Abstract:
A fitting adapted for a window with a frame and a wing connected to the frame by at least one hinge. The fitting includes a carrier piece that cooperates with an edge of the wing and an edge of the fixed frame, and a plurality of laths engaging the carrier piece in a shiftable fashion along the edge of the wing. The carrier piece defines at each end portion thereof a toothed profile configured and dimensioned to mutually engage a toothed profile defined at each end portion of the laths.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to a fitting for a window with a fixed frame and a wing, which fitting comprises at least one carrier piece which is shiftably attached to an edge of the wing, the fixed frame, respectively, in a fitting groove, and to laths which can be displaced by this carrier piece, which laths can be shifted in a fitting groove on said edge and possible on other edges of the wing or the fixed frame, of which at least a number are provided with at least one pin which cooperates with a closing part attached to the fixed frame, the wing, respectively. 
     The locking and unlocking of such window is commanded by a handle attached to the wing or the fixed frame, which handle engages with a portion into the carrier piece in order to displace it. 
     However, the windows have different dimensions, such that the lengths of the laths may differ from window to window. 
     2. Discussion of the Related Art 
     With known fittings, these laths are extruded profiled stiles of aluminum which are sawn to size by the window manufacturer, in function of the dimensions of the window and the position of the handle, and which subsequently are bored or punched in order to form openings which are necessary to couple them, by means of pins, to the carrier piece and possibly together or to other parts. 
     The sawing to size of the laths and the boring or punching of the openings is very time-consuming for the manufacturer and requires relatively expensive machines, such that the manufactured laths are relatively expensive. 
     In the first place, this is the case if laths are not only present along the edge where the carrier piece is situated, but also along an edge directed perpendicular thereto, whereby laths are connected by means of a corner connection. 
     This is the case, for example, with a turn and tilt window. 
     A turn and tilt window comprises a wing which can hinge at one upright side of the fixed frame as well as tilt at the underside. 
     The transition from tilting to turning or reverse is also commanded by the handle which is attached to the wing and engages into the carrier piece which is shiftably provided on an upright edge of the wing. This carrier piece is connected, by means of laths, to a tilting pin at the underside and, by means of laths and a corner connection, connected to a scissors mechanism which is mounted between the wing and the fixed frame. 
     This means that at least along the edge with the carrier piece and between the corner connection and the scissors mechanism, the laths must have a well-defined length, and the sawing of the laths then must be performed very precisely. 
     SUMMARY OF THE INVENTION 
     The present invention aims at providing a fitting, the laths of which no longer have to be sawn to size and punched by the manufacturer and which thus can be placed faster on a window, and whereby the laths are less expensive. 
     According to the invention, this aim is achieved in that, in a first form of embodiment, the carrier piece, with each of its extremities, is coupled to a lath by means of mutually engaging toothed parts, to wit a toothed part at the extremity of the lath and a toothed part at the extremity of the carrier piece. 
     By having the toothed parts mutually overlap to a major or minor extent, the overall length of the laths along an edge can be pre-set. Thus, the laths also can be manufactured beforehand at the company&#39;s premises, with a number of standard sizes. 
     The length of the toothed parts is at least 5 cm, and preferably at least 6 cm. 
     In order to have the toothed parts mutually engage with the desired overlapping in an easy manner, the carrier piece preferably is provided with springy legs, with which it is snapped into the fitting groove. 
     The laths first can be slid in the fitting groove into the desired position, after which the carrier piece is snapped onto this fitting groove, such that the toothed parts mutually engage. 
     According to a second form of embodiment, said aim is achieved in that a punching screw is screwed into each extremity of the carrier piece, and that the lath coupled to this extremity is slid with one en d into the fitting groove underneath said extremity of the carrier piece and the punching screw is screwed into or through this extremity of the lath. 
     As long as the punching screw is not screwed into the lath, the lath can be slid deeper or less deep under the carrier piece. Thus, the length of the laths along an edge can be adjusted, as a result of which the laths can be delivered beforehand by the manufacturer with a standard length. Beforehand, these laths need not have any openings for the coupling. 
     This form of embodiment with a punching screw is recommended in the first place when a burglary delay is desired. 
     The carrier piece preferably comprises a rib at one side and at the other side a groove which are slidably provided under, over, respectively, an edge of the fitting groove. In its side directed towards the bottom of the fitting groove, the carrier piece may comprise a recess for a flat extremity of a lath, which, for example, may comprise beveled edges. 
     In both forms of embodiment, the possible adjustment in the longitudinal direction of each coupling is, for example, 50 mm, such that in the longitudinal direction of the laths, a difference in length of 100 mm can be taken up. 
     In both forms of embodiment, the laths coupled to the carrier piece also can be provided with a toothed part at 1 their extremity distant from this latter, which toothed parts engages into a complementary toothed part of a part, for example, another lath, the movable part of a corner connection or the like. 
     In consideration of the fact that these toothed parts do not have to be used for an adjustment in length, they may be shorter and have larger teeth then the aforementioned toothed parts. 
     One of the mutually engaging toothed parts may be provided at the inner side of a hollowed thickened extremity, the other toothed part, for example, on a narrowed extremity. 
     Thus, the fitting may comprise one or more laths which are provided with a toothed part on both extremities, whereby these toothed parts may be complementary or equal. 
     In both forms of embodiment, the carrier pieces and the laths may be manufactured of synthetic material, for example, polyamide, preferably reinforced by fibers, such as glass fibers. 
     As a result thereof, the laths and other parts can be manufactured in a relatively inexpensive manner, for example, by injection molding. 
     The fitting may extend over more than one edge of the window, in which case it comprises at least one corner connection with a fixed part and a part which is movable therein, whereby an extremity of the movable part is connected to an extremity of the lath in the fitting groove by means of mutually engaging toothed parts. 
     A corner connection which, with a part, is situated on the same edge as the carrier piece, can be coupled to a lath along an edge standing perpendicularly thereupon by means of similar toothed parts as those by which the carrier piece is coupled to a lath, according to said first form of embodiment. 
     The fitting of a window, amongst others, the fitting according to any of the aforementioned forms of embodiment, can comprise a ramp-forming part which is provided at the fixed frame. 
     With known windows and known fittings, this ramp-forming part is fixed on the window with a screw, which is time-consuming. 
     The invention aims at enabling a faster mounting of the ramp-forming part. 
     According to the invention, this aim is realized in that the ramp-forming part is snapped onto the fixed frame and, to this aim, comprises at least one springy leg which, with a small edge, engages under a small edge of a fitting groove on the fixed frame. 
     This ramp-forming part may be manufactured of synthetic material, for example, polyamide, possibly reinforced by fibers, such as glass fibers. 
     The fitting may comprise a locking part which is fixed on an upstanding edge of the fixed frame and which, with its lower extremity, sits in an opening which is provided in the ramp-forming part in order to prevent the shifting of this snapped-on ramp-forming part. 
     With a turn and tilt window, the ramp-forming part also is provided with at least one opening for a shiftable hinge pin which is coupled to the carrier piece, preferably by the intermediary of laths which are coupled to this carrier piece and to each other in the above-described manner. 
     With a turn and tilt window, usually at the corner connection above the carrier piece, a securing system is provided in order to prevent a shifting of this carrier piece when the window is tilted or turned open. 
     This securing system comprises a lever which is fixed in a hinging manner on an extremity of the fixed portion of the corner connection. 
     With known securing systems, this lever is attached on the fixed portion by a rivet, as a result of which construction and mounting are relatively difficult. 
     The invention also has as an aim to provide for such securing system which is simple in respect to construction and mounting. 
     To this aim, according to the invention, the fixed portion of the corner connection has at one extremity a head portion which, at the side directed towards the movable part, comprises an opening, whereas the lever, at the one side, has a pin which is provided in this opening and, at the other side, at a distance from the turning axis, has a locking pin which, for one position of the lever, becomes situated between locking pins on the movable part of the corner connection, when the wing is open, however, which is situated outside of the path of these locking pins when the wing is closed, and whereby the pin is surrounded by a spring which pushes the lever towards the above-mentioned position. 
     The invention also relates to the parts, amongst others, the carrier piece, the laths and such, which are destined for forming part of a fitting according to any of the preceding forms of embodiment and which can be brought onto the market separately. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     With the intention of better showing the characteristics of the invention, hereafter, as an example without any limiting character, several preferred forms of embodiment of a fitting and of parts for such fitting according to the invention are described, with reference to the accompanying drawings, wherein: 
     FIG. 1 schematically represents the fitting according to the invention of a turn and tilt window, with the majority of the parts taken apart; 
     FIGS. 2 and 3 represent perspective views of the carrier piece and the extremities, to be coupled thereto, of laths from the fitting of FIG. 1, before and after coupling, respectively; 
     FIGS. 4 to  6  represent cross-sections according to the lines IV—IV, V—V and VI—VI in FIG. 2, with a part of a wing; 
     FIGS. 7 and 8 represent perspective views of the cooperating extremities of two laths of the fitting, viewed from the top, the bottom, respectively; 
     FIG. 9 represents a cross-section according to line IX—IX in FIG. 7, however, with a part of the wing; 
     FIGS. 10 and 11 represent perspective views, viewed from the bottom, the top, respectively, of the ends of a corner connection and a lath at the upper side of the wing which have to be coupled; 
     FIGS. 12 and 13 represent perspective views analogous to those of FIGS. 2 and 3, however, relating to another form of embodiment of the invention; 
     FIG. 14 represents a cross-section according to line XIV—XIV in FIG. 13 with a portion of the wing; 
     FIG. 15 represents a perspective view analogous to that of FIGS. 7 and 8 of a same coupling of two adjacent laths, however, relating to another form of embodiment;. 
     FIGS. 16 and 17 represent perspective views analogous to that of FIG. 15, however, relating to another forms of embodiment of the coupling; 
     FIG. 18 schematically represents a turning window with the parts of the fittings therefor; 
     FIGS. 19 and 20 schematically represent two embodiments of a sash window, with indication of the parts of the fittings; 
     FIG. 21 schematically represents a projecting window with indication of the parts of the fitting according to the invention; 
     FIG. 22 schematically represents a pivot-hung window, also with indication of the parts of the fitting; 
     FIGS. 23 and 24 represent perspective views of the ramp-forming block of the aforementioned fitting, viewed from the top, the bottom, respectively; 
     FIGS. 25 to  27  represent cross-sections according to lines XXV—XXV, XXVI—XXVI and XXVII—XXVII in FIG. 23, however, with a portion of the fixed frame; 
     FIGS. 28 and 29 represent perspective views of a securing system with the elements thereof in disengaged condition; 
     FIGS. 30 and 31 represent a view perpendicular to the edge of the wing on the securing system of FIGS. 28 and 29, in locked and unlocked condition, respectively. 
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
     The fitting for a turn and tilt window consisting of a fixed frame  1  and a wing  2 , which schematically is represented in FIG. 1 (without the frame  1  and the wing  2 ), substantially comprises a number of parts, to wit, a carrier piece  3  which is shiftably attached to an upstanding edge of the wing  2 , a corner connection  4  situated thereabove with a movable part  5  which is pliable and can be displaced in a fixed gutter-shaped part  6  which forms a corner of 90° and is fixed on the wing  2 , a scissors mechanism  7  which is provided at the top of the window, between the frame  1  and the wing  2 , more particularly a part of the upper hinge  8 , and a hinge pin  9  which is provided below the carrier piece  3 , at the bottom, on a lath  10  and which, in tilting position of the wing  2 , penetrates into an opening  11  of a ramp-forming part  12  which is fixed on the lower horizontal part of the fixed frame  1 . 
     The aforementioned parts are connected to each other by means of laths  13  or  14  which can be shifted in fitting grooves  15  which are provided on the profiles of the wing  2  and, as represented in the cross-sections of, amongst others, FIGS. 4 to  6 , are formed by two parallel ribs  16  which are bent towards each other with their outermost edges, such that grooves  16 A are formed between these edges and the remainder of the profiled stile. These fitting grooves  15  extend over the entire length of the edges of the wing  2 . 
     The laths  13  are adjustment laths and the laths  14  are connection laths. They are of a different type, as will be described in the following, with different lengths in each type. Depending on the type, the ends are different, however, between the ends the laths are having the same cross-section, which is equal to a reversed T. At opposite sides, the head sits in the grooves  16 A, whereas the stem of the T is situated between the edges of the ribs  16  directed towards each other. 
     At least at a number of the laths  13  and  14 , pins  17  are provided which can engage behind locking parts  17 A which are attached to the fixed frame  1 . 
     In the represented example, also at the underside and the side of the hinges  8  of the window closing points are present, such that the fitting also has laths  14  with pins  17  at said sides, a corner connection  18  next to the hinge pin  9 , and a corner connection  19  next to the upper hinge  8 . The lower hinge  8  is of a type known in itself, whereby a rotation around a vertical as well as around a horizontal axis is possible. 
     As represented in detail in FIGS. 2 to  6 , the carrier piece  3  is a small elongated block which, with each of its extremities, is connected to a lath  13 , in a manner which allows an adjustment in longitudinal direction, as long as the carrier piece  3  is not provided on the profiled stile of the wing  2 . 
     This carrier piece  3  has two recesses  20  in its center which give out to the side of the two laths  13  connected thereto and in the side wall of the carrier piece  3  standing thereupon and which serve for receiving the two legs of the fork of the handle, not represented in the figures, for operating the fitting. 
     The two laths  13  have an extremity where the uppermost part, this is the part directed away from the bottom of the fitting groove  15 , is cut away over approximately 7 centimeters and is replaced by a middlemost rib  21  which is provided with a toothed part  22  in the shape of corrugations distributed at regular interspaces, which extend over the exterior side and the longitudinal sides of the rib  21 . On the last two centimeters, the lath  13  is narrowed in transverse direction, too. 
     The toothed part  22  has a length larger than 5 cm, preferably larger than 6 cm, and which in the example is approximately seven centimeters. 
     Between the recesses  20  and up to a distance from each end, the carrier piece  3  at opposite sides has a springy leg  23 , the edge of which shows a laterally protruding small edge which, when the carrier piece  3  is snapped into the fitting groove  15 , engages under the bent edges of the two ribs  16 , on the extremities on top of the lower part of an extremity of a lath  13 . 
     Over a distance of approximately seven centimeters, each extremity of the carrier piece  3  is provided with a recess  24 , which fits over the rib  21  and which is provided with a toothed part  25  which is complementary to the toothed part  22  of a lath  13 . The toothed part  25  also consists of corrugations which extend at regular mutual interspaces over the bottom and the side walls of the recess  24 , and the overall length of the toothed part  25  ,is larger than 5 cm, preferably larger than 6 cm, and in the represented example is approximately seven centimeters. 
     When the carrier piece  3  is snapped with its legs  23  into a fitting groove  15 , the toothed part  25  on each extremity engages into a toothed part  22  of a extremity of a lath  13  situated below, and this lath  13  is firmly connected to the carrier piece  3 . The toothed parts  22  and  25  overlap each other to a major or minor, extent, depending whether the lath  13 , when snapping on the carrier piece  3 , is situated further or less far underneath the carrier piece  3 , such that an adjustment in longitudinal direction of approximately five centimeters at each extremity is possible. 
     The opposed extremity of each lath  3  which is not provided with a toothed part  22 , also is provided with a toothed part  26  which, however, is different and considerably shorter. 
     As represented in FIGS. 7 to  9 , this toothed part  26  is exclusively provided in longitudinal edges of the extremity which, in width direction, is narrower and, starting from the bottom of the fitting groove  15 , is less high. The teeth of the toothed part  26 , however, protrude laterally as well as upward. 
     This toothed part  26  cooperates with a complementary toothed part  27  on an extremity of a connection lath, this is a lath  14 . This complementary toothed part  27  is provided at the inner side of a somewhat thickened extremity  28 , which is hollow at its underside, in the two lateral edges  29  thereof. 
     The toothed parts  26  and  27 , which are considerably shorter than the toothed parts  22  and  25 , do not serve for adjusting the length of the whole of laths along an edge, and during coupling, these toothed parts  26  and  27  overlap each other entirely. 
     The toothed parts  26  and  27  are engaged into each other before both laths  13  and  14  are slid into the fitting groove  15 . Once slid therein, the toothed parts  26  and  27  form a solid coupling of a lath  13  with a lath  14 . 
     The other extremity of the lath  14  comprises an extremity which has a shape similar to the extremity of the lath  13  with the toothed part  26  and which, thus, also comprises a toothed part  26 . 
     Also the lower end of the movable part  5  of the uppermost corner connection  4  has a rigid extremity along the upstanding edge of the wing  2 , which extremity is similar to an extremity  28  and, thus, has a toothed part  27  in which, thus, in a manner analogous to the one described in the aforegoing, a toothed part  26  of a lath  14  engages. 
     Between the lath  13  and said movable part  5 , instead of one, several laths  14  may be provided successively, as well as the lath  13  with its toothed part  26  may engage directly into the toothed part  27  of this part. 
     As represented in detail in FIGS. 10 and 11, the movable part  5  of the corner connection  4  comprises a second rigid extremity which is connected to said extremity by means of a band of spring steel and which is situated along the upper edge of the wing  2 . This latter extremity consists of a gutter-shaped part  30  which is provided with a toothed part  25  at its interior side which is identical to the toothed part  25  in the carrier piece  3 . 
     The toothed part  25  at said extremity of the part  5  engages into the toothed part  22  at one extremity of a lath  13  which is situated in the fitting groove  15  on the upper edge of the wing  2 . By the last-mentioned toothed parts  22  and  25 , the length of the fitting can be adjusted in the longitudinal direction of said edge by approximately five centimeters. 
     Said lath  13  engages with its toothed part  26  into the toothed part  27  of a lath  14 , whereas the toothed part  26  of the last-mentioned lath  14  itself engages into a toothed part  27  which is provided on a second lath  14  or on an extremity of a lath  31  guided in the fitting groove  15  which extends underneath the scissors mechanism  7 . This lath  31  is connected, by the intermediary of a lath  32 , to an extremity of the movable part  5 B of the corner connection  19 . 
     The lath  32  is provided with locking parts  33  for blocking the main lever  34  of the scissors mechanism  7  which is attached to a part of the uppermost hinge  8 . 
     The lath  32  has an extremity with a recess which engages on a block on the movable part  5 B. 
     Along the upstanding edge of the wing  2 , this movable part  5 B of the corner connection  19  is provided with a toothed part  27  at its extremity, with which toothed part it engages over a toothed part  26  of an additional lath  14  which extends along this upstanding edge, and thus is connected to the lath  14  by a coupling, such as represented in FIG.  9 . Several additional laths  14  are connected to each other by such mutually engaging toothed parts  26  and  27  along said edge. 
     Under the carrier piece  3 , the lath  13  coupled to this part at the bottom engages with its toothed part  26  into the toothed part  27  of a lath  14 . The toothed part  26  of this lath  14  in its turn engages into a toothed part  27  on the upper end of said lath  10  which is provided with a recess at the bottom and carries the hinge pin  9 . 
     Said recess engages over a block which is provided on the movable part  5 B of the corner connection  18  which is similar to the corner connection  19 . 
     Finally, the toothed part  27  of this part  5 B engages into the toothed part  26  of a lath  14  which can be shifted along the lower edge of the wing  2 . 
     The laths  13  and/or  14  can be made of aluminum as well as of synthetic material, for example, polyamide, which is reinforced by fibers, for example, glass fibers. Also, certain parts, such as the carrier piece  3 , the fixed part of the corner connections  4 ,  18  and  19  can be manufactured of such synthetic material. A suitable synthetic material consists of 66% polyamide en 30% glass fibers. 
     When the carrier piece  3  is pushed downward by the handle, the laths  13 ,  14 ,  10 ,  31  and  32  move and first the pins  17  are freed from the locking parts  17 A, as a result of which the wing  2  can swing open. 
     With a further movement, whereas the wing  2  still is closed, the hinge pin  9  penetrates into the recess  11  of the ramp-forming part  12 , and the cams  33  on the scissors mechanism  7  are set free, as a result of which the wing  2  can tilt. 
     When mounting the fitting on the wing  2 , two toothed parts  26  and  27  to be connected first are brought into each other before the lath  13  or  14  or any part is slid into the fitting groove  15 . 
     Finally, the carrier piece  3  is snapped into the vertical edge on the fitting groove  15 , such that its toothed parts  25  engage with a number of teeth into the toothed part  22  of the two laths  13 . 
     In FIGS. 12 to  17 , a burglary-delaying form of embodiment of the fitting is represented. 
     This form of embodiment substantially differs from the form of embodiment described in the aforegoing, amongst others, in that the carrier piece  3  is realized heavier and no longer is coupled to the laths  13  by means of a toothed part, but by means of punching screws  35  and also is not snapped into the fitting groove  15 , but slid therein. 
     As represented in detail in FIGS. 12 to  14 , the carrier piece  3  also is a block having two recesses  20 , however, the springy legs are replaced by an outwardly directed rib  36  at one side, which is interrupted by the recesses  20  and shiftably fits into the groove  16 A and a groove  37  at the other side, into which fits the bent edge of a rib  16  situated at this side. 
     Further, a punching screw  35  is screwed into each extremity of the carrier piece  3 , which, with its point, has punched a hole into a narrowed, but not provided with a toothed part, flat extremity  38  of a lath  13 . The lateral edges of this extremity  38  are beveled, and the carrier piece  3  is provided with a corresponding recess  39  at its underside, which underside is directed towards these extremities  38 . 
     The extremities  38  are relatively long, but the piece with a T-shaped cross-section of a lath  13  is extremely short, just sufficient for slidably retaining this lath  13  in a fitting groove  15 . 
     In this embodiment, the laths  13  are only slid with their extremity  38  underneath the extremities of the carrier piece  3  after this latter, too, has been slid into the fitting groove  15 . When the extremities  38  are situated at the desired location, the punching screws  35  are screwed tight, such that they punch a hole through the extremities  38  in which they remain as connection pins. Therefore, the mounting and also the manufacturing of the carrier piece  3  is simple. It offers an excellent protection of the fork of the handle against deformation by a screwdriver of a burglar. 
     Possibly, in this burglary-delaying form of embodiment all laths  13 ,  14  consist of aluminum, and the toothed parts  25 ,  26  and  27  can be made more solid. 
     So, especially the end of the laths  13  and  14 , provided with a toothed part  26 , can be more narrow, whereas the toothed part  26  only has teeth on the lateral edges, such as represented in FIG.  15 . The toothed part  27  cooperating with this toothed part  26  is unaltered in respect to the form of embodiment represented in FIGS. 7 and 8. 
     Still another embodiment of a coupling between a toothed part  26  and a toothed part  27  is represented in FIG.  16 . The toothed part  26  also only comprises teeth on the lateral edges. The hollowed extremity  28  with the toothed part  27  does not have to be thickened, as it was in the preceding forms of embodiment. 
     Still another embodiment of the coupling is represented in FIG.  17 . The toothed part  26  also only has teeth on the lateral edges, however, these are situated at a distance from the underside. The extremity  28  with the toothed part  27  also is not thickened and solely consists of the two lateral edges  29 . 
     Whereas in the aforegoing, only two types of laths  13  and  14  are described, it is obvious that other types are possible, too, such as laths having at both extremities an extremity  28  with a toothed part  27 , for example, laths with a pin  17  thereupon, and laths having a toothed part  26  at both extremities. It is substantial that each time a toothed part  26  and a toothed part  27  can mutually engage in order to form a coupling. 
     Also, laths may be present which have a toothed part at only one extremity, for example, laths which are situated at the extremity of a connection or form part of one or the other mechanism. 
     Certain types of laths can not comprise any pins  17 , whereas others, for example, may comprise more than one pin  17 . 
     It is clear that the carrier pieces  3  and laths  13  and  14  described heretofore also can be applied with other windows than turn and tilt windows, whereby these parts can be mounted on the wing as well as on the fixed window. Parts, such as the scissors mechanism  7  or the hinge pin  9 , are not present. 
     If these parts only extend along an edge, then a precise length adjustment may not be necessary, however, the parts described in the aforegoing allow for a simple, fast and inexpensive mounting, without sawing or previous boring or punching. 
     With such other windows, also corner connections  4  and/or  18  and/of  19  may be used. 
     In FIG. 18, very schematically a turning window is represented, whereby the parts of the fitting are indicated with the same reference ciphers as in the preceding figures. 
     In FIGS. 19 and 20, in an analogous manner, two embodiments of a top-hung window are represented. 
     In FIG. 21, also in an analogous manner, schematically a projecting window is represented. The wing  2  is attached at the fixed frame  1  at the top at opposite sides, by means of a scissors mechanism  7 . 
     In FIG. 22, in an analogous manner a pivot-hung window is represented, whereby the wing  2  at opposite sides, at half of its height, is hinging around a horizontal axis in respect to the fixed frame  1 . 
     In some of these windows, such as with the turn and tilt window described in the aforegoing, the fitting also may comprise ramp-forming parts  12 , possibly without recesses  11  or with a recess  11  which is not used. 
     With any type of window where a ramp-forming part  12  is attached to the fixed frame  1 , in a particular form of embodiment of the invention this ramp-forming part  12  can be snapped into a fitting groove  40  on the edge of the fixed frame  1 . This ramp-forming part  12  preferably is manufactured of synthetic material, for example, polyamide, possibly reinforced by fibers, such as glass fibers. 
     As represented in detail in FIGS. 23 to  27 , this ramp-forming part  12  comprises an elongated block which, at one longitudinal side, is provided with a groove  41 , whereas at the opposed side, it comprises a springy leg  42  having an outwardly directed edge  42 A. 
     As represented in detail in FIGS. 26 and 27, the ramp-forming part  12  is slid with its groove  41  over the bent edge of one of the ribs  43  limiting the fitting groove  40 , whereas the edge  42 A of the leg  42 , by springy deformation of this latter, is snapped under the bent edge of the other rib  43  and engages. 
     At the top, at the side of the leg  42 , this is also the side along which the wing  2  swings open, the ramp-forming part  12  is provided with an ramp-like plane or bevel  44 . 
     When closing the wing  2 , this bevel cooperates with the fixed part  6  of the corner connection  18  in order to place the wing  2  in closed condition into the right position in respect to the fixed frame  1  in order to be able to realize a good closure. 
     If no corner connection  18  is present, on the wing  2  a complementary ramp-forming part can be snapped into the fitting groove  15  in a similar manner. 
     The ramp-forming part  12  is provided against the upstanding edge of the fixed frame  1 , and in order to prevent that it might shift in its longitudinal direction over the horizontal edge of the frame  1 , it is retained at its place by a locking part  45  which is attached to the first-mentioned upstanding edge and with which cams standing on the lath  10  cooperate. With its lower extremity, the locking part  45  sits in an opening  46  at an extremity of the ramp-forming part  12 , such as represented in detail in FIG.  23 . 
     For enabling its use with wings  2  turning to the right as well as such turning to the left, the ramp-forming part  12  is symmetrical and has such an opening  46  in its upper side at each extremity. 
     Therebetween, the ramp-forming part is provided with two recesses  11 . When the carrier piece  3  is placed into tilting position, the hinge pin  9  penetrates into one of these recesses  11  and hinges in this recess  11  during tilting. 
     With a turn and tilt window, at the fixed part  6  of the corner connection  4 , a securing system is provided which prevents that, when the wing  2  is not closed, the system of laths  10 ,  13 ,  14 ,  31  and  32  is displaced by the carrier piece  3 . 
     To this aim, the leg, of the fixed part  6  which extends along the upstanding edge of the wing  2  comprises a protruding head part  47  which extends at the exterior side at a distance from the rigid extremity  48  of the movable part  4 , which extremity is attached to a band  5 A made of spring steel. This movable part  5  is represented in FIGS. 30 and 31 only. 
     At the side of the extremity  48 , at the head part  47  a more or less triangular lever  49  is provided in a pivotable manner. To this aim, this lever  49  is provided with a pin  50  at one side which sits turnably in an opening  51  in the head part  47 . The lever  49  is seated between the head part  47  and the rigid extremity  48  of the movable part  5 . 
     The pin  50  is surrounded by a countersunk spring  52 , the legs of which extend at opposite sides of a part  49 A of the lever  49  and are situated with their extremities at opposite sides of parts  47 A of the head part  47 , in such a manner that the spring  52  pushes the lever  49  always towards the position wherein the point of the lever  49  is directed downward. In FIG. 30, the lever  49  is represented in this position. 
     At the side of the lever  49  directed towards the extremity  48 , at a distance from the turning axis formed by the pin  50 , there is a locking pin  53 . 
     As represented in FIGS. 30 and 31, the extremity  48  of the movable part  5  is provided with locking pins  54 ,  55  and  60  situated at a small distance from each other, which pins are directed towards the lever  49  and, for said position, represented in FIG. 30, of this lever  49 , are situated above, below, respectively, the locking pin  53 . 
     Under the influence of the spring  52 , the lever  49  automatically takes the aforementioned position when the wing  2  is turned or tilted open. In that the locking pin  53  is situated between the locking pins  54  and  55 , the extremity  48  only can be shifted over a distance of approximately 3 mm. 
     When the wing  2  is turned or tilted closed, the extremity of the lever  49  comes into contact with a stop which is attached to the fixed frame  1 , as a result of which it is turned. In closed condition of the wing  2 , the lever  49  is in the position represented in FIG. 31, whereby the locking pin  53  is outside of the path of the locking pins  54  and  55 , such that the extremity  48  can be shifted. 
     As the pin  50  is provided on the lever  49 , the mounting of the securing system is rather simple. 
     First, the spring  52  is put into the lever  49 , after which the lever  49  with the spring  52  is placed against the head part  47 , whereby the pin  50  penetrates into the opening  51 . Finally, the movable part  5  is slid into the fixed part  6 . 
     The invention is in no way limited to the forms of embodiment described in the aforegoing and represented in the figures, on the contrary may such fitting and such parts for such fitting be realized in different variants, without leaving the scope of the invention.