Abstract: The invention concerns a window assembly in which the sash is mounted in the window frame for opening inwardly about hinges at the lower end of the sash and is supported in partially and fully open positions by telescopic stays extending between the top of the frame and pivots at the midpoints of the sides of the sash, the hinges being slidable in upright guides on the frame stiles so that when the stays are fully extended the sash can be tilted about the midpoint pivots with simultaneous sliding movement of the hinges up the guides to reverse the sash with the outside of the glass pane facing inwardly for easy cleaning.

Abstract: A ventilator comprises upper and lower bars spaced apart by spacer members to provide a ventilation aperture, and a pair of flaps hinged to respective ones of said upper and lower bars by operating means which when operated in one direction causes the flaps to close the opposite sides of said ventilation aperture and when operated in the opposite direction causes the flaps to open the respective opposite sides of the said aperture.

Abstract: A hinge for use in a horizontally pivoted window assembly comprises a pivot member cooperable with an eye member and means responsive to the weight of a window acting on either of said members to increase the friction therebetween after an initial opening movement of the hinge.

Abstract: A window assembly comprises a window sash having a pair of secondary stiles which are hinged to a surrounding frame and at one of their ends to opposite sides respectively of the sash, and operating and locking mechanism including an operating member having three operating conditions whereby in a first of said conditions with the sash in a closed position the operating member locks the sash to the frame, in a second of said conditions the operating member frees the sash from the frame and locks the stiles to the sash to permit tilting of the sash with said stiles from the closed position into a ventilating position and in a third of said conditions the operating member unlocks said stiles from the sash to permit the sash to be rotated horizontally about said one end of said stiles and into a reversed position.

Abstract: A hinge and pivot arrangement for a movable member such as a window sash, and a co-operating frame, comprises two hinges arranged at opposite ends of one member of the frame to permit the movable member to be hinged thereabout when an operating handle which moves an operating rod and carries a locking member is moved to a second position from a first position in which the locking member engages a striker plate on another member of the frame, opposite to the said one frame member, to secure the movable member to the frame against opening, and in a third position of the operating handle, the locking member is disengaged from the striker plate and a bolt co-operating with means for releasably connecting one of said hinges to the movable member disconnect the hinge from the movable member and a pin carried by the operating rod is engaged in the channel of a stay pivoted at one end to said another frame member to permit the movable member to tilt within the limit imposed by the stay relative to a further member of