Electric lamp and discharge devices – With temperature modifier – Double wall – jacket or casing for envelope
Reexamination Certificate
1998-04-24
2001-02-13
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With temperature modifier
Double wall, jacket or casing for envelope
C313S011000, C313S017000, C362S416000
Reexamination Certificate
active
06188164
ABSTRACT:
TECHNICAL FIELD
This invention relates to arc discharge lamps and more particularly to a new mount assembly for supporting the arc tube from the glass stem of the lamp.
BACKGROUND ART
In the manufacture of metalarc lamps, it is necessary to properly orient the arc tube within a lamp envelope.
This has been done in the past by hand-crimping a single metal strap having a mount frame comprised of a pair of elongated rods attached thereto to the glass stem of the lamp. The strap was clinched at a single point about the glass stem and frames. In addition to being labor-intensive, this method was ineffective; the proper alignment of the frames about the glass stem was not always achieved. Another problem common to this earlier procedure was maintaining a small, compact configuration of the band around the glass stem, so that subsequent manufacturing processes could be accommodated. A further problem with the aforesaid procedure was its inability to maintain proper stem tolerances and hand crimping pressure. Stem breakage was a fairly common occurrence. Needless to say, the hand clinching of the strap about the lamp frames and glass stem was both costly and inefficient.
DISCLOSURE OF INVENTION
It is, therefore, an object of this invention to obviate the disadvantages of the prior art.
It is another object of the invention to enhance arc discharge lamp mount assemblies.
It is another object of the invention to provide a mount assembly having a banding system that releases excess tension as it is affixed to the glass stem of the lamp.
These objects are accomplished, in one aspect of the invention, by the provision of a mount assembly which comprises first and second axially aligned annular banding straps. Each of the banding straps has a closed crimp section and an open crimp section diametrically opposed to one another. The banding straps are positioned so the closed crimp of the first strap overlies the open crimp of the second strap. A pair of diametrically opposed mount frame receiving areas are positioned substantially equidistantly between the crimp sections, and a mount frame, comprised of two elongated rods, is fixed to the banding straps, each of the rods having a portion fixed in one of the mount frame receiving areas.
This mount assembly can be attached to the glass stem in an efficient manner. The oppositely disposed open crimps of the two bands operate to equalize the forces applied when the crimps folded thereby greatly reducing breakage of the glass stems.
REFERENCES:
patent: 5023505 (1991-06-01), Ratliff et al.
patent: 5122706 (1992-06-01), Parrott et al.
patent: 5136204 (1992-08-01), Muzeroll et al.
patent: 5252885 (1993-10-01), Muzeroll et al.
patent: 5339001 (1994-08-01), King et al.
patent: 5521458 (1996-05-01), Kulik, Jr.
patent: 6008566 (1999-12-01), Brown et al.
Brown Randall D.
Crainich Lawrence
Swadel Joseph C.
Walker Steven
Gerike Matthew J.
McNeill William H.
Osram Sylvania Inc.
Patel Nimeshkumar D.
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