereby to simplify the original installation, as well as subsequent cleaning of the window sash. Another object-is to provide a complete awning type window installation wherein inside screen or storm sash are so related. to the awning type window sash that the individual awningtype sash may-be readily ice and easily reached by the user from within the room for the purpose of opening or closing such individual awning type window sash.

Most awning type window structures are of such a character that they require special installation and hence such awning type windows are very seldom used in old buildings because of the extensive remodeling work entailed in the installation of such windows. It is therefore another important object of the present invention to provide an awning type window structure that is particularly adapted for mounting in older buildings, with the minimum of installation work, and a related object is to provide such an arrangement which, when applied to new buildings, enables such awning type window structures to be economically stocked and sold by dealers who must, of course, keep stocks of other windows. One instance where the present awning type window structure is particularly advantageous is in connection with the merchandising of certain types of removablesash vertically .slidable double hung window structures. Such removable double hung window structures have received wide distribution through the sales activities of R. O. W. Sales Company of Royal Oak, Michigan, and these window installations conventionally provide upper and lower wood frame sash that are mounted in individual full length vertical guideways that are made from sheet metal and which are usually termed sash guides. In these window installations, the sash. guide on one side of the window frame is disposed in a fixed position, while the opposed and. cooperating sash guide at thev other side of the window has spring means associated therewith so that the sash may be pressed laterally of the Window frame opening thus to enable the sash to be released from the stationary sash guide for ready removal of the sash for cleaning or similar purposes. The spring means that act on the yieldable sash guide serve to press against the adjacent side of the window sash and this provides for a frictional action. between the sash and the sash guides. This frictional action is effective to'maintain the sash in different positions of vertical adjustment.

'Such conventional R. O. W. window installations require one set or cooperating pair of sash guides for each of the upper and lower window sash, but as described in my copending applications, Serial No. 121,975, filedl October 18, 1949, now Patent No. 2,651,083, patented September 8, 1953, and Serial No. 361,047, filed June 11, 1953, now abandoned, one setof sash guides may be utilized to mount. both upper and lower sash, thus to enable an inner setof prime windows to be provided in one of the pairs; of sash guides, while an: outer set of dou'blehung storm sash: orscreens may be provided in the other or outer pair of sash guides. In the first of the two above mentioned pending applications, the; sash are madewithwood frames, and are-relatively thin,-,and special physical characteristics are embodied inthesash sothat the sash, guides need notbe modified in any; way inthe mounting of these special sashin a common. sash guide. In the secondof the above mentioned copending applications, the sash guidesare somewhat modified, and thin sash, p referablyzmade with metal frames, are mounted with the. upper and lower sash of a pair mounted; in-the same set or; pair of sash guides. The, structures; thus disclosed in,- the two: abovementioned copending: applica;- tions thus extend the; range of. window structures that may be offered; by a dealer to utilize thesarne basic window frame structure, and a further and important object of the present: invention is to still further en-: large the ran-geof windowstructuresandstyles that may be offered by such a dealer by enabling awningtype windows to-be readily and easily provided'in the same basic window frame structure: More specifically, =it-is an object of the present invention to provide an awning type window structure that may be mounted in a pair of sash guides of a conventional R. O. W. window frame, thus to leave the other set of sash guides of such a conventional window frame for the removable mounting of double hung window screens or storm sash. A related object is to so mount the storm window sash or screens in such a window structure that the manual adjustment of the awning type sash is materially facilitated.

A further object is to provide a simple and effective means for holding the awning type sash in their open positions, and to enable such a holding and adjusting means to be readily disconnected when the awning type sash are to be individually removed from the supporting means.

Other and further objects of the present invention will be apparent from the following description and claim and are illustrated in the accompanying drawings which, by way of illustration, show a preferred embodiment of the present invention and the principles thereof and what I now consider to be the best mode in which I have contemplated applying these principles. Other embodiments of the invention embodying the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the purview of the appended claim.

In the drawings:

Fig. 1 is an outside elevational view of a window structure embodying the features of the invention;

Fig. 2 is a vertical sectional view taken substantially along the line 2-2 of Fig. 1;

Fig. 3 is an enlarged portion of Fig. 2 illustrating details of the holding means for holding the awning type sash in difierent adjusted open positions;

Fig. 4 is a top plan view of the holding means with the window sash in an open position;

Fig. 5 is a top plan view of the holding means in position that it assumes when the sash is closed;

Fig. 6 is a horizontal sectional view taken substantially along the line 66 of Fig. l, the parts being shown at an enlarged scale;

Fig. 7 is a vertical sectional view of the upper portion of the structure taken substantially along the line 7-7 of Fig. l and showing the parts in a partially assembled relationship;

Fig. 8 is a view similar to Fig. 7 and showing further details of the structure after assembly thereof;

Fig. 9 is a fragmentary perspective view taken partially in section to illustrate details of structure;

Fig. 10 is a fragmentary perspective View illustrating the corner bracket and pivot structure and the relation thereof to the vertical mounting strip; and

Fig. 10A shows an alternative corner bracket and pivot;

Fig. 11 is a fragmentary detail view illustrating the sealing means that may be applied between adjacent ones of the awning type sash.

For purposes of disclosure, the invention is illustrated as embodied in a window structure wherein a window frame is provided by jambs 31 and 32 that are connected at their upper ends by a head 33 and at their lower ends by a sill 34. The basic window frame structure as herein shown in Figs. 1 to 11 is, in all major respects, identical with a frame structure that has -'been made and sold for many years by R. O. W. Sales Company of Royal Oak, Michigan, and as heretofore merchandised, this frame structure has been utilized primarily as a mounting for a double hung window structure comprising an upper sash and a lower sash that were removably related to the frame and were held in the desired positions of vertical adjustment by spring means, as will hereinafter be described, but which in other respects were related to each other and to the window frame in substantially the same manner as in ordinary double hung window structures.

As herein shown, the invention has been embodied in such a way as to utilize the structural characteristics of the usual R. O. W. window frame and sash guide structure, and the outer pair of sash guides in such a window frame structure is utilized to serve as a part of the mounting means for a plurality of awning type window sash 20, while the inner pair of sash guides is utilized to provide a mounting means for double hung screens or storm sash ZIU and ML, as will be described in detail hereinafter. Through this arrangement, .the present invention is, in its more specific aspects, endowed with a characteristic of inter-changeability not only with the normal wood sash that have heretofore been used in R. O. W. window frames, but also with respect to thin sash of wood or metal that may also be mounted in such frames as taught in my two aforesaid copending applications.

Before proceeding to the particular arrangement of the sash under the present invention, it should be pointed out that in the conventional R. O. W. Sales Company frame structure 20, the sash guides on the opposite jambs 31 and 32 are substantially similar with the exception, however, that the inner and outer sash guides on the righthand jam b 32 are stationary, while the guides on the lefthand jamb 31 are yielding in character so that by moving a window sash of the usual kind to the left against the related one of the yielding left-hand guides, the sash may be disengaged from the right-hand guide and may be removed in an inward direction from the window frame structure 30. The basic guide arrangements herein illustrated in Figs. 1 to 11 are of the same general character as those manufactured and sold as aforesaid by R. O. W. Sales Company. Thus, as is best shown in Figs. 6, 7 and 9 of the drawings, the frame structure is provided with an inner set of vertical guides LG-l and RG-l, and an outer set of guides LG-2 and RG2. Each of these guides is formed from an elongated sheet metal member that is bent to form a channel shaped guideway 37 having a bottom wall 37B and side walls 378 and from the opposite edges of the outer ends of the side walls 378 of the channel, the metal is extended in opposite directions laterally as at 38 and 38A and then in a rearward or reverse direction as at 39 to provide what amounts to elongated legs 39 of substantial length. It will be observed in Fig. 6 that one of the side stops 38A is some what wider than the other, and in practice these wider stop elements 38A are located so that such stop members 38A are disposed next to each other and provide a relatively wide spacing structure in the position that is normally occupied by the parting bead in a double hung window structure. At spaced points throughout the length of the channel 37, mounting thimbles 40 are provided so that they extend through the bottom wall 373 of the channel 37 and have their lower or closed end walls disposed in the plane of the inner ends of the mounting flanges or legs 39. With respect to the right-hand guides RG1 and RG-Z, a screw 41 is extended through the bottom of each of the mounting thimbles 40, so as to thereby clamp the flange 39 against a plank member 32P that forms the side element of the left-hand jamb.

In respect to the left-hand sash guides L -I and LG-Z, it should be observed that exactly the same structure is employed, but in the left-hand jamb 31F of the window frame, a relatively deep mounting groove or space 45, Fig. 6, is provided, the bottom of which is provided by a plank element 311. The guides LG1 and LG2 are in this instance positioned in this deep channel so that the bottom of the flanges 39 are spaced from the plank 311?, and a plurality of springs 46 are put in place between these channels or sash guides and the plank 31F, thereby to urge the channels or sash guides in a right-hand direction. This outward movement is governed and limited by El) mounting screws 48 which are similar to the screws 41 but are relatively long, as will be evident in Fig. 9.

The sash guides that have thus been provided are conventional and would ordinarily be used, as hereinbefore pointed out, to receive an inner wood-framed sash in one sash guide and an outer wood-framed sash in the other sash guide, but as herein shown, these two sash guides respectively provide mountings for a double hung storm sash or screen structure and a prime window sash structure of the awning type.

The several sash 20 and 21 as herein shown have metal frames that in the present instance are formed by extru- 'sion, but except for some specific details of structure, as will hereinafter be described, the particular form and structure of the sash frame might be varied considerably within the purview of the present invention. As herein shown, the sash frames are formed from extruded metal members that are described in detail in my copending application, Serial No. 109,470, filed August 10, 1949, now Patent No. 2,666,508, patented January 19, 1954, and reference may be had to such prior application for details of such extruded sash frame members, as well as for most of the details of the manner of connection or assembly of the sash frame elements to each other. As used in the sash 20, and in any storm sash that may be submitted for the screens 21, the extruded metal member is preferably formed from aluminum and has an outer edge portion 53A and an inner edge portion 53B, and between these two edge portions a pair of grooves 53G are formed on the opposite surfaces of the member, and longitudinally thereof to provide a relatively thin connecting web 53W. The inner edge portion 53B is formed with a groove 54G that faces edgewise, and into which a panel of glass G may be inserted with an intermediate cushioning or sealing strip 55 that is of generally U-shaped cross section.

The outer edge portion 53A of the frame member is formed with a generally rectangular channel 56 that opens laterally or at right angles with respect to the open edge of the groove 546, and the channel 56 has a pair of ledge members 57 extended in from opposite sides thereof so as to define a slot 568 midway between the walls of the groove 56. These ledge members 57 are set inwardly from a face 57F of the edge portion 53A so that what amounts to a rabbeted groove 58 is formed. The groove 56 may, by reason of the ledges 57, be said to be an undercut groove, and when the side frame members of a sash are to be joined together, the end portions thereof are mitered, as at 59, and a right angle metal corner bracket 60 that has a cross sectional form corresponding to the cross section of the undercut groove 56, has its opposite ends inserted endwise into the undercut grooves 56 of the members that are to be connected. Binder head screws 61 are inserted downwardly or inwardly through the slot 565, and are threaded into the respective arms of the corner bracket 69, and the length of the screws 61 is such that they terminate short of the bottom wall of the groove 56. The binder heads of the screws 61 thus seat against the outer faces of the ledges 57, as shown in Fig. 10, to clamp upon the ledges 57 so as to secure the members of the sash frame together, and this is accomplished without distortion of the sash frame members.

The four corners of each sash 20 are joined together by corner brackets 60 that are substantially similar in form, but as to the corner brackets 60, they are used to connect the upper sash frame element with the two side frame elements, the horizontal element of the corner bracket has an extension 60F formed thereon which projects beyond the vertical edge of the sash frame to provide a pivot upon which the sash may be supported for the desired pivotal movement, as will be described in some detail hereinafter.

The corner bracket may also take the form indicated in Fig. A at 16% which-difiers from the bracket 60 in that the pivot takes the form of an extension 160? of Square cross section. This pivot 160? will, of course,

function properly as a journal when inserted in a cylindrical bearing or bore, as will be described.

In pivotally supporting the awning type sash 20 under the present invention, provision is made whereby such sash may be readily mounted in, or removed from their position of use, and in accomplishing this result in the form of the invention herein disclosed, use is made of the conventional sash guides LG]. and RG1 and the yielding mounting of the left hand sash guide LGl functions in enabling the sash 20 to be readily mounted or dismounted. Thus, as will be evident, particularly in Figs. 6 and 9 of the drawings, adapter strips or bars 70 are mounted in a cooperating relationship with respect to the sash guides LGll and RG1, and these adapters 70 are so arranged as to be located and held in position by cooperative engagement with the grooves 37 of the sash guides, and are further arranged to provide mounting and sealing means or surfaces for the sash 20. Thus, each adapter strip 70 is preferably formed as a hollow metal extrusion to provide main bottom surfaces 'ItlB that are arranged to face toward the sash guide upon which the adapter strip is to be mounted, and these surfaces 703 engage the faces 38 and 38A of the sash guide. Projecting from the surfaces 70B, a pair of locating ribs NR are formed on the strip 7% so as to project into the groove 37 of the sash guide and engage the respective side walls 378 of the groove. Thus the ribs NR serve to hold the strip 70 in the proper position in one direction, while engagement of the surface 7 0B with the surfaces 33 and 38A serve to hold the strip in position in the other direction. The strip 70, as shown particularly in Fig. 10 of the drawings, has its outer corner cut away to provide a rabbeted groove having a face 70F that is parallel to the surfaces 703 and 38 and to provide an outwardly facing shoulder 708 against which the inner face of the frame of the sash 20 may bear. The face 70F provides a surface against which the side edge of the side frame of the sash 20 may bear, and a pivot opening or here 72 is provided in the face 70F in position to receive the sash pivot 6 H. Thus it will be evident that when a sash 26 is to be mounted, the left hand pivot 60F may be inserted in the appropriate bearing opening 72 and the sash 2t) may be forced to the left so as to compress the springs 46 of the sash guide LGl. This :permits the right hand pivot 60F to be aligned with its bearing opening '72, after which the left hand pressure on the sash may be released so that the righht hand pivotal support will be established for the sas In adapting the sash 20 to the vertical dimension of the Window frame, it is desirable to assure a proper sealing of the window structure at all points, and this is partioularly true with respect to the upper and lower edges of the window structure. In accomplishing this, an upper header and a similar but reversed sub-sill 81 are provided, as shown particularly in Figs. 1, 2, 7 and 8 of the drawings. The members and 31 may be formed from an extruded member of the same cross section. Thus the member 80 comprises: vertical walls 80V and a cross web 80W which provide a generally U-shaped bar, and the walls 80W are provided with shoulders 803 to interlock with an extruded resilient rubber sealing member 82 that is inserted through the U-shaped member. One of the walls 80V has a flange 80F extended beyond the cross web 80W, and this flange serves a sealing and draining function in that it extends downwardly for a short distance along the outside surface of the upper edge of the sash 20. The lower or sill member 81 is reversed so that the flange 80F is located on the inner side of the lower edge of the lower sash 20. The resilient rubber sealing member 82, in this instance, rests upon the sill 34 of the Window frame. The upper cross member 80 is held in position by forming slots U, Figs. 7 and 8, in the upper ends ofthe strips 70 so that the ends of the member 80 may extend into these slots and rest freely therein. At their lower ends the strips 70 are slotted in a reverse manner as at 1'7tlL to receive and position the ends of the sub-sill 81.

When the sash are in their closed positions, they are adapted to be locked in such positions through the action of a plurality of locking handles 12% that are mounted on the lower frame members of the sash in a symmetrical relationship so that two handles 120 are provided on each sash. The handles 120 are fastened to the lower frame member of the sash by means of a screw 121, and one end of the handle 12f? is bent as at 128H so that it may be grasped by the user to pull the sash to its closed position. The handles may then be rotated about the axis of the screws 121 so that the curved handle portion 1201-1 of the handle engages the inner side of the upper frame element of the next lower sash, or so that engagement is elfected in the case of the lowermost sash 20 with the inner side face of the flange 89F of the sub-sill 81.

Means are provided for holding the sash 2a in outwardly tilted or open positions, and such means provide for adjustment of this open position as may be desired. Moreover, such adjusting means are so arranged that they act, in most instances, between the lower edge of one sash and the upper edge or frame element of the next lower sash, while in the instance of the lowermost sash 20, the adjusting means act between the lower edge of such sash and the sub-sill 81. As best shown in Figs. 3 to 5, such adjusting means comprise an adjustable link member having a rod 83 arranged to move endwise, and in a telescoping arrangement into a tubular member 84, and at one end, the tubular member 34 is externally threaded as at 85, and longitudinally split so that when an internally threaded clamping sleeve 37 is screwed downwardly on the threads 85, the split section of the tubular member 84 is clamped upon the rod 83, thus to enable the length of the rod to be readily adjusted. The other end of the tubular member 84 is connected by a pivot pin 88 to a threaded stud 39, and this threaded stud is screwed loosely through one arm 9llA of a mounting bracket 94). The other arm of the mounting bracket 94 is secured as by screws 91 to the inside face of the upper frame member of a sash 20, and the bracket 90 is so located that the threaded stud 89 is vertical and substantially parallel to the main plane of the sash 20. The other end of the adjustable link has a pivot pin 92. extended through the other end of the rod 83 so as to connect this rod pivotally to one arm 93 of an angle bracket, the other arm of which is pivotally connected by means of a shouldered screw 94 to the inner face of the lower frame member of the next higher sash 24 The pivot pin 92 and the shouldered screw 94 serve to provide what amounts to a universal joint connection for one end of the adjusting member, while the pivot pin 88 and the loose or rotatable mounting of the stud 89 provide a universal connection for the other end of the adjusting member. These two universal connections permit the adjusting rod $39-84 to conform with the pivotal movements of the two sash to which they are connected, and thus there is no binding of the adjusting means when the sash 29 are successively moved between open and crossed positions. When the windows are closed, the adjusting means 83-84 assume the substantially horizontal position shown in Fig. 5, wherein the adjusting device is parallel to the inner faces of the sash frames, and when the sash are to be removed the rod 83 is released and withdrawn from the sleeve 84.

While the locking of the sash in their closed positions by means of the locks 80 is effective to produce a relatively tight closing or sealing of the windows, there may be instances where additional sealing means may be desirable. In respect to the vertical end surfaces of the sash 2% it will be observed that the spring action of the sash guides is such that the ends of the sash 2% are held firmly against the face 7% of the adapter strips 7t), and while this provides a better seal than has heretofore been obtained in awning type windows, it may be desired to obtain still a better sealing action, and this may be at tained by mounting an extruded rubber or plastic sealing strip 95, Fig. 6, on the inside faces of the vertical frame elements of the sash. This can be readily accomplished by the use of an extruded resilient member having one portion thereof adapted to fit within the undercut groove of the frame element, as indicated at A in Fig. 6, and where this undercut groove is occupied by the vertical arms of the corner bracket an, the portion 95A may be cut away and the other portion of the sealing strip may be adhesively secured to the outer surface of the corner bracket and to the faces of the ledges 57.

As to the horizontal edges of the sash 20, a special re silient sealing strip may be provided of the form shown in Fig. 11 of the drawings. This strip 10% comprises a body ltltlA that is adapted to fit in the undercut groove 56 of the lower member of a sash 2%, and an outer portion ltltlB fits within the groove 58 that is formed on the ledges 57. From the lower edge of the portion ltltlB, a relative thin wall section ltltlW extends downwardly and then outwardly, and terminates in a downwardly bent lip 10014. When this strip is put in position, the wall ltltlW will be located between the adjacent horizontal edges of the sash, and the lip 1% will extend downwardly to provide a draining action. In respect to the lowermost one of the sash 29, the wall ltlllW will, of course, be disposed between the lower edge of the sash and the upper face of the sub-sill 81.

The screens ZlU and 21L are formed with metal frame members of the kind shown in Fig. 8 of the drawings, and these metal frame members are, in the present instance, formed as extrusions with an outer edge portion 53A that is of the same form that has been described in respect to Fig. 10 of the drawings. The inner edge portion is, in this instance, formed differently so as to provide a laterally opening groove 154G that faces in the direction opposite from the groove 56. The screen S is anchored at its edges in the grooves 1546 by means of a resilient plastic or strip 155, and the corners of the frame elements of the screens are joined together by corner brackets of the kind that are utilized in the lower corners or" the sash 20. The sash or screens 21U and 21L are slidably supported in what may be termed the reverse of a double hung relationship in the sash guides RG2 and LGZ, and to enable this to be accomplished, a divider strip is put in place in each of these sash guides, as shown in Figs. 6 and 9. This divider strip is of the kind shown in my copending application, Serial No. 361,047, filed June 11, 1953, now abandoned, and it serves to divide the groove of the sash guide intotwo sash runways, as described in such copending application. In the present instance, the use of the awning type sash is facilitated by reversing the normal relationship in respect to these screens or sash ZlU and 21L, so that the upper sash is located in the inner sash runway, and the lower sash is located in the outer sash runway. With this relationship, the lower edge of the upper sash is constantly exposed so that it may be grasped to move the upper sash down, thus facilitating access to the upper ones of the awning sash 20. The lower element of the sash 21L has a handle 112 fixed thereon, as shown in Fig. 8, so that this sash may also be readily actuated to give access to an awning type sash 20 that is opposite the lower screen.

At its upper edge, the upper screen 21U is arranged to abut against the lower face of a cross member that is of the same cross sectional form as the member 80 hereinbefore described, and a rubber sealing strip 182 of the same kind engages an upper edge of the window frame. In this instance, the member 1% is reversed so that the flange lSflF overhangs the inner face of the upper sash EU, as will be evident in Fig. 8. In the case of the cross member 18%, the ends of this member engage directly against the part of the divider strip that forms the bottom of the inner sash runway, and to provide a mechanical inner lock for sustaining the cross member 180, a rounded protrusion 183 is provided in the bottom wall of the adapter strip 110 in such a position that it will engage in the end of the space occupied by the rubber sealing member 182, and this protrusion is illustrated as to its location in Fig. 7 of the drawings.

The lower edge of the lower sash 21L is arranged to bear against a special relatively wide sill member 115 that is of general U-shaped cross section, and which is arranged with vertical walls 115A and B of unequal height so that when these vertical walls engage the sill 134, the top wall 115T will be disposed in a horizontal position and in the same horizontal plane as the inner window sill 134. The top wall 115T is slotted to receive the central bead of the adapter strip 110, and the sill 115 is cut to such a length that it fits at its opposite ends into the two sash grooves provided at each side of the installation, thus to fix the sill 115 in the proper position. It will be noted that the inner sill 134 extends outwardly, as shown at 134A, so that it substantially abuts the adjacent wall 115B of the sill 115, and this provides a finished appearance in the structure.

It will be recognized that the screens 21U and 21L may be readily removed and replaced by storm sash which may have the frame elements thereof made in the same way as the frame elements of the sash 20, and thus the installation provides for both summer and winter use, and all of the sash elements may readily be removed for cleaning. Moreover, the sub-sills 81 and 115 may be readily removed when desired to facilitate cleaning of the sill 34 and to assure drainage of any water that may collect on the sill.

From the foregoing description, it will be apparent that the present invention enables the cost of manufacture and installation of awning type windows to be reduced, and materially simplifies the installation and upkeep of such windows. Furthermore, it will be apparent that the present invention enables the individual awning type sash to be readily removed from, or placed in, their positions of use, thereby to simplify the normal use and cleaning of such windows, as well as to facilitate the construction operations involved where windows of this type are to be used.

It will also be evident that the present invention enables the individual sash to be readily and easily adjusted, and that inside storm sash or screens are provided in such a manner that the adjustment or removal or replacement of the awning type sash may readily be accomplished.

It will also be evident that the present invention provides an improved and simplified adjusting and holding means for awning type sash, and that such adjusting and holding means are to be arranged as to simplify the removal and replacement of the awning type sash.

It will also be apparent from the foregoing description that the present invention enables awning type windows to be installed in window frames having yielding sash guides of a common commercial kind, thus to provide a wide field of use for such awning type sash in new buildings, as well as in old buildings where such yielding sash guides have been used.

Thus, while I have illustrated and described the preferred embodiments of my invention, it is to be understood that these are capable of variation and modification, and I therefore do not wish to be limited to the precise details set forth, but desire to avail myself of such changes and alterations as fall within the purview of the following claim.

I claim:

In a removable window sash structure, a frame comprising jambs, a transverse upper member and an outwardly sloping lower sill, means on the respective jambs defining a pair of opposed parallel vertical sash guides of predetermined width and each embodying an inner stop and an outer stop, one of said guides being yieldable to enable sash to be successively engaged with the yieldable guide and then with the other guide for mounting the sash in such guideways, an awning type sash having upper and lower edge members and with aligned pivots projecting endwise from the ends of said upper edge member, mounting strips seated in the respective sash guides and engaged with the inner and outer stops thereof, said strips having sealing faces parallel to each other for engagement with the side edges of such sash and having sealing shoulders in a common plane for engagement by inside border areas of the side edges of such sash, an upper cross member and a lower sill, extended between said mounting strips, and said mounting strips having aligned bearing openings formed therein through the respective sealing faces to receive and support said pivots.

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