High-level tiltable windows, in particular of the type comprising an operating and locking device at the top portion of the window sash may be difficult to oper¬ ate, i.e. to open and close, from floor level so that their operation frequently requires mechanical aids with penumatic or electrical actuators that may be rather expensive as regards production and installation.

Operation by cord in various designs are known from other types of windows. From windows having a cen- tral post and laterally hinged sashes it is for instance known to spring-bias a sash in the opening direction and to secure it in the closing position by means of a spring-biased locking hook mounted on the central post and which can be released by pulling at a first cord hanging down along the central post while a second cord is passed over a pulley on the same post and secured to the sash close to the edge thereof opposite the hinge side, so that said second cord may be used for closing the window by overcoming the spring bias force (or when securely tied to a bracket on the post) for keeping the sash in an appropriate open position.

With inspiration from the above mentioned prior art, a tiltable window, in particular a window for in¬ stallation in an inclined roof and with a latch mounted at the top portion of the window sash, might be provided with a pull cord to release the latch and to compulsori- ly open the window against the force of a closing spring acting on the sash, but such a solution to the problem of operating cannot be considered practicable as the spring then had to be very strong in order to effect the required closing force.

According to the invention such a tiltable window is provided having a simple and safely operating cord arrangement which, moreover, does not require extra measures in the form of bias springs or other corapli- cated means. The arrangement may as well be applicable to windows having a bottom-hinged, inwardly extending sash which in this respect is analogous with the upper half of a tiltable sash.

More particuarly, the invention relates to a cord operated window, in particular for installation in an inclined roof, comprising a sash whose top portion moves inwardly from the main frame when opening the window and which at its top is provided with a latch for releasably securing the sash to the main frame in the closing posi- tion of the window, and according to the invention the latch of this window is connected with a first depending operating cord adapted to cause the latch to be released upon a downward pull, thereby causing the window sash to be pivoted in its opening direction and which is passed through a travelling ring or a similar guide member con¬ nected with a second, depending operating cord passing first from said guide member through an eye positioned on the window sash at its one side and preferably close to its upper edge, said eye having a lumen smaller than the external dimensions of the guide member, and passing then over a pulley or a similar guide secured in rela¬ tion to the window frame and approximately at the level of the eye on the sash when closed.

In the closed position of the window the second operating cord may be pulled so that the guide member abuts against the eye. The first cord will then be hanging down laterally of the window and may together with the second cord be secured to a holder at the win¬ dow, so that none of the cords will impede the view through the window or hamper persons staying therebe-

neath. When it is desired to open the window, both cords are released from the holder, and a downward pull at the first cord causes it first to be straightened out, the guide member being drawn away from the eye, then re- leases the lock and opens the window, thereby generally easily overcoming by a certain strong pull the possible frictional forces resisting the movement of the sash. When the sash has been brought into the desired position the guide member may again be brought into abutment against the eye by a pull at the second cord, and both of the down-hanging cords may again be caused to follow the side of the window.

A sufficient pull at the second cord is effected for closing the window after the first cord has been released from the holder. This pull will over the guide member and the eye be transferred to the window sash which is thereby swung back for closing.

If the mentioned pulley or the corresponding guide is located at some distance inwards from the inte- rior side of the sash when closed, the further advantage is achieved that the sash may be safely secured by the second cord in a slightly open positon of ventilation. In return, the sash on closing has to pass said position with sufficient inertia in order to abut against the main frame.

Said two operating cords may appropriately be constituted by an integral piece of cord connected at its ends with the latch and the guide member, respec¬ tively. This makes it easier to use the cord system, and the arrangement is particularly advantageous when the sash of a tiltble window shall be able to be swung 180° or more, since in that case an additional length of the said second cord is not required.

The invention is illustrated by an embodiment on the drawing which in a perspective view from the inner

side shows the upper, right corner of a tiltable window installed in a roof, not shown, with steep inclination.

The window as such may be quite ordinary with a tilting sash 1 which by hinges, ^■ not shown, is mounted in a main frame 2 with internal side casings 3 and which at its top sash portion 4 is provided with a bracket 5 that may serve as a handle and comprises a non-visible latch, for instance having a spring-biased hook for engagement with a striking plate at the top portion of the main frame.

A first operating cord 6 is at its one end con¬ nected so with the latch 5 that a downward pull at the cord may cause the latch to be released. The cord 6 is from the bracket passed through a smooth ring 7 acting as a guide member and from which the cord may be hanging down unimpededly. A ball 8 prevents the cord from slip¬ ping through the ring. This is tied to a second oper¬ ating cord 9 passing from the ring first through an eye 10 provided in the window sash 1 close to its corner and continuing then over a pulley 11 accommodated in a bracket 12 on the frame 2 or the side casing 3 thereof. This cord too may, as shown, terminate into a ball 13 but, as mentioned above, said two cords 6 and 9 may also constitute parts of a continuing piece of cord. In this latter case said two balls may be avoided. Laterally of the window there should further be mounted a holder to which the down-hanging cords may be tied or secured in any other way.

The use of said cord drive is explained in the foregoing and does not need to be repeated here. It should only be stated that the mentioned position of ventilation is determined by the fact that the eye 10 then is at its shortest distance from the pulley 11.