Patent GB-749928-A (GB)
Title: Remotely-operated means for the opening and closing of windows, ventilating shutters or the like
Inventor: BENTLEY JAMES SYDNEY
IPC: E05F11/34
Filed: 1954-02-17
Abstract: 749,928. Operating windows and ventilating shutters. TELEFLEX PRODUCTS, Ltd. Feb. 17, 1954, No. 4669/54. Classes 20(3) and 137. Means for opening and closing windows, ventilating shutters or the like by push and pull movements of a flexible cable moving in a fixed conduit and having on its surface spaced projections to gear with a suitably mounted toothed gear wheel and comprising also two telescopic externally threaded spindles, has the toothed wheel mounted in a casing having a passage for the flexible cable tangential to the periphery of the wheel and formed with or secured thereto a nut device which in at least one position is co-axial with the wheel and into which the outer and hollow spindle is screwed, the outer spindle having stop means at both ends and on its interior at the end nearer to the window or the like a screw-threaded nut portion into which is screwed the inner spindle ; the inner spindle has stop means at one end and at the other is pivotally secured to the window or the like in such a manner that it is prevented moving about its own axis, the arrangement being such that from a position in which the window or the like is closed movement of the flexible cable rotates the toothed wheel and projects first the inner spindle and then the hollow spindle towards the window or the like to open it, the spindles being retracted in turn when the window or the like is closed by opposite movement ' of the flexible cable. As shown in Fig. 1, the operating means is mounted in a cylindrical casing 10 secured in a bracket 9 to the frame 6 of a window 5. The casing 10 houses a toothed wheel 11 and is rotated by operating a flexible cable 13. The wheel 11 has an annular portion 17 in which a sleeve 18 is held by a spring ring 19. The wheel 11 and the sleeve 18 are shaped to provide a seating for a partial sphere 21 which on its exterior has grooves 22 which accommodate the ends of pins 20 which project through the wheel 11 and parts of the surfaces of which engage in semi-cylindrical grooves formed in the sleeve 18. The partial sphere 21 has a threaded bore which receives a hollow threaded spindle 23 which has stop means 24 and 25 at its ends. The spindle 23 is threaded internally at 27 and receives an inner threaded spindle 26 which has stop means 28 at one end and at the other is pivotally secured to the window 5 by a pin 30 extending between two limbs of a bracket 29. Axial rotation of the spindle 26 is prevented by a set screw 33. The assembly is held in the casing 10 by a " C " clip 35 which permits the wheel 11 and the parts connected thereto to rotate freely within the casing. In operation movement of the cable 13 first projects the hollow spindle 23 forward until the stop 25 abuts the partial sphere 21 when the inner spindle 26 is projected forward and allows the further opening of the window until the stop means 28 abuts the partial sphere 21. On opposite movement of the cable the spindles are retracted in turn and the window closed. In a modification the threaded portion which receives the hollow threaded spindle may be formed integrally with the toothed wheel and the toothed wheel is carried in a casing which can turn about an axis at right angles to the telescopic spindles. For a casement window, Fig. 4, the operating means is mounted on an angularly placed bracket 50 and the inner spindle 57 is provided with a pin 38 which engages in a slot 59 of a fitting fixed to the sash 48 of the window.