Abstract A fluorescent lamp protective assembly employing a plastic shield over the fluorescent tube glass envelope is adapted for use with high output fluorescent lamps that exhibit high intensity localized heating in the vicinity of the lamp cathode. A wire mesh screen formed into a cylindrical roll is inserted with the plastic shield at each end of the lamp. The wire mesh protects the plastic shield from the heat output of the lamp provided the mesh is of the woven wire cloth type in which the crossing wire elements have been deformed during the weaving process so as to be in intimate contact with each other at each intersection and not of the seamless ''''stocking'''' type. With the wire cloth mesh, polycarbonate plastic tube shields may be employed to provide implosion protection for high output and very high output fluorescent lamps without subjecting the plastic tube shield to discoloration, blistering, cracking or other heat damage from the filament.
Inventors
👤 P Pollara
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-27 10:45
CPC Classifications
F; F21; F21V; F21V25/00; F21V29/00; F21V29/15
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
102 words
In a protective assembly for A plastic jacketed fluorescent lamp having a lamp cathode that produces a locallized heating of the fluorescent lamp glass envelope of sufficient magnitude normally to damage the plastic protective jacket, the combination comprising a cylindrical wire mesh grating interposed between said glass lamp envelope and said plastic protective jacket, said wire mesh grating having an axial length extending throughout the region of locallized lamp envelope heating and being formed of wire cloth wherein the woven wire elements cross each other substantially orthogonally and at each point of crossing are in sufficiently intimate contact to produce wire deformation.
Claim 2
Dependent Claim
102 words
In a protective assembly for A plastic jacketed fluorescent lamp having a lamp cathode that produces a locallized heating of the fluorescent lamp glass envelope of sufficient magnitude normally to damage the plastic protective jacket, the combination comprising a cylindrical wire mesh grating interposed between said glass lamp envelope and said plastic protective jacket, said wire mesh grating having an axial length extending throughout the region of locallized lamp envelope heating and being formed of wire cloth wherein the woven wire elements cross each other substantially orthogonally and at each point of crossing are in sufficiently intimate contact to produce wire deformation.
Claim 3
Dependent Claim
29 words
In a protective assembly according to claim 1, the combination wherein said wire deformation is evidenced by localized flattening of the wire elements at each point of cross over.
Claim 4
Dependent Claim
26 words
In a protective assembly according to claim 1, the combination wherein said wire mesh grating employs copper or aluminum wire of from 0.008 to 0.012 diameter.
Claim 5
Dependent Claim
27 words
In a protective assembly according to claim 1, the combination wherein said wire mesh is of aluminum or copper wire cloth having an 18 by 16 mesh.