| Half-level light signaling device -> Monitor Keywords |
|
|
  Half-level light signaling deviceHalf-level light signaling device description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070171632, Half-level light signaling device. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to the technical field concerning transmission of radio-frequency signals from light sources, in particular from half-level signaling devices. DESCRIPTION OF THE PRIOR ART [0002] As it is known, such signaling devices include a casing defined by a lower part embedded in the ground and a metallic cap protruding from the casing and housing, in one or more separate seats, suitable prisms for lighting of the surrounding area. [0003] The power and control circuitry is situated in the part embedded in the ground, in order to feed the light source and to check its operational state and its physical integrity. [0004] The cap is made of a material, which bears the continuative action of the exogenous agents and of the mechanical stresses of compression, caused by the passage of possible means. [0005] These light sources usually constitute the loads of lighting equipments of a certain extension and importance, which supply airports or anyway areas, in which the operational continuity of the above apparatuses is essential for security. [0006] Thus, it is necessary to prepare a of radio-frequency transmission system, which is safer, cheaper and more flexible than a cable system (see EP1239704), which allows exchange of information concerning the operational state of each element of the system with other surrounding elements and with a suitable central Unit. Therefore, each load must have an antenna for this purpose. [0007] As it is known, the half-level light signaling device is made of metallic material, therefore the electromagnetic wave emitted by the antenna possibly introduced into the casing would be strongly weakened, and consequently the comprehensibility of the information signal contained therein would be put at risk. [0008] The degradation of the wave in input/output of the light signaling device can be limited by a suitable housing of the antenna made in the cap protruding from the ground, which mutually isolates the metallic parts. [0009] From the other side, the so obtained recess would require an increase of the resulting thickness of the cap, needed to maintain intact the mechanical compactness with respect to the known solutions. [0010] From one side, the above solution facilitates the signal transmission, limiting its weakening to minimum, from the other side, it is expensive and complicated because it requires, as it has been noted, the definition of a suitable recess containing the antenna in the metallic cap and of a suitable isolation system between the antenna and the metallic part embedded in the ground. SUMMARY OF THE INVENTION [0011] The object of the present invention is to propose a half-level signaling device, in which the cap--antenna assembly allows a transmission/reception of the signal, free of any weakening or deformation. [0012] Another object of the present invention is to propose the above cap--antenna assembly, which optimizes the isolation with respect to the mass of the antenna and which does not jeopardize the cap mechanical resistance. A further object of the present invention is to propose a simple technical solution, which is easy to realize and allows to reduce the production costs. The above mentioned objects are obtained in accordance with the contents of the claims. BRIEF DESCRIPTION OF THE DRAWINGS [0013] The characteristic features of the invention will be pointed out in the following description of some preferred but not exclusive embodiments, with reference to the enclosed figures, in which: [0014] FIG. 1 is a top view of a cap for a half-level light signaling device, proposed by the present invention; [0015] FIG. 2 is a schematic section view taken along II-II of FIG. 1. DESCRIPTION OF THE PREFERRED EMBODIMENTS [0016] Regarding the above Figures, the reference numeral 10 indicates a casing formed by a lower part 4, shown schematically and embedded in the ground (for example road surface, aircrafts runways, etc.) and the reference numeral 1 indicates the cap protruding from the ground. [0017] An antenna 2, connected to the cap 1, has terminals 5a and 5b connected to the circuitry situated in the lower part 4 of the light signaling device, not shown, as it is known. [0018] The cap includes one or more apertures 3a and 3b for housing suitable prisms (not shown, as they are known), aimed at sending relative light beams, generated by one or more lamps (not shown) inserted in the lower part 4 of the casing, to the surrounding area. The cap is obtained from a synthetic resin, by molding. In particular, the antenna is introduced into the mold before the molding operation, so that at the end it is completely dipped to form one body with the cap. [0019] The cap, made of metallic material, forms seats 9, which receive means (not shown) for removably fastening the cap to the lower part 4. [0020] According to an interesting variant, besides the antenna, also prisms can be introduced into the mold during the molding operation. Continue reading about Half-level light signaling device... Full patent description for Half-level light signaling device Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Half-level light signaling device patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Half-level light signaling device or other areas of interest. ### Previous Patent Application: Led cove lighting for exterior fascia Next Patent Application: Portable lighting device Industry Class: Illumination ### FreshPatents.com Support Thank you for viewing the Half-level light signaling device patent info. IP-related news and info Results in 0.66752 seconds Other interesting Feshpatents.com categories: Canon USA , Celera Genomics , Cephalon, Inc. , Cingular Wireless , Clorox , Colgate-Palmolive , Corning , Cymer , |
||
