Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1995-06-15
1997-12-23
Patel, Ashok
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313567, 31331805, 3133181, 313 27, 362219, 422 24, 250436, 439602, 439611, H01J 6134, C02F 132
Patent
active
057010501
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to an immersion lamp for a photochemical reactor with a discharge lamp, wherein the discharge lamp is seated in an exterior bulb through which an inert gas flows and has a lamp bulb with axially oppositely located, mechanically stable electrical connectors, which is held in and connected with a socket of the exterior bulb, wherein the exterior bulb is tube-shaped and has at least one open end and projects into a chamber of a connecting head for electrical connection and secure mechanical support, and its use.
BACKGROUND OF THE INVENTION
An immersion lamp in accordance with the structural system containing an Hg high-pressure radiator is recited on page 13 of the prospectus Heraeus Original Hanau D 310625/2C 9.89/VN PK of W. C. Heraeus GmbH. As can be seen in FIG. 8, the radiator is fastened in the immersion tube by means of straps and seals via a radiator support with a lead, wherein the immersion tube in turn is located in a cooling tube with straps and seals. In this case the immersion tube is flooded with an inert gas via an inlet connector and an outlet connector at the head plate. The cooling tube offers the opportunity of water cooling between the immersion tube and the reaction material. The connection between the head plate or immersion lamp head, as well as the connection of the immersion tube, with the cooling tube takes place via normal flange connections.
An immersion lamp with a mercury high pressure radiator is furthermore known from DE-PS 855 397, which is housed in the interior of an outer bulb closed at one end and wherein the area intended for the radiation to exit consists of transparent quartz glass and its remaining areas of opaque quartz glass. The exterior bulb is sealingly fixed in an opening of the wall of the radiation vessel by means of a circumferential packing box seal; the exterior bulb is closed off by means of a box-shaped connecting head with a current allocation and a cooling air connection, wherein the connecting head is fastened by means of straps at the upper end of the exterior bulb.
Assembly in case of changing the exterior bulb or the discharge lamp has been shown to entail problems because in this case it is necessary to handle straps and seals especially carefully to assure sufficient stability and sealing.
Furthermore, U.S. Pat. No. 3,617,701 describes an electrical heating element which is surrounded by a quartz glass tube closed off on one side to form an immersion tube and is sealingly maintained with its open end in a connecting head by means of an epoxy resin adhesive.
Here, too, assembly or exchange of the quartz glass tube entail problems because of the adhesion, since great skilled efforts are required to achieve sufficient stability and sealing.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a mechanically rigid, sealing and clamping mounting on an open end of an outer bulb of an immersion lamp, wherein the mounting is intended to make simple assembly possible, in particular in the course of changing the exterior bulb or exchanging the discharge lamp.
This object is attained by the present invention.
Preferred embodiments of the invention as well as its use are recited in the dependent claims.
It has been shown to be advantageous that the seal consists of module-like elements so that it is possible, depending on the length of the radiator or the flow pressure acting on the exterior bulb, to achieve an optimal adaptation with sufficient stability by means of individual or several module-like sealing elements. A further advantage is to be considered that a quick change of the exterior bulb or the discharge lamp can be performed by doing away with the setting times of adhesives.
BRIEF DESCRIPTION OF THE DRAWINGS
The subject of the invention will be explained in detail by means of FIGS. 1, 2 and 3.
FIG. 1 is an elevational, broken-sectional view which shows an immersion lamp with an inserted radiator lamp in longitudinal section.
FIG. 2 is an elevational, broken-sectional view which
REFERENCES:
patent: 2963603 (1960-12-01), Germer
patent: 3617701 (1971-11-01), Volker
patent: 5334905 (1994-08-01), Ullrich
Patent Abstracts of Japan, vol. 15, No. 512 (C-0898) 1991 of JP-1-03 224 675.
Heraeus Original Hanau D 310625/2C 9.89/VN Pk of W. C. Heraeus GmbH; Sep. 1989.
Daus Manfred
Wolf Christoph
Heraeus Noblelight GmbH
Patel Ashok
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