Halogen lamp with light exit shield

Details Halogen lamp with light exit shield Halogen lamp with light exit shield

1999-01-29

2001-01-30

O'Shea, Sandra (Department: 2875)

Illumination

Guard means

C362S263000, C362S290000, C362S354000

Reexamination Certificate

active

06179450

ABSTRACT:

BACKGROUND OF THE INVENTION
The lamps which have a removable light exit shield with a permanently installed shield disk, that is, a clear or matte disk of glass, plastic, or the like, at the light exit opening of its housing, are known. Light exit shields with permanently installed shield grids are also known.
SUMMARY OF THE INVENTION
According to the invention, therefore, a lamp which can be provided with any desired type of light source and which has a flip-up light exit shield with a permanently installed lens or shield disk and a second permanently installed shield disk is known from U.S. Pat. No. 5,349,510. No provisions are made for the possible removal of the lens and/or the shield disks, and any attempt at such removal would be associated with considerable effort.
A halogen lamp in which two shield disks and a shield grid are laid loosely between two retaining rings in the light exit opening of the housing is known from CH680,684. The front or outer retaining ring can be removed from the housing, whereupon the shield disks and the shield grid are freed and can fall out of the light exit opening.
The goal of the present invention is to provide a halogen lamp in which it is possible to install, in removable fashion, one or two of the same or different shield disks and a shield grid in a light exit shield which can be removed from the lamp housing. It is also to be possible to handle the light exit shield as a closed functional unit, regardless of the number of parts which have been inserted into it.
This task is accomplished in accordance with the invention in a halogen lamp of the type comprising a housing, a halogen bulb installed in the housing, and a light exit shield removably mounted in the light exit opening of the housing. The lamp includes a support ring with a radially inward-projecting ring land, a first ring-shaped groove on inside radial surface of said support ring, a first O-ring mounted in said groove, ring land being in front of the forward of the first O-ring. A first shield disk rests against the rear surface of the ring land, and a shield grid is removably mounted in the support ring.
The light exit shield designed according to the invention can therefore be handled as a closed functional unit comprising any desired set of shield disks and/or shield grids and can be removed with all of its parts held loosely in it from the housing and possibly reinstalled after certain of the individual parts have been replaced.
The first O-ring or, in the case of the embodiment, having two O-rings are held in their grooves regardless of whether or not they are resting against shield disks. As desired, one or two shield disks can be inserted at the locations provided for them in front of the first O-ring or between the two O-rings. The shield grid, which is also removable, is held in any desired manner, i.e., either in a positive form-locking or in a friction-locking manner, at the inner end of the support ring.
There are other features of the present invention including a spacer ring, which serves, first, to provide support against the halogen bulb mounted in the housing and second to support the loose retaining ring of the shield grid. The specific designs such as the lead or bayonet arrangement to hold the spacer ring or the retaining ring itself on the housing are also meritorious advanced of the present invention.


REFERENCES:
patent: 1343899 (1920-06-01), Best
patent: 1619720 (1927-03-01), Gordon
patent: 1712351 (1929-05-01), Mara
patent: 2119370 (1938-05-01), Van Leunen
patent: 5349510 (1994-09-01), Jordan et al.
patent: 680 684 (1990-08-01), None
patent: 4202295 C1 (1992-01-01), None
patent: 4204669A1 (1992-02-01), None
patent: 4210439A1 (1992-03-01), None

Affiliated with

Also associated with

Rating

Halogen lamp with light exit shield does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Halogen lamp with light exit shield, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Halogen lamp with light exit shield will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2450155