By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Krapf, Stefan (Flossenburg, DE); Schroer, Frank (Weiden, DE); Pedimonte, Andreas (Weiden, DE), filed on February 11, 2015, was published online on November 28, 2017.
The assignee for this patent, patent number 9827927, is Nexans (Paris, FR).
Reporters obtained the following quote from the background information supplied by the inventors: "Field of the Invention
"The invention relates to a device for transmitting electrical current and/or signals in a motor vehicle, wherein the device has a wind up spring cassette consisting of a stator and a rotor, and at least one fixing element through which the relative positions of the stator and the rotor of the wind up spring cassette are fixed in the wind up spring cassette in the steering wheel of the motor vehicle. In the wind up spring cassette, at least one line extending in windings is arranged which is connected with one end to the stator and with the other end to the rotor.
"Description of Related Art
"Wind up springs are preferably used today in motor vehicles for transmitting electrical or optical signals, for example, for triggering the air bag in the steering wheel, between stationary and moveable motor vehicle parts. The line may comprise electrical and/or optical lines. Wind up springs ensure a secure and permanent electrical and/or optical connection. Wind up springs are called lines which are wound within the cassette either spirally in concentric windings for winding a core in the cassette, or are in a loop guided around a core in the cassette (the latter also being called short strip winding spring or U-turn winding spring). With its two ends, the line connects a structural component (the rotor) rotatable with the steering wheel to a structural component (the stator) fixed to the motor vehicle optically and/or electrically to each other. Wind up springs permit a relative rotational movement of the stator and of the rotor without impairing the secure electrical and/or optical connection between vehicle components which are fixed relative to the vehicle and steering wheel. The line may be, for example, a flexible flat band line (FBL), i.e. conducting webs which are embedded in the insulating material at a distance from each other. The rotor and the stator together form a housing which receives the line, which is also called the wind up spring cassette.
"For mounting the wind up spring cassette in the steering wheel of a motor vehicle, it is important that the two ends of the FBL or of another line assume a certain position relative to each other. This ensures that the predetermined rotations of the rotor can be carried out in both directions of the steering wheel without the line tearing from the cassette.
"DE 42 16 526 A1 describes an electrical line extending in windings accommodated in a circular cassette, wherein the cassette is composed of a rotor rotatable about the axis of the cassette, and a stator. In order to hold the two components in a certain position during mounting in the steering wheel of a motor vehicle, an outwardly projecting attachment is provided on the rotor for receiving a screw and a spring adjustable by means of the screw. In the mounted position of the cassette, a spring is pressed into a recess of the stator, so that the rotor immovably rests against the stator. In the position of operation, the locking action is removed by loosening the screw."
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "The invention is based on the object of making available an improved device for transmitting an electrical current and/or signals in a motor vehicle which includes a stator and a wind up spring cassette composed of a rotor and, at least one fixing element, which can be realized easily, quickly and inexpensively and in which the wind up spring cassette components are secured safely relative to each other.
"In accordance with the invention, this object is met in that the fixing element is a foil like label which is mounted on the outside of the wind up spring cassette, and which extends from the rotor to the stator, and that the label is secured mechanically irremovably from the stator as well as the rotor.
"The device according to the invention permits the fixing of the stator and the rotor in the predetermined positions relative to each other for mounting the wind up spring cassette in the steering wheel. This assembly position or center position ensures that the line is not damaged or otherwise negatively affected in the position of operation. The irremovable mechanical connections between the label and the rotor or the stator make the connections particularly secure and also permanent over longer periods of time as well as over longer periods of time in storage or being transported. In contrast to a simple adhesive label, there is no danger of separation because the mechanical connection of the label is permanent, even under the different environmental influences and is practically not subject to aging phenomena. The foil like label is an element which is commercially available and which, in comparison to other machine made securing elements, is relatively inexpensive. The mechanical attachment of the label to the stator and to the rotor can take place automatically, for example, by riveting or welding, so that the device according to the invention can be manufactured in a particularly simple manner. In the operating position, the label is torn up after mounting of the wind up spring cassette during the first rotational movement of the steering wheel and, thus, of the rotor. No harmful elements which could impair the function of the wind up spring remain because the two parts of the label are each permanently attached to the rotor or the stator. The mechanical connection of the label, therefore, remains permanently attached well beyond the required duration for the attachment of the label."
For more information, see this patent: Krapf, Stefan; Schroer, Frank; Pedimonte, Andreas. Device for Transmitting Electrical Current And/Or Signals in a Motor Vehicle. U.S. Patent Number 9827927, filed February 11, 2015, and published online on November 28, 2017. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9827927.PN.&OS=PN/9827927RS=PN/9827927
Keywords for this news article include: Nexans.
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