Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Patent
1984-10-31
1986-07-22
Willis, Davis L.
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
313324, H01J 152, H01J 1940
Patent
active
046021850
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to electrical engineering, concerns lighting equipment and, in particular, an arc tube support of a gaseous-discharge lamp.
PRIOR ART
Known gaseous-discharge lamps are usually made as a glass bulb wherein an arc tube is mounted on a support and is electrically connected with the metal base of the lamp, which is intended for screwing the lamp in the lighting fixture.
Known in the art is an arc tube support of a gaseous-discharge lamp, comprising several separate mounting elements, such as loops, brackets, plates and other, which embrace the sealings of the arc tube and are secured, by electric welding, to metal props of wire. This type of support is typical for discharge lamps manufactured by Polan in Poland, by Tesla in Czechoslovakia, by other companies.
However, such arc tube supports require too much metal and are still insufficiently reliable since the number of welding points per lamp vary from 11 to 27. In addition, the fastening elements cannot be reused if some defects in arc tubes or lamps are revealed at a later stage of the technological manufacturing process, since the structure is welded and nondetachable.
Also known in the art is an arc tube support for a gaseous-discharge lamp, which is made from one piece of bent wire having a central straight portion extending along the arc tube and looped ends. These looped ends envelop the sealed-in ends of the arc tube and form closed loops welded together (cf., for example U.S. Pat. No. 3,218,495 Cl. 313-25, published in 1965).
However such arc tube support, like the one described above, cannot be reused in the manufacturing process in case some defects of arc tubes or lamps are exposed at a later stage, since the looped portions thereof are welded together. In addition, the bending and welding of the looped portions is done after the arc tubes are fitted therein, and the arc tubes can be accidentally damaged.
DISCLOSURE OF THE INVENTION
An object of present invention is to provide an improved arc tube support of a gaseous-discharge lamp, which is reliable and can be reused in case some defects of arc tubes or lamps are revealed at a later stage of manufacture.
This is achieved in that in an arc tube support of a gaseous-discharge lamp, which is made from bent wire having a central straight portion extending along the arc tube and loop-like end portions enveloping the sealed-in ends of the arc tube, according to the invention, the loop-like portions are made as spring grips partially embracing the sealed-in ends of the arc tube.
The spring grips can have their open parts facing in one direction or towards each other.
The arc tube support of a gaseous-discharge lamp, according to the invention, is uncomplicated but reliable, convenient for assembly, and reusable if other components of the gaseous-discharge lamp become defective in the process of manufacturing.
BRIEF DESCRIPTION OF DRAWINGS
The invention will now be described in greater detail with reference to a specific embodiment thereof, taken in conjunction with the accompanying drawings, wherein:
FIG. 1 shows a front view of an arc tube support of a gaseous-discharge lamp, according to a preferred embodiment of the invention;
FIG. 2 shows a side view of FIG. 1;
FIG. 3 shows a top view of FIG. 1;
FIG. 4 shows a support assembly featuring an arc tube and a comb stem;
FIG. 5 shows a front view of a support inside a gaseous-discharge lamp bulb;
FIG. 6 shows a side view of FIG. 5.
BEST MODE FOR CARRYING OUT THE INVENTION
The arc tube support of FIGS. 1,2 and 3 is made of a piece of wire and has a straight central portion 1, end loop-like portions 2 which are spring grips, and transition portions 3 between the straight portion 1 and the end portions 2, which are bent to 45.degree. in relation to the straight portion 1. In the support embodiment of FIGS. 1,2,3 the loop portions 2 have their open parts facing in the same direction.
Another support embodiment as shown in FIG. 4 has, according to the invention, the open parts of its loop porti
REFERENCES:
patent: 2802961 (1957-08-01), Jenne, Jr.
patent: 2830210 (1954-09-01), Jenne, Jr. et al.
patent: 2918592 (1959-12-01), Pomfvett et al.
patent: 3218495 (1965-11-01), Hasell et al.
patent: 4341975 (1982-07-01), Phillipp et al.
Kagansky Arkady I.
Petukhov Mikhail M.
Roiz Lev M.
Oen William L.
Poltavsky Zavod Gazorazryadnykh Lamp Imeni Komsomola Ukrainy
Willis Davis L.
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