GB2169636A - Window - Google Patents

Abstract

A window operating mechanism for tilt-turn windows comprises a rod linkage (5) arranged to be displaceable into positions corresponding to various window positions, and a safety device for blocking displacement of the rod linkage. The safety device comprises a detent (9) on the rod linkage (5) and a safety lever (10) mounted to be resiliently supported on the frame of the window light (1) and movable into engagement with the detent (9), to prevent the rod linkage (5) from being moved unintentionally. <IMAGE>

Description

SPECIFICATION Window light operating mechanism for swing-tilt windows or the like This invention relates to a window light operating mechanism for swing-tilt windows or the like, comprising connecting link means arranged to be displaceable into registration positions corresponding to window light closed, window light tilted open and window light swung open by actuating means mounted on the frame of the window light, and check means arranged to be able to block displacement of the connecting link means, the check means comprising a detent provided on the connecting link means and a check lever mounted so as to be supported resiliently on the frame of the window light and arranged to be movable into engagement with the detent.

In known window light operating mechanisms of this type, as shown for example in DE-GM 1727517, the check means serves as a protection against operational error, wherein the check lever mounted on a sheathing rail or on the frame of the window light is able to block the connecting link means against displacement into their tilt registration position as well as their swing registration position, while the check lever which is pivotably movable about an axis extending perpendicular to the plane of the window light can be engaged by a biassing check spring in latching recesses which are provided in the connecting link means at appropriately spaced intervals from one another.If, therefore, the window light is moved back into its closed position, then the end of the latching lever which projects opposite to its latching end engages against the opaque surrounding frame, whereby the check lever is pivoted into its derestriction position and freeing the connecting link means for movement.

As against this, with the window light operating mechanism of the present invention it is the aim to achieve a different object. Swingtilt windows are for the most part used in the manner that one normally keeps the window light either in the tilted open position or alternatively in the closed position, whereas use is very seldom made of the facility for swing opening of the window light and then often only for cleaning purposes. Thus, in most situations where these window lights are used, there is the need or the wish normally to be able to prevent the swing opening of the swing-tilt window light, and then only to permit authorised persons to be able to open them in this way.This is particularly desirable in schools, children's rooms or similar areas, in order to prevent unauthorised swing opening of the window light by children, because of the dangers associated therewith, for example the danger of them falling out.

It is an object of the present invention to provide a window light operating mechanism of the type first referred to above, wherein the check means permits the usual tilt opening and closing of the window light without hindrance, but normally prevents the swing opening of the window light and permits this only in special cases and then by persons authorised so to do.

This object is achieved in accordance with the invention by the fact that the detent and the check lever are able to prevent the displacement of the connecting link means into the swing registration position and only permit this after manual actuation of the check lever.

For this purpose the detent and the check lever are preferably positioned above the actuating transmission means. With the mechanism of the present invention one ensures that the swing-tilt window light normally moves only in the tilt opening and closing sense and can be brought into its swing opening position only by a positive action and only after appropriate manual operation of the comparatively inaccessible check lever. If, in the closed position of the window light, the check lever lies in an inaccessible position between the window light and the surrounding frame, then when the window light is tilted open sufficiently by hand the check lever can be brought into its derestriction position in order to be able to displace the connecting link means into its swing registration position and consequently in order to be able to swing open the window light.

With the window light operating mechanisms in which the connecting link means is to be brought into a ventilation registration position lying between its swing registration position and its central, tilt registration position, and where the check lever is mounted above a sheathing rail which masks the connecting link means, the detent and the check lever are preferably so arranged that the detent, in the ventilation registration position of the connecting link means, just rests against or contacts the blocking check lever. This has the advantage that, consequently, the ventilation registration position of the connecting link means can also be determined unequivocally, whereby a corresponding simplification of the coupling means which is between the window light and the surrounding frame and which brings about the ventilation-tilt position of the window light is possible.

According to a further preferred feature of the invention, the detent preferably comprises a latch pin which is secured to the connecting link means and which extends through a slot provided in the sheathing rail, while the check lever is formed as a double-armed pivot lever supported resiliently on a retaining pin and mounted for limited longitudinal displacement on the sheathing rail, with the check lever having its latching end which lies opposite to the actuating end projecting into that displace ment path of the latch pin which leads towards the swing registration position.

In order to ensure a reliable operating engagement between check lever and latch pin in the ventilation registration position, the latch pin preferably comprises a collar lying tightly against the sheathing rail, as well as a guide neck extending beyond the collar, with the check lever at its latching end being cranked in in the direction towards the sheathing rail and having a forked end defining a slot of a width corresponding to the neck of the latch pin, the slot having at its entry end an enlarged section of a width corresponding to that of the latch pin collar.

Thereby, the entry of the latch pin into the fork slot of the check lever is made more favourable, and additionally the holding of the check lever by the retaining pin is simplified.

For this it is sufficient if the check lever is pushed on to the retaining pin through a slot in the lever in the manner of a bayonet fitting, and is held by a spring, especially a conical compression spring arranged on the retaining pin, in a flat checking position against the tommy-bar type head of the retaining pin.

It is also advantageous if the detent on the connecting link means and the check lever on the sheathing rail are positioned at the corner traverse region of the window light operating mechanism. This ensures that the check lever is made as inaccessible as possible for small people, especially children, but on the other hand the check lever is also so arranged that it can be actuated by hand even when the window light is only tilted open very slightly, namely when the window light is in the ventilation position in particular.

A preferred embodiment of window light operating mechanism in accordance with the invention will now be described by way of example and with reference to the accompanying drawings, which show both partial face views and partial side views of the mechanism in its different operating modes.

In the drawings: Figures 1 and 2 show the mechanism in the tilt registration position; Figures 3 and 4 show the mechanism in the ventilation registration position; and, Figures 5 and 6 show the mechanism in the swing registration position.

On each sheet of drawings, below the respective Figures, there is shown a symbolic illustration of the window-operating hand-grip.

The window light 1 of a swing-tilt window, comprising glass within a window light frame, as shown by the chain-dotted lines, is in the conventional manner connected to a surrounding frame 2, likewise indicated by chain-dotted lines, by means of a lower jamb bearing, a front pivot bearing and an upper scissors adjustment mechanism. The connection between window light 1 and frame 2 is such that one can selectively tilt the window light about a horizontal axis, swing it about a vertical axis, and also close it. For this purpose appropriate closing and coupling means are provided which can be correspondingly moved or adjusted by transmission means which include a hand-grip 3 but which are not shown in more detail and also by a connecting rod 5 which can thereby be adjusted, i.e. by movement of the hand-grip 3, lengthwise in the direction of arrow 4.The connecting rod 5 is mounted in a corresponding longitudinal groove in the window light frame 1 and is closed off on the outside by an attached sheathing rail 6. At the upper corners of the window light there are provided suitable corner traverse means; the vertical connecting rod 5 is connected to a second connecting rod 5' extending along the upper margin of the window light by means of a flexible connecting strip 8 which is guided to be longitudinally displaceable in a corner guide 7. By means of the aforesaid actuating mechanism the connecting rods 5,5' can be brought to a total of four different registration positions, namely the closed registration position which is not illustrated, the central, tilt registration position shown in Figs. 1 and 2, the ventilation registration position shown in Figs. 3 and 4, and finally the swing registration position shown in Figs. 5 and 6.In the ventilation registration position shown in Figs.

3 and 4 a stop pin 5" which is provided on the upper connecting rod 5' is in alignment behind a ventilation striker plate 2' which is provided on the fixed outer frame 2, so that then the window light 1 can only be opened through a small tilt angle.

In order to prevent the connecting rods 5,5' from being displaced from one of the illustrated air-flow registration settings into the swing registration position shown in Figs. 5 and 6 inadvertently, an appropriately formed check mechanism is provided which comprises a check detent in the form of a latch pin 9 located on the vertical connecting rod 5 and a check lever 10 which is mounted on the sheathing rail 6 and which cooperates with the latch pin 9. The latch pin 9 also forms the connection between the vertical connecting rod 5 and the connecting strip 8. The latch pin 9 is provided with a circular cross-section abutment collar 9', a guide neck 9" and a head 9"', and extends through a suitably long slot 6' in the sheathing rail 6. The collar 9' of the latch pin 9 lies flat against the surface of the rail 6 so that the pin can slide up and down along the slot.

The check lever 10 which cooperates with the latch pin 9 is formed as a double-armed lever. The lever has a longitudinal slot 10V therein, and, by means of this longitudinal slot, is fitted on to a retaining pin 11 in the manner of a bayonet connection with limited longitudinal displacement. The retaining pin 11 is fixed to the sheathing rail 6 and is provided with a suitable tommy-bar head 11'. The lever is normally held on pin 11 by an intermediate disc 13, which is subject to the action of a conical compression spring 12, in its checking position as shown in Fig. 1 where it lies flat against the head 11' of the retaining pin.At its latching end 10", which is opposite to its actuating end 10', the check lever 10 is stepped inwards towards the sheathing rail 6 and here is provided, as shown most clearly in Fig. 2, with a forked end defining a slot 10"' which corresponds in terms of its width with the guide neck 9" provided on the latch pin 9 and which has at its entry end a suitably rounded enlargement 10lav, against which the circular cross-section abutment collar 9' provided on the latch pin 9 rests in the ventilation registration position shown in Figs.

3 and 4, with the check lever 10 located in the check position.

As shown in Figs. 1 to 4, the connecting rods 5 and 5' can be brought selectively, by means of the actuating transmission mechanism, into the tilt, the ventilation and also the closed registration positions or settings, and consequently the window light 1 can be moved selectively into its corresponding positions in relation to the surrounding frame 2.

Since the latch pin 9, in the ventilation registration position shown in Figs. 3 and 4, has its abutment collar 9' lying within the enlargement 10sV of the entry slot 10"' provided in the check lever, it is essential, in order to be able to move the connecting rods into the swing registration position shown in Figs. 5 and 6, for the upper end of the check lever 10 first to be raised by depressing its actuating end 10', with the result that its latching end 10" comes away from the abutment collar 9' of the latch pin 9, so that then the latch pin 9 with its collar 9' can move further down into the check lever end 10", into the swing registration position shown in Figs. 5 and 6, by corresponding actuation of the hand-grip 3.

In order to be able to maintain the check lever 10 in its derestriction position, without thereby simultaneously having to change over the actuating transmission mechanism into the swing registration position, the check lever 10, for release of the check stop and latch pin 9 with the window light tilted open, is not just simply depressed at its actuating end 10', but additionally is displaced slightly in the direction towards the latch pin 9, so that the latching end 10" of the check lever can sit on the abutment collar 9' on the latch pin 9, so that the check lever then, without having to be held depressed any more by hand, by subsequent movement of the actuating drive transmission, is appropriately simply entrained to the swing registration position by the latch pin 9, namely is brought into the position shown in Figs. 5 and 6.From here, the check lever can then be returned automatically into its checking initial position shown in Figs. 1 to 4 by the subsequent tilting or closure movement of the actuating transmission. The limited lengthwise displacement of the check lever 10 in relation to its retaining pin 11 thus ensures that one can carry out single-handed operation upon changeover of the actuating transmission to swing opening.

It should be understood that the checking mechanism which is provided as part of the window light operating mechanism could advantageously be used with a different sequence of connecting rods. It is only necessary that the closure and tilt-opening registration positions as well as perhaps also the ventilation registration position of the connecting rods can always be achieved without hindrance, which is always the case if the swing registration position of the connecting rods lies outside the remaining registration positions, i.e. does not need to be carried out with changeover from tilt to closure and vice versa.

Claims (7)

1. A window light operating mechanism for swing-tilt windows or the like, comprising connecting link means arranged to be displaceable into registration positions corresponding to window light closed, window light tilted open and window light swung open, by actuating means mounted on the frame of the window light, and check means arranged to be able to block displacement of the connecting link means, the check means comprising a detent provided on the connecting link means and a check lever mounted so as to be supported resiliently on the frame of the window light and arranged to be movable into engagement with the detent, wherein the detent and the check lever are able to prevent the displacement of the connecting link means into the swing registration position and only permit such displacement after manual actuation of the check lever.

2. A window light operating mechanism as claimed in claim 1, wherein the connecting link means can be moved to a ventilation registration position lying between its swing registration position and its central, tilt registration position, wherein the check lever is mounted above a sheathing rail which masks the connecting link means, and wherein the detent, in the ventilation registration position of the connecting link means, lies against the blocking check lever.

3. A window light operating mechanism as claimed in claim 2, wherein the detent comprises a latch pin which is secured to the connecting link means and which extends through a slot provided in the sheathing rail, and wherein the check lever comprises a double-armed pivot lever supported resiliently on a retaining pin and mounted for limited longitudinal displacement on the sheathing rail, with the check lever having its latching end which lies opposite to the actuating end projecting into that displacement path of the latch pin which leads towards the swing registration position.

4. A window light operating mechanism as claimed in claim 3, wherein the latch pin comprises a collar lying tightly against the sheathing rail, and a guide neck extending beyond the collar, and the check lever at its latching end is cranked in in the direction towards the sheathing rail and has a forked end which defines a slot of a width corresponding to the neck of the latch pin, said slot having at its entry end an enlarged section of a width corresponding to that of the latch pin collar.

5. A window light operating mechanism as claimed in claim 3 or 4, wherein a conical compression spring is provided on the retaining pin, said spring is seated at one end against the sheathing rail and at the other end against an intermediate plate carried on the retaining pin, the intermediate plate rests against the check lever, the check lever is fitted on to the retaining pin through a slot in the lever in the manner of a bayonet fitting, and the spring biasses the intermediate plate and check lever towards a position in which the check lever is in its checking position lying flat against a tommy-bar head of the retaining pin.

6. A window light operating mechanism as claimed in any preceding claim, in which the detent on the connecting link means and the check lever are positioned at the corner traverse region of the operating mechanism.

7. A window light operating mechanism substantially as hereinbefore described with reference to the accompanying drawings.