This invention relates to a window particularly designed to be mounted in an inclined roof and com¬ prising, in a known manner, cf. the published Danish patent application No 1831/82 and WO 82/00842, a main frame and an element that may be opened in relation thereto and includes an intermediate frame which is hinged to the main frame at the top thereof and is permanently urged in its opening direction, and a pane supporting sash which in the area of its horizontal centre axis is pivotally mounted in the intermediate frame, said element and main frame being provided, at least in one side of the window, with associate arresting means.

In the known windows of this type the arresting means of the openable element are mounted on the sash in the vicinity of its pivot axis and are adapted, by the opening and closing movement of the window which is effectuated ₍ by a coordinated swinging of the sash in relation to the intermediate frame and of the latter in relation to the main frame, to engage and disengage the corresponding arresting means of the main frame.

After the engagement has been established, the sash and the intermediate frame may be locked together at their upper edges, and the sash of the window will then be kept in a closed or- a slightly open position.

Thus, the manual operating means may be reduced to only one locking or connecting device, namely between the sash and the intermediate frame.

When such a window is to be opened, the sash must first be released from the intermediate frame and then swung clear of the arresting means of the main frame.

After this the sash may again be locked together with

_... OMPI

the intermediate frame which has also been swung open, - and may function together with this intermediate frame as a top-hinged window sash, or the sash may remain released from the intermediate frame and then function as a pivoted or tilting sash journalled in the outswung intermediate frame.

A purpose of the invention is to provide a window of the above-mentioned type and which satisfies better than the known embodiments the requirements to an emergency exit window.

This is achieved by the invention in that the arresting means of the openable element are mounted on the intermediate frame, and in that the associate arresting means are releaseable by means of an internal release handle.

By the normal operation (opening and closing) of this window the associate arresting means remain engaged so that the intermediate frame acts as an integral part of the main frame. In this situation the sash can therefore be considered journalled in the main frame. Only if the window shall exceptionally serve as an emergency exit, the release handle is used to disengage the arrest, and the permanent urging of the intermediate frame will then cause the entire openable element, that is the intermediate frame and the sash in-_ unison, to be swung ^' outwardly and upwardly, and by using an appropriately designed hinge between the main frame and the intermediate frame and appropriately dimensioned and located urging ^' means, such as gas pressure springs, such an extensive swinging up of the openable element can be assured that the latter will not obstruct an escape through the aperture defined by the main frame.

An embodiment of the window according to the in- vention is illustrated schematically on the drawing

OMPI

which represents a sectional elevation of the window showing the intermediate frame in an outswung position and, for the sake of clarity, the sash released from the intermediate frame. The main frame 1 shown on the drawing is connected through a hinge 17 at its top with an intermediate frame 3 which is permanently urged in its opening direction, for instance by a couple of gas pressure springs or springloaded articulated links 4 which at the ends are pivotally connected with .the side members of the main frame and the intermediate frame. A tiltable sash 7 with one or more panes 8 is mounted in the intermediate frame 3, the tilting axis being indicated by 2. Close to this tilting axis the inter- mediate frame 3 is provided with an arresting means formed by a pin 5 by which the intermediate frame 3 and the main frame 1 may be coupled together when the intermediate frame is swung into abutment against the latter, the pin 5 then being held firmly by an associate arresting means formed by a catch 6 which is pivotal in the main frame 1. Through a wire 10 this catch, together with a possible similar catch in the other side of the window, is connected with a release handle 9 which may be countersunk in the top member of the main frame ^• 1 and may be sealed, if desired. A pull at this handle 9 will release the catches 6 from the pins 5, and the urging means 4 acting on the inter¬ mediate frame 3 will then cause an outswinging of the latter through an angle of e.g. 70 degrees, although the drawing shows a much smaller angle.

In the normal, arrested position of the intermediate frame 3 the sash can be operated as an ordinary pivot sash, for instance by using a handle 18 mounted at the top of the sash and which is connected with a coupling device which at this place permits a release-

OMPI - WiP

able locking of the sash with the intermediate frame.. If desired, an operation of the handle 18 may also be effectuated after the arresting of the main frame 1 and the intermediate frame 3 has been released.

OMPI