DIMMING DEVICE FOR AN AIRCRAFT WINDOW

Abstract: The invention relates to transport techniques and can be used for protecting passengers and a pilot in a cabin of an aircraft or another transport means against intense light, in addition to an auxiliary arrangement for moving mobile furniture elements. The dimming device comprises a blind and a mechanism for moving the blind, including guides for translational displacement of the blind and axial connecting elements of said mechanism. Intermediate non-rigid elements like, for example, a self-adhesive gearing band are arranged between contacting surfaces of the blind and the guides. The device ensures smooth displacement of the blind by means of decreasing friction force between the contacting elements and reduces noise occurring while the device is in use.

Description: Field of the Invention The invention relates to aircraft engineering and transport engineering, particularly to dimming devices for aircraft, and can be used for protecting passengers and a pilot in a cabin of an aircraft against intense light, in addition to an auxiliary arrangement for moving mobile furniture elements. Background of the Invention It is known a blind (USSR Inventors Certificate No. 1770161, IPC B60J 1/20, E 06 B9/56, publ. 23.10.92) comprising a flexible canvas, an upper part of which is fixed on a bearing located roller. A disadvantage of this device is unsmoothed movement of the blind, as well as unreliability thereof during exploitation. A universal panel of a flight deck sidewall (US Patent No. 5044578, IPC B64D 11/00, B64C 1/14, publ. 03.09.91) is known. It comprises flexible side wall panels and device for fixing thereof to the aircraft frame. Contacting surfaces of the device, i. e. blind and guides, rub and quickly wear out, which is rather inconvenient in exploitation. Furthermore, movement of the blind in the blind securing device is not smooth because of a big friction force between the surfaces of the blind and the guides due to the lack of a transitional element. Light collapsible beam of a box section for a free standing display (US Patent No. 5060448, IPC A47B 96/14, publ. 29.10.91) is known. It comprises through-like sections, equipped with separated parallel plates. A disadvantage of this device is noise during motion of the movable plates as well as wearing out thereof because of a friction. A dimming device for an aircraft window is known (USSR Inventors Certificate No. 498211, IPC B64C 1/14, E06B 9/56, A47H 5/032, publ. 05.01.76) having a blind and a mechanism for moving the blind. The mechanism for moving the blind comprises a roller located on a pin to which the blind is fixed. Lower corners of the blind are connected to the roller by means of a cord. A further dimming device to cover a roof opening of a vehicle is known from DE 196 49 118. The blind of the dimming device is constituted by a plurality of rigid lamellae, so that the blind can be rolled on a shaft by means of a drive, wherein the blind is guided in guiderails. The disadvantages of these dimming devices are as follows: low technological effectiveness of the design manufacturing because of a lot of parts in the mechanism for moving the blind; low level of the device reliability because of sticking between the device elements, and particularly between the cord and the blind, which are made of flexible material; poor smoothness of the blind movement because of direct contact between the contacting surfaces, which result in friction sound occurring while the device is in use. The closest to the invention by technical essence, objective and achieved result is DE 3346976 A1. It discloses a dimming device for an airplane window comprising a blind with laterally mounted U-shaped strips that are provided with inner springs for adjusting the width of the blind. The strips move within vertical guides with fixed width which are formed by set square profile and the curved section of the window wall paneling. It is not possible to change the width of the guide channel. The above-identified disadvantages of the prior art lead to inconvenience during its exploitation and breakage of the device. Description of the invention. The objective of the invention is to increase technological effectiveness of the design manufacturing by decreasing the number of parts of the mechanism for moving the blind. Another objective is to increase the device reliability by manufacturing the blind out of rigid material, and therefore to exclude a source of sticking between the parts of the mechanism for moving the blind. Furthermore, objective of the invention is to increase smoothness of the blind movement and exclude noise occurring while the device is in use, by means of arranging an intermediate non-rigid element like, for example, self-adhesive gearing band between the contacting surfaces of the blind and the guards. Another objective of the invention is to provide simple maintenance and longer operational life of the mechanism for moving the blind. These objectives are solved in that the mechanism for moving the blind contains guides for translational displacement of the blind, axial connecting elements for tightening of the elements of the mechanism for moving the blind, and thereby ensuring the necessary gap between the guides, wherein intermediate non-rigid elements like, for example, a self-adhesive gearing band are arranged between contacting surfaces of the blind and the guides. The device provides increasing of the technological effectiveness of the design manufacturing due to the fact, that the mechanism for moving the blind having less parts, namely, the intermediate element like self-adhesive gearing band, the blind guides and axial connecting elements of the mechanism for moving the blind. The device provides increasing reliability because the elements of the mechanism for moving the blind are immovable during exploitation, thereby excluding the effect of sticking. The blind is manufactured out of rigid material, and there is no necessity to roll the blind up and down, so it moves only onward or backward in the guides to shut or open the window. Its surfaces contact with the corresponding surfaces of the guides through non-rigid intermediate elements, like self-adhesive gearing band. The smoothness of the blind motion is increased due to arranging the intermediate non-rigid elements, like self-adhesive gearing band, between the surfaces of the blind and the guides, which provides decreasing the friction between said surfaces and ensures convenience of exploitation. The friction force is required only for fixing the blind in the required opening position. Arranging the intermediate non-rigid elements results in excluding the noise while opening or shutting the blind. In other words, one will hear only pleasant rustling noise during the blind movement. Furthermore, the device provides simpler maintenance and longer operational life of the mechanism for moving the blind by means of axial connecting elements. In this way it is easy to disassemble the mechanism and, if necessary, to correct the size of the gap between the guides. Thus, the friction force that is required for moving and fixing the blind in the required opening position. Short Description of Drawings Fig.1 shows a general view of the blind in the window side panel of an aircraft; Fig. 2 shows cross-section A-A. Description of a Preferred Embodiment Referring now to Figs. 1 and 2 in which a preferred embodiment of the invention is shown, the dimming device contains a blind 1 and device for its moving, which is composed of intermediate non-rigid elements 2, like self-adhesive gearing band, fixed on the guides 3, and axial connecting elements 4, which connects the elements of the mechanism for moving the blind. The device works in the following manner. When the blind 1 is moved in guides 3 the intermediate non-rigid elements 2 provide a friction force, sufficient to hold the blind 1 in the required position of opening. Axial connecting elements 4 serve for tightening of the moving elements, and thereby to ensure the necessary gap between the guides 3. The size of the gap is settled during the mounting of the elements inside the mechanism for moving the blind. Industrial Applicability The device is industrially applicable and could be used for protecting passengers and a pilot in a cabin of an aircraft against intense light, as well as to serve as an auxiliary arrangement for moving mobile furniture elements. The best application of the device is inside the aircraft cabin to protect passengers against undesirable sunlight. The device life time is increased due to arranging of the intermediate non-rigid elements which decrease a friction force between the contacting surfaces of the blind and the guides, and therefore, prevent the abrasion of the rubbing surfaces. The device is more convenient in use because of reducing of the noise occurring during motion of the blind.

Claims: A dimming device for an aircraft window comprising a blind (1), that is manufactured out of rigid material and a mechanism for moving the blind that includes guides (3) for translational displacement of the blind (1) and intermediate non-rigid elements (2) arranged between contacting surfaces of the blind (1) and the guides (3), characterized in that the intermediate non-rigid elements (2) are fixed on the guides (3), and in that the guides (3) are connected by means of axial connecting elements (4) which are arranged in a manner to ensure a gap between the guides (3) for disposing the blind (1) and tightening the blind (1) in the gap. A dimming device according to claim 1, wherein the intermediate non-rigid elements (2) comprise a self-adhesive gearing band.

Inventors: LOGVINENKO YURIY, PIDPRUZHNIKOV VLADYSLAV, LOGVINENKO, YURIY, PIDPRUZHNIKOV, VLADYSLAV
Applicants: INTERAMI LTD, INTERAMI LTD.
Application year: 2000
Main classification: B60J1
IPC codes: B64C1, B60J1